THE FLEAS OF NORTH AMERICA 73 



single receptaculuni seminis. In male, sternal plate VIII much reduced in 

 width and bearing a pair of stout, pigmented, apical spines ; sternal plate IX 

 reduced, anterior apophysis apparently absent, distal lobes reduced. 



Only a single rare species is included in this genus. In the original 

 diagnosis of Stenistomera^ Rothschild states, "Vestige of eye exceed- 

 ingly slight, without pigment." The present writers have been un- 

 able to find even the "vestige." 



Stenistomera alpina (Baker) 



(Fig. 6, D) 



Typhlopsylla alpina Baker, 1895, Canad. Ent. 27: 189. 

 Stenistomera alpina Rothschild, 1915, Novitates Zool. 22: 307. 



Type host. — "Mountain rat." 



Type locality. — Georgetown, Colo. 



Range. — Known only from Colorado. 



The original description of this species apparently was based on 

 a single male and female, now in the United States National Museum 

 and marked "Types of Typhlopsylla alpina" in Baker's own hand- 

 writing. Stenistomera alpina is clothed in a striking fashion with 

 peculiarly shaped setae or bristles. Each is heavily pigmented and 

 swollen toward the base but drawn out distally into a very fine, al- 

 most invisible filament. Setae of this type are commonly found on 

 sucking lice, particularly those of the genus Hoplopleura, but are 

 rare on fleas. 



The Subfamily UROPSYLLINAE Oudemans 



Head with fronto-epicranial groove poorly developed. Frontal notch and frontal 

 tubercle absent. Eyes usually well developed. Labial palpus with a small 

 number of segments and seldom extending beyond tip of trochanter I. Pronotum 

 with or without comb, and with 1 or 2 transverse rows of setae. Antepygidial 

 bristles present except in the genus UropsyUa. Abdomen in female never greatly 

 distended. 



The subfamily includes at least 10 valid genera of which only 1, 

 Cono rhino psylla Stewart, is represented in North America. 



Uropsyllidae was proposed as a new family by Oudemans (-55, p. 

 326) in 1909 for the single genus UropsyUa Rothschild. It was re- 

 duced to a subfamily in 1929 by Ewing (16, p. 166). 



The Genus Conorhinopsylla Stewart 



(Fig. 4, C) 



Conorliinopsylla Stewart, 1930, Canad. Ent. 62: 178. Monotypic. Type, Conor- 

 hinopsylla stanfordi Stewart. 



Forehead with 2 rows of lateral setae, none of which is spiniform. Eyes 

 vestigial, each in the form of a triangular dark spot. Gena not produced ven- 

 trally to form an acuminate lobe. Labial palpus 6-segmented, extending beyond 

 apex of coxa I but not reaching to apex of trochanter I. Setae on end of 

 antennal segment II short, in male not reaching to middle to club. Postantennal 

 region of head with but 1 row of setae, the posterior, submarginal row, the 

 setae of which are much reduced except for the most ventral one, which is much 

 enlarged. Pronotum with a single row of setae; pronotal comb present, with 

 less than 14 long, black spines. Tarsal segments I and II of leg III densely 

 hirsute with long, hairlike setae on dorsal surface; coxa III without a row or 

 patch of setae on inner surface; last segment of each tarsus with 5 pairs of 



