THE FLEAS OF NORTH AMERICA 17 



This substitution of Trichopsylla komoeus Rothschild for T. peni- 

 eilliger Grube as the type of Trichopsylla can hardly hold under Opin- 

 ion 65 of the International Commission on Zoological Nomenclature. 

 The ''special Committee for recommendation as to action," whose re- 

 port was adopted by the Commission and ordered published, stated : 



The Committee is of the opinion that as a specimen is the type of a species, so 

 a species is the type of a genus, and hence that when an author names a par- 

 ticular species as type of a new genus it is to be assumed that it has been cor- 

 rectiy determined. If a case should present itself in which it appears that an 

 author has based his genus upon certain definite specimens rather than upon 

 a species it should be submitted to the Commission for consideration. 



The genus Chaetopsylla is given first place in this work because 

 preference is desired for it over Arctopsylla as the most generalized 

 genus of fleas. The point at issue between the two genera is the num- 

 ber of segments in the labial palpi, there being a smaller number in 

 Chaetopsylla. The most common number of segments in the labial 

 palpi of the more generalized insects appears to be three. In fleas it 

 is five, but four or two are not uncommon. In those genera in which 

 the number of segments has been increased to more than five the 

 evidence of secondary segmentation is easily detected. As pointed out 

 by Tilly ard (7b, p. Jfi)— 



if we examine the labial palpi of those types which possess a large number of 

 palpal segments, we are forced to the conclusion that these supposed segments 

 are actually only secondary annulations of more primitive segments * * *. 



Chaetopsylla floridensis (I. Fox) 



Trichopsylla floridensis I. Fox, 1939, Wash. Ent. Soc. Proc. 41 : 45, pi. 6, fig. 6. 

 Chaetopsylla floridensis Jellison and Good, 1942, U. S. Pub. Health Serv. Natl. 

 Inst. Health Bui. 178: 40. 



Type host. — Unknown. 



Type locality. — Gainesville, Fla. 



Range. — Known only from the type locality. 



The original description of floridensis was based on specimens taken 

 in garden truck leaf mold and is accompanied by a drawing of the 

 male terminalia. This species differs from Chaetopsylla lotoris 

 (Stewart) particularly in the chaetotaxy of the head and met- 

 epimeron. 



Chaetopsylla globiceps (Taschenberg) 



Pulex globiceps Taschenberg, 1880, Die Flohe, p. 66, pi. 2, figs. 10, 10a, and 11. 

 Chaetopsylla globiceps Wagner, 1930, Katalog der palaearktischen Aphanipteren. 

 p. 40. 



Cotype hosts. — Vulpes vulpes (L.) (fox) and Taandea taxus 

 (Schreber) (American badger). 



Type locality. — (?). 



Range. — In North America known only from Greenland, as reported 

 by Meinert (57, p. 187) in 1895. 



Wagner, 1930, gives Pulex vulpes Motschulsky as a questionable 

 synonym. 



The head of Chaetopsylla globiceps is hardly globular or spherical. 

 However, the upper and front margins of the head do make a continu- 

 ous, broadly rounded head outline. Females of globiceps have the 

 abdomen somewhat distended and the receptaculum seminis with a 

 heavily sclerotized, subspherical head and a rather long, sausagelike 

 tail. 



467459 — 43 — —2 



