72 MISC. PUBLICATION 5 00, U. S. DEPT. OF AGRICULTURE 



to Wagner (80, p. 6), digitalis Wahlgren and monedulae Wahlgren 

 are synonyms of vagabundus. The present writers have seen no 

 specimens of Wahlgren's species. 



The Genus Ctenophyllus Wagner 



(Fig. 6, A) 



Ctenophyllus Wagner, 1927, Konowia 6: 108. Type, Ceratophyllus armatus 

 Wagner (by subsequent designation). 



Frontal tubercle small to vestigial. Forehead with. 1 2 distinct rows of lateral 

 setae, those of the upper row being thickened and th'ornlike. A third indistinct 

 row may be between these 2 rows. Eyes present, pigmented. Labial palpus 

 5-segmented, not extending beyond apex of trochanter I. Setae on end of 

 antennal segment II in female short. Postantennal region of head with 2 or 

 3 rows of lateral setae. Pronotal comb with less than 24 long, black spines. 

 Femur I with several lateral setae; tibia and tarsal segment I of each leg 

 not hirsute ; coxa III without a row or patch of spinelets on inner surface ; 

 segment I of posterior tarsus shorter than II. III. and IV taken together: last 

 segment of each tarsus with 5 pairs of lateral plantar bristles, the first pair 

 being only slightly, if at all. shifted ventrally ; apieal bristle on segment II 

 of tarsus III not extending beyond apex of segment V. Abdomen with a few 

 apical spines, all of which are dorsal or subdorsal. Tergal plate VII without 

 a posterior median process. Antepygidial bristles on each side of abdomen, 3 

 in female. Female with a single receptaculum seminis. In male, sternal plate 

 VIII large, broad. 



This genus contains four species of rodent-infesting fleas, three of 

 which are Asiatic and one North American. Three of the four 

 species have been found on conies (Ochotona sp.). 



Ctenophyllus terribilis (Rothschild) 



(Fig. 6, A) 



Ceratophi/llus terribilis Rothschild, 1003, Novitates Zool. 10: 317, pi. 9, figs. 1-3. 

 Ctenophyllus terribilis Wagner, 1936, Canad. Eut. 68: 195. 



Type host. — Ochotona prince'ps (Rich.) (cony). 



Cotype localities. — Canadian National Park and Banff, Alberta. 



Range. — Western Canada. 



The original description of terribilis is accompanied by three 

 detail drawings, one of which represents the head and pronotum of 

 the male. 



The Genus Stenistomera Rothschild 



(Fig. 6, D) 



Stenistomera Rothschild, 1915, Novitates Zool. 22 : 307. Monotypic. Type, Typh- 

 lopsylla alpina Baker. 



Frontal tubercle small, almost completely hidden in frontal notch. Front 

 somewhat angulate. Forehead with 3 irregular rows of thickened and darkened 

 setae. Eyes absent. Labial palpus 4-segmented, extending beyond apex of coxa 

 I. Postantennal region of head with 3 rows of setae. Pronotal comb with less 

 than 24 long, black spines. Femur I without lateral setae; each tibia with a 

 posterior, marginal row of heavy, black setae ; coxa III without a row or patch 

 of spinelets on inner surface ; segment I of posterior tarsus longer than II, III, 

 and IV taken together ; last segment of each tarsus with 5 pairs of lateral plantar 

 bristles, the first pair shifted ventrally and situated between the 2 setae of 

 second pair. Abdomen with a few apical spines which are dorsal or subdorsal 

 in position. Tergal plate VII without a posterior median process. Female with 

 3 long, subequal, antepygidial bristles on each side of abdomen ; male with 1 

 long (central) and 2 short antepygidial bristles on each side. Female with a 



