THE FLEAS OF NORTH AMERICA 65 



Range. — Known only from Alberta. 



According to Jordan's original description of systalta, the movable 

 finger of the male is "somewhat narrower than in the previous sub- 

 species [wagneri] , and its anterior margin more incurved." A figure 

 of the female genitalia accompanies the original description. 



Trichopsylla (Trichopsylla) wagneri wagneri (Baker), new combination 



Ceratophyllus wagneri Baker, 1904, U. S. Natl. Mus. Proc. 27: 405, pi. 15, 



figs. 4-7. 

 Ceratophyllus peromysci Stewart, 1928, Canad. Ent. 60: 148, pi. 3, figs. 1-2. 

 Megaoothris wagneri I. Fox, 1940, Fleas of Eastern United States, p. 71, pi. 19. 



figs. 96-97. 



Type host. — Peromyscus leucopus (Raf.) (white-footed mouse). 



Type locality. — Moscow, Idaho. 



Range. — The species occurs in the western part of the United States 

 and Canada. This particular subspecies has been indicated by Jordan 

 (40) in 1929 as occurring in British Columbia, Idaho, Wyoming, and 

 western Montana. I. Fox (1940) reported it from Iowa. 



The original description of wagneri was based on two males, one 

 of which came from the type host and one from the house mouse. 

 A description based on both sexes, and accompanied by figures, has 

 been given by I. Fox (1940). In the type subspecies the movable 

 finger of the clasper is intermediate in width between that of the 

 other two subspecies, and the head of the receptaculum seminis is 

 less differentiated from the tail. 



The Subgenus PLEOCHAETIS Jordan 



Pleochaetis Jordan, 1933, Novitates Zool. 39: 77. Type, Ceratophyllus mundus 

 Jordan and Rothschild (by original designation). 



Eyes well pigmented. Bristles on segment II of antenna short, in female not 

 reaching apex of club. Forehead with 2 or 3 rows of lateral setae ; postan- 

 tennal region with 2 or more bristles behind base of antennal groove and 3 

 or more near middle of region. In male, sternal plate VIII slender, of vary- 

 ing length, with 1 or more snbapical bristles and sometimes with membranous 

 flap. In female, stylet with 1 or 2 lateral bristles and head of receptaculum 

 seminis subglobular to oblong. 



This subgenus is best differentiated from the type subgenus by the 

 chaetotaxy of the head, the middle and upper rows of lateral bristles 

 on the forehead being well represented in some species of Pleochaetis 

 and poorly represented or not represented in Trichopsylla. The male 

 terminalia in Pleochaetis tend to unite the two types found in the 

 type subgenus. Pleochaetis is essentially a Neotropical group, but 

 extends northward into Arizona. 



Trichopsylla (Pleochaetis) dolens (Jordan and Rothschild), 

 new combination 



Ceratophyllus dolens Jordan and Rothschild, 1914, Novitates Zool. 21: 257, 

 figs. 1-2. 



Type host. — Sciurus hoffmanni (Peters) (squirrel). 

 Type locality. — Irazu, Costa Rica. 

 Range. — Known only from Costa Rica. 



467459—43 5 



