DESCRIPTIONS AXD DETERMINATIONS OF SPECIES 59 



virginianus. We have specimens from ''red deer," (Michigan). It may 

 easily be distinguished from T. tibialis by the abdomen, which is slender 

 and much narrower than the head. 



Trichodectes (Eutrichophilus) mazama Stobbe. 



Eufrichophilus mexicanus Mjoberg, Arkiv. for Zoologi, vol. 6, pp. 79-82, (1910). 



Specific name preoccupied. 

 Eutrichophilus mazama Stobbe, Deut. Ent. Zeit., p. 562, (1913). 



Described from specimens in the Hamburg Zool. Mus. taken from 

 Cervus mexicana (Mexico). It apparently differs from the two preced- 

 ing species chiefly in the very large first antennal segment of the male. 



Trichodectes (Eutrichophilus) setosus Giebel. 



Trichodectes setosus Giebel, Ins. Epiz., p. 56, (1874). 



Eutrichophilus setosus Mjoberg, Arkiv. for Zoologi, vol. 6, p. J$, (1910). 



This species is apparently common to the porcupines of both Europe 

 and America. Osborn has recorded it from Erethison dorsatum (Ne- 

 braska), and we have specimens from Erethison epixanthum (California 

 and Alaska). Mjoberg has described three species, T. (Eutr.J minor, T. 

 (Eutr.J cordiceps, and T. (Eutr.J cercolabes, all from Coendu (Cercola- 

 besj prehensilis, a South American porcupine. It is indeed most extraor- 

 dinary to find three closely related species of Mallophaga upon the same 

 host, and Neumann is of the opinion that they are merely forms of T. se- 

 tosus. Stobbe, however, has examined Mjoberg's material, and in addi- 

 tion to agreeing with Mjoberg has added still a fourth species from 

 another host of the same genus. In addition to these there is still a fifth 

 species, T. mexicanus Rudow from Coendu novae-hispaniae , making five 

 species described from the same host genus and six from this one small 

 family. It is all rather bewildering. 



Trichodectes mexicanus Rudow. 



Trichodectes mexicanus Rudow, Zeit. f. ges. Naturw., vol. 2j, pi. 6, fig. 2, (1876). 

 From Coendu (Cercolabes) mexicanus, a Mexican porcupine. 



Trichodectes (Eutrichophilus) coendu Stobbe. 

 Eutrichophilus coendu Stobbe, Ent. Zeit., pp. 566-567, (1913)- 



From Coendu novae-hispaniae , a Mexican porcupine. 



