Here's a naga/lamia (males and females of the race respectively) race for DF 44.12
[CREATURE:SNEK]
[NAME:snek:snek:snek]
[DESCRIPTION:A humanoid which resembles a hybrid of human and snake.]
[OUTSIDER_CONTROLLABLE]
[CREATURE_TILE:64][COLOR:3:0:0]
[INTELLIGENT]
[LOW_LIGHT_VISION:10000]
[CANOPENDOORS]
[TRAPAVOID]
[FANCIFUL]
[POPULATION_NUMBER:10:20]
[CLUSTER_NUMBER:2:3]
[LARGE_ROAMING][FREQUENCY:25]
[LARGE_PREDATOR][SAVAGE]
[GRASSTRAMPLE:0]
[BIOME:SHRUBLAND_TEMPERATE]
[BIOME:SAVANNA_TEMPERATE]
[BIOME:GRASSLAND_TEMPERATE]
[BIOME:SHRUBLAND_TROPICAL]
[BIOME:SAVANNA_TROPICAL]
[BIOME:GRASSLAND_TROPICAL]
[LOCAL_POPS_CONTROLLABLE]
[PREFSTRING:snekness]
[BODY:HUMANOID_LEGLESS_NECK:TAIL_SNEK:2EYES:2EARS:NOSE:2LUNGS:HEART:GUTS:ORGANS:THROAT:SPINE:BRAIN:SKULL:5FINGERS:5TOES:MOUTH:FORKED_TONGUE:FACIAL_FEATURES:GENERIC_TEETH_WITH_FANGS:RIBCAGE]
[BODY_DETAIL_PLAN:STANDARD_MATERIALS]
[REMOVE_MATERIAL:SKIN]
[REMOVE_MATERIAL:LEATHER]
[REMOVE_MATERIAL:PARCHMENT]
[USE_MATERIAL_TEMPLATE:SCALE:SCALE_TEMPLATE]
[BODY_DETAIL_PLAN:STANDARD_TISSUES]
[REMOVE_TISSUE:SKIN]
[USE_TISSUE_TEMPLATE:SCALE:SCALE_TEMPLATE]
[BODY_DETAIL_PLAN:VERTEBRATE_TISSUE_LAYERS:SCALE:FAT:MUSCLE:BONE:CARTILAGE]
[USE_MATERIAL_TEMPLATE:NAIL:NAIL_TEMPLATE]
[USE_TISSUE_TEMPLATE:NAIL:NAIL_TEMPLATE]
[TISSUE_LAYER:BY_CATEGORY:FINGER:NAIL:FRONT]
[TISSUE_LAYER:BY_CATEGORY:TOE:NAIL:FRONT]
[BODY_DETAIL_PLAN:LEATHERY_EGG_MATERIALS]
[SELECT_TISSUE_LAYER:HEART:BY_CATEGORY:HEART]
[PLUS_TISSUE_LAYER:SCALE:BY_CATEGORY:THROAT]
[TL_MAJOR_ARTERIES]
[BODY_DETAIL_PLAN:STANDARD_HEAD_POSITIONS]
[BODY_DETAIL_PLAN:HUMANOID_HEAD_POSITIONS]
[BODY_DETAIL_PLAN:HUMANOID_RIBCAGE_POSITIONS]
[BODY_DETAIL_PLAN:HUMANOID_RELSIZES]
[USE_MATERIAL_TEMPLATE:SINEW:SINEW_TEMPLATE]
[TENDONS:LOCAL_CREATURE_MAT:SINEW:200]
[LIGAMENTS:LOCAL_CREATURE_MAT:SINEW:200]
[HAS_NERVES]
[USE_MATERIAL_TEMPLATE:BLOOD:BLOOD_TEMPLATE]
[BLOOD:LOCAL_CREATURE_MAT:BLOOD:LIQUID]
[CREATURE_CLASS:GENERAL_POISON]
[GETS_WOUND_INFECTIONS]
[GETS_INFECTIONS_FROM_ROT]
[USE_MATERIAL_TEMPLATE:PUS:PUS_TEMPLATE]
[PUS:LOCAL_CREATURE_MAT:PUS:LIQUID]
[USE_MATERIAL_TEMPLATE:TEARS:TEARS_TEMPLATE]
[USE_MATERIAL_TEMPLATE:SPIT:SPIT_TEMPLATE]
[SECRETION:LOCAL_CREATURE_MAT:TEARS:LIQUID:BY_CATEGORY:EYE:ALL:EXTREME_EMOTION]
[USE_MATERIAL_TEMPLATE:VENOM:CREATURE_EXTRACT_TEMPLATE]
[STATE_NAME:ALL_SOLID:frozen snek venom]
[STATE_ADJ:ALL_SOLID:frozen snek venom]
[STATE_NAME:LIQUID:snek venom]
[STATE_ADJ:LIQUID:snek venom]
[STATE_NAME:GAS:boiling snek venom]
[STATE_ADJ:GAS:boiling snek venom]
[PREFIX:NONE]
[ENTERS_BLOOD]
[SYNDROME]
[SYN_NAME:snek bite]
[SYN_AFFECTED_CLASS:GENERAL_POISON]
[SYN_IMMUNE_CREATURE:SNEK:ALL]
[SYN_INJECTED]
[SYN_NAME:snek bite]
[SYN_AFFECTED_CLASS:GENERAL_POISON]
[SYN_IMMUNE_CREATURE:SNEK]
[CE_PARALYSIS:SEV:5000:PROB:100:ABRUPT:SIZE_DILUTES:START:0:PEAK:5:END:50]
[CE_SWELLING:SEV:3000:PROB:100:LOCALIZED:ABRUPT:START:0:PEAK:5:END:50]
[CE_BLEEDING:SEV:3000:PROB:100:LOCALIZED:ABRUPT:START:0:PEAK:5:END:50]
[CAN_DO_INTERACTION:MATERIAL_EMISSION]
[CDI:ADV_NAME:Spit]
[CDI:USAGE_HINT:NEGATIVE_SOCIAL_RESPONSE]
[CDI:USAGE_HINT:TORMENT]
[CDI:BP_REQUIRED:BY_CATEGORY:MOUTH]
[CDI:MATERIAL:LOCAL_CREATURE_MAT:SPIT:LIQUID_GLOB]
[CDI:VERB:spit:spits:NA]
[CDI:TARGET:C:LINE_OF_SIGHT]
[CDI:TARGET_RANGE:C:15]
[CDI:MAX_TARGET_NUMBER:C:1]
[CDI:WAIT_PERIOD:30]
[BODY_SIZE:0:0:4000]
[BODY_SIZE:1:168:17500]
[BODY_SIZE:12:0:70000]
[BODY_APPEARANCE_MODIFIER:HEIGHT:75:95:98:100:102:105:125]
[APP_MOD_IMPORTANCE:500]
[BODY_APPEARANCE_MODIFIER:BROADNESS:75:95:98:100:102:105:125]
[SET_BP_GROUP:BY_CATEGORY:TOOTH]
[BP_APPEARANCE_MODIFIER:LENGTH:100:100:100:100:100:100:100] for vampires
[APP_MOD_IMPORTANCE:1000]
[APP_MOD_NOUN:teeth:PLURAL]
[APP_MOD_DESC_RANGE:30:60:90:110:150:190]
[MAXAGE:80:200]
[ATTACK:PUNCH:BODYPART:BY_CATEGORY:HAND]
[ATTACK_SKILL:GRASP_STRIKE]
[ATTACK_VERB:punch:punches]
[ATTACK_CONTACT_PERC:100]
[ATTACK_PREPARE_AND_RECOVER:3:3]
[ATTACK_FLAG_WITH]
[ATTACK_PRIORITY:MAIN]
[ATTACK:SCRATCH:CHILD_TISSUE_LAYER_GROUP:BY_TYPE:GRASP:BY_CATEGORY:FINGER:NAIL]
[ATTACK_SKILL:GRASP_STRIKE]
[ATTACK_VERB:scratch:scratches]
[ATTACK_CONTACT_PERC:80]
[ATTACK_PENETRATION_PERC:200]
[ATTACK_FLAG_EDGE]
[ATTACK_PREPARE_AND_RECOVER:3:3]
[ATTACK_PRIORITY:SECOND]
[ATTACK:BITE:CHILD_BODYPART_GROUP:BY_CATEGORY:HEAD:BY_CATEGORY:TOOTH]
[ATTACK_SKILL:BITE]
[ATTACK_VERB:bite:bites]
[ATTACK_CONTACT_PERC:60]
[ATTACK_PENETRATION_PERC:200]
[ATTACK_FLAG_EDGE]
[ATTACK_PREPARE_AND_RECOVER:3:3]
[ATTACK_PRIORITY:SECOND]
[ATTACK_FLAG_CANLATCH]
[SPECIALATTACK_INJECT_EXTRACT:LOCAL_CREATURE_MAT:VENOM:LIQUID:100:100]
[ATTACK:KICK:BODYPART:BY_TYPE:STANCE]
[ATTACK_SKILL:STANCE_STRIKE]
[ATTACK_VERB:slap:slaps]
[ATTACK_CONTACT_PERC:100]
[ATTACK_PREPARE_AND_RECOVER:4:4]
[ATTACK_PRIORITY:SECOND]
[ATTACK_FLAG_BAD_MULTIATTACK]
[ATTACK_FLAG_WITH]
[BABY:1]
[CHILD:12]
[EQUIPS]
[CREPUSCULAR]
[LISP]
[SMELL_TRIGGER:40]
[APPLY_CREATURE_VARIATION:SNEK_GAITS:900:675:450:225:1900:2900] 39 kph
[APPLY_CREATURE_VARIATION:STANDARD_CLIMBING_GAITS:6561:6115:5683:1755:7456:8567] 5 kph, NO DATA
[APPLY_CREATURE_VARIATION:STANDARD_SWIMMING_GAITS:5341:4723:4112:1254:6433:7900] 7 kph
[APPLY_CREATURE_VARIATION:STANDARD_CRAWLING_GAITS:2990:2257:1525:731:4300:6100] 12 kph, NO DATA
[SWIMS_INNATE]
[MANNERISM_FINGERS:finger:fingers]
[MANNERISM_NOSE:nose]
[MANNERISM_EAR:ear]
[MANNERISM_HEAD:head]
[MANNERISM_EYES:eyes]
[MANNERISM_MOUTH:mouth]
[MANNERISM_HAIR:hair]
[MANNERISM_KNUCKLES:knuckles]
[MANNERISM_LIPS:lips]
[MANNERISM_CHEEK:cheek]
[MANNERISM_NAILS:nails]
[MANNERISM_FEET:feet]
[MANNERISM_ARMS:arms]
[MANNERISM_HANDS:hands]
[MANNERISM_TONGUE:tongue]
[MANNERISM_LAUGH]
[MANNERISM_SMILE]
[MANNERISM_SIT]
[MANNERISM_BREATH]
[MANNERISM_POSTURE]
[MANNERISM_STRETCH]
[MANNERISM_EYELIDS]
[CASTE:FEMALE]
[FEMALE]
[CASTE_NAME:lamia:lamia:lamia]
[LAYS_EGGS]
[EGG_MATERIAL:LOCAL_CREATURE_MAT:EGGSHELL:SOLID]
[EGG_MATERIAL:LOCAL_CREATURE_MAT:EGG_WHITE:LIQUID]
[EGG_MATERIAL:LOCAL_CREATURE_MAT:EGG_YOLK:LIQUID]
[EGG_SIZE:1140]
[CLUTCH_SIZE:3:4]
[CASTE:MALE]
[MALE]
[CASTE_NAME:naga:naga:naga]
[SELECT_CASTE:ALL]
[SET_TL_GROUP:BY_CATEGORY:HEAD:HAIR]
[PLUS_TL_GROUP:BY_CATEGORY:HEAD:EYEBROW]
[PLUS_TL_GROUP:BY_CATEGORY:EYELID:EYELASH]
[TL_COLOR_MODIFIER:AMBER:1:AUBURN:1:BLACK:1:BROWN:1:BUFF:1:BURNT_SIENNA:1:BURNT_UMBER:1:CHARCOAL:1:CHESTNUT:1:CHOCOLATE:1:CINNAMON:1:COPPER:1:DARK_BROWN:1:DARK_CHESTNUT:1:DARK_TAN:1:ECRU:1:FLAX:1:GOLD:1:GOLDEN_YELLOW:1:GOLDENROD:1:LIGHT_BROWN:1:MAHOGANY:1:OCHRE:1:PALE_BROWN:1:PALE_CHESTNUT:1:PUMPKIN:1:RAW_UMBER:1:RUSSET:1:SAFFRON:1:SEPIA:1:TAN:1:TAUPE_DARK:1:TAUPE_GRAY:1:TAUPE_MEDIUM:1:TAUPE_PALE:1:TAUPE_SANDY:1]
[TLCM_NOUN:hair:SINGULAR]
[TL_COLOR_MODIFIER:GRAY:1]
[TLCM_NOUN:hair:SINGULAR]
[TLCM_TIMING:ROOT:40:0:70:0]
[TL_COLOR_MODIFIER:WHITE:1]
[TLCM_NOUN:hair:SINGULAR]
[TLCM_TIMING:ROOT:70:0:90:0]
[SET_TL_GROUP:BY_CATEGORY:HEAD:EYEBROW]
[TISSUE_LAYER_APPEARANCE_MODIFIER:LENGTH:50:80:90:100:110:120:150]
[APP_MOD_NOUN:eyebrows:PLURAL]
[APP_MOD_DESC_RANGE:55:70:90:110:130:145]
[TISSUE_LAYER_APPEARANCE_MODIFIER:DENSE:50:80:90:100:110:120:150]
[APP_MOD_NOUN:eyebrows:PLURAL]
[APP_MOD_DESC_RANGE:55:70:90:110:130:145]
[TISSUE_LAYER_APPEARANCE_MODIFIER:HIGH_POSITION:0:70:90:100:110:130:200]
[APP_MOD_NOUN:eyebrows:PLURAL]
[SET_TL_GROUP:BY_CATEGORY:EYELID:EYELASH]
[TISSUE_LAYER_APPEARANCE_MODIFIER:LENGTH:50:80:90:100:110:120:150]
[APP_MOD_NOUN:eyelashes:PLURAL]
[APP_MOD_DESC_RANGE:55:70:90:110:130:145]
[SET_TL_GROUP:BY_CATEGORY:HEAD:HAIR]
[TISSUE_LAYER_APPEARANCE_MODIFIER:LENGTH:0:0:0:0:0:0:0]
[APP_MOD_NOUN:hair:SINGULAR]
[APP_MOD_RATE:1:DAILY:0:1000:0:0:NO_END]
[APP_MOD_DESC_RANGE:10:25:75:125:200:300]
[TISSUE_LAYER_APPEARANCE_MODIFIER:CURLY:0:70:90:100:110:130:200]
[APP_MOD_NOUN:hair:SINGULAR]
[TISSUE_LAYER_APPEARANCE_MODIFIER:GREASY:0:70:90:100:110:130:200]
[APP_MOD_NOUN:hair:SINGULAR]
[TISSUE_LAYER_APPEARANCE_MODIFIER:DENSE:50:80:90:100:110:120:150]
[APP_MOD_NOUN:hair:SINGULAR]
[APP_MOD_DESC_RANGE:55:70:90:110:130:145]
[SET_TL_GROUP:BY_CATEGORY:HEAD:HAIR]
[TISSUE_STYLE_UNIT:HAIR:STANDARD_HAIR_SHAPINGS]
[TSU_NOUN:hair:SINGULAR]
[SET_TL_GROUP:BY_CATEGORY:ALL:SCALE]
[TL_COLOR_MODIFIER:BROWN:1:BURNT_UMBER:1:CINNAMON:1:COPPER:1:DARK_BROWN:1:DARK_PEACH:1:DARK_TAN:1:ECRU:1:PALE_BROWN:1:PALE_CHESTNUT:1:PALE_PINK:1:PEACH:1:PINK:1:RAW_UMBER:1:SEPIA:1:TAN:1:TAUPE_PALE:1:TAUPE_SANDY:1]
[TLCM_NOUN:scale:SINGULAR]
[SET_TL_GROUP:BY_CATEGORY:EYE:EYE]
[TL_COLOR_MODIFIER:IRIS_EYE_AMBER:1:IRIS_EYE_AQUA:1:IRIS_EYE_AQUAMARINE:1:IRIS_EYE_ASH_GRAY:1:IRIS_EYE_AUBURN:1:IRIS_EYE_AZURE:1:IRIS_EYE_BLUE:1:IRIS_EYE_BRASS:1:IRIS_EYE_BRONZE:1:IRIS_EYE_BROWN:1:IRIS_EYE_CERULEAN:1:IRIS_EYE_CHESTNUT:1:IRIS_EYE_CHOCOLATE:1:IRIS_EYE_CINNAMON:1:IRIS_EYE_COPPER:1:IRIS_EYE_DARK_BLUE:1:IRIS_EYE_DARK_BROWN:1:IRIS_EYE_DARK_CHESTNUT:1:IRIS_EYE_DARK_GREEN:1:IRIS_EYE_DARK_OLIVE:1:IRIS_EYE_DARK_TAN:1:IRIS_EYE_ECRU:1:IRIS_EYE_EMERALD:1:IRIS_EYE_FERN_GREEN:1:IRIS_EYE_GRAY:1:IRIS_EYE_GREEN:1:IRIS_EYE_JADE:1:IRIS_EYE_LIGHT_BLUE:1:IRIS_EYE_LIGHT_BROWN:1:IRIS_EYE_MAHOGANY:1:IRIS_EYE_MIDNIGHT_BLUE:1:IRIS_EYE_OCHRE:1:IRIS_EYE_OLIVE:1:IRIS_EYE_PALE_BLUE:1:IRIS_EYE_PALE_BROWN:1:IRIS_EYE_PALE_CHESTNUT:1:IRIS_EYE_PERIWINKLE:1:IRIS_EYE_PINE_GREEN:1:IRIS_EYE_RAW_UMBER:1:IRIS_EYE_RUSSET:1:IRIS_EYE_SEA_GREEN:1:IRIS_EYE_SEPIA:1:IRIS_EYE_SKY_BLUE:1:IRIS_EYE_SLATE_GRAY:1:IRIS_EYE_SPRING_GREEN:1:IRIS_EYE_TAN:1:IRIS_EYE_TAUPE_DARK:1:IRIS_EYE_TAUPE_GRAY:1:IRIS_EYE_TAUPE_MEDIUM:1:IRIS_EYE_TAUPE_PALE:1:IRIS_EYE_TAUPE_SANDY:1:IRIS_EYE_TEAL:1:IRIS_EYE_TURQUOISE:1]
[TLCM_NOUN:eyes:PLURAL]
And here's what you'll have to put in body_default to make it work.
[BODY:TAIL_SNEK]
[BP:TAIL:tail:STP][CONTYPE:LOWERBODY][LIMB][CATEGORY:TAIL]
[DEFAULT_RELSIZE:100]
This is the "gaits" they use.
[CREATURE_VARIATION:SNEK_GAITS]
[CV_NEW_TAG:GAIT:WALK:Fastest slither:!ARG4:10:3:!ARG2:50:LAYERS_SLOW:STRENGTH:AGILITY:STEALTH_SLOWS:50]
[CV_NEW_TAG:GAIT:WALK:Faster slither:!ARG3:5:3:!ARG2:10:LAYERS_SLOW:STRENGTH:AGILITY:STEALTH_SLOWS:20]
[CV_NEW_TAG:GAIT:WALK:Fast slither:!ARG2:NO_BUILD_UP:5:LAYERS_SLOW:STRENGTH:AGILITY:STEALTH_SLOWS:10]
[CV_NEW_TAG:GAIT:WALK:Slither:!ARG1:NO_BUILD_UP:0]
[CV_NEW_TAG:GAIT:WALK:Slow slither:!ARG5:NO_BUILD_UP:0]
[CV_NEW_TAG:GAIT:WALK:Creep:!ARG6:NO_BUILD_UP:0]
If you find any bugs, tell me.
Yes, the gender-neutral race name is "snek" because funny.
Update 1:
-Sneks will no longer wear gloves/pants on their tail.
Update 2:
-Snek venom is stronger but has SIZE_DILUTES.
Update 3:
-Removed the tail grasp, apparently [LIMB] allows strangling.
Update 4:
-Finally added SNEK_GAITS to this post (sorry for not doing that before)