THE FLEziS OF NORTH AMERICA 27 



abdomen in both sexes. Female with but 1 receptaculum seminis. In male, 

 sternal plate VIII produced posteriorly into a semihyaline flap; sternal plate 

 IX produced posteriorly into a spiniferous and setiferous process; movable 

 finger of clasper broad at base and angulate apically, bearing several to many 

 small setae. 



This genus is confined to northern North America, the most south- 

 ern locality being San Francisco. A key to the males and females, 

 before DefoteJis was split off, was published by Ewing (i,\ p. 126) in 

 1929. 



Catallagia borealis Ewing 



Catallagia borealis Ewing. 1929, Wash. Biol. Soc. Proc. 42: 127. 



Type host. — Microtus pevmsyloanicus (Ord) (meadow mouse). 



Type locality. — Basin Pond. Mount Katahdin. Maine. 



Range. — Known only from Maine. 



At the time of its description this species was known only from a 

 single female. CataUagia onaga Jordan may possibly be a synonym 

 of borealis. The head of the female and sternal plate VII of the 

 same sex have been figured by I. Fox (25, pi. 28, figs. 146 and 147). 



Catallagia chamberlixi Hubbard 



CataUagia chamberlini Hubbard, 1940, Pacific Univ. Bui. 37 (3) : [4], 3 figs. 



Type host. — ( ?). "Normal host is the Deer mouse.'" 



Type locality. — Rocky Point (north of Klamath Falls). Oreg. 



Range. — Given by Hubbard (31) as "Cascade and Siskiyou Moun- 

 tains of Oregon, with encroachments into the Willamette Valley.' 5 



The original description of this species was based on 25 specimens 

 and is accompanied by a drawing of the ninth sternal plate of the 

 male, the characters of which are distinctive. 



Catallagia charlottensis (Baker) 



(Fig. 5, C) 



TyphlopsyUa charlottensis Baker, 1898, X. Y. Ent. Soc. Jour. 6: 56. 



CataUagia charlottensis Rothschild, 1915, Ectoparasires 1: 43, figs. 44 and 46. 



Type host. — ''Mouse nest/ 5 



Type locality. — Massett. Queen Charlotte Islands. 



Range. — Known from British Columbia, Alberta, and Oregon. 



This species, the type of its genus, was redescribed and the geni- 

 talia of the male figured by Rothschild (1915). It is very closely 

 related to decipiens Rothschild. (See remarks under the latter 

 species.) 



Catallagia decipiens Rothschild 



CataUagia decipiens Rothschild, 1915, Ectoparasites 1 : 43, figs. 45 and 47. 



Type host. — Peromyscus sp. (white-footed mouse). 



Type locality. — Horse Creek, Upper Columbia Valley, British 

 Columbia. 



Range. — Known from British Columbia. Alberta, and the Great 

 Basin of the western part of the United States. 



This flea is very similar to charlottensis, from which it can best be 

 separated on characters of the malo genitalia. In decipiens the proc- 



