DESCRIPTIONS AND DETERMINATIONS OF SPECIES 57 



VII. 



DESCRIPTIONS OF NEW SPECIES, AND DETERMINATIONS 

 OF OLD SPECIES OF MALLOPHAGA. 



Genus TRICHODECTES Nitzsch. 



Antennae three-segmented ; tarsi with one claw, infesting mammals 

 only. The only genus in the family Trie hod ectidae. 



This genus, as stated above, is found upon a wide variety of hosts. 

 An attempt has recently been made to break it up, Mjoberg having pro- 

 posed a genus, Eutrichophilus, for certain species found upon porcupines 

 and deer. The attempt, however, is not very convincing. There are be- 

 tween fifty and sixty known species, of which twenty-three have been 

 recorded from North America. 



Trichodectes parumpilosus Piaget. 



Trichodectes parumpilosus Piaget, Les Pediculines, p. 397, pi. 32, fig. 5, (1880). 



This species is apparently very common on the domestic horse. We 

 have numerous specimens, and it has previously been reported by Os- 

 born. Another species, T. pilosus Giebel, has also been described from 

 horses, but has not yet been reported from North America. 



Trichodectes scalaris Nitzsch. 



Trichodectes scalaris Nitzsch, in Giebel, Ins. Epiz., p. 61, pi. 3, fig. 7, 9, (1874). 



Occurs on domestic cattle. It has been reported by Osborn, and we 

 also have specimens. 



Trichodectes climax Nitzsch. 



Trichodectes climax Nitzsch, Germar's Mag., vol. 3, p. 296, (1818). 



Trichodectes limbatus Gervais, Hist. Ins. Apteres, vol. 3, p. 313, pi. 7, fig. 1, (1848). 



An extremely common parasite of domestic goats. Another species, 

 T. limbatus Gervais, has also been described from goats ; but we are in- 

 clined to believe with Osborn that the two species are identical. 



