1963] 
Causey — Mexiterpes sabinus 
239 
3. About 5 ocelli are in a single curved series; body is lightly pig- 
mented Flagellopetalum Causey 
Ocelli are in 2 or 3 irregular series; body is depigmented. 
Trichop etalum Harger 
4. 14 or 15 ocelli are in a triangular patch; body is either pigmented 
or depigmented; prefemur of posterior gonopods is prolonged 
well beyond its articulation with the smaller femur 
Trigenotyla Causey 
No ocelli; body is depigmented; prefemur of posterior gonopods 
is not prolonged beyond its articulation with femur 5 
5. Legpair 7 of male is greatly enlarged Zygonopus Ryder 
Legpair 7 of male is enlarged either slightly or not at all 6 
6. Legpairs 3 through 7 of male have no special modification; a 
partition is between coxa and prefemur of posterior gonopods 
Mexiterpes, new genus 
One or more of legpairs 3 through 7 of male are modified ; no 
partition is between coxa and prefemur of posterior gonopods 
Scoterpes Cope 
Literature Cited 
Causey, Nell B. 
1960. The troglobitic milliped genus Zygonopus (Chordeumida, Cono- 
tylidae, Trichopetalinae) . Jour. New York Ent. Soc., 68:69-80, 
figs. 1-11. 
Chamberlin, R. V. 
1942. On centipeds and millipeds from Mexican caves. Bull. Univ. 
Utah, biol. ser., 7(2) :1-19, 2 pis. 
Chamberlin, R. V., and Richard L. Hoffman 
1958. Checklist of the millipeds of North America. U. S. Nat. Mus. Bull. 
212, pp. 1-236. 
