68 MISC. PUBLICATION" 5 00, U. S. DEPT. OF AGRICULTURE 



Type locality. — Island of Saint Kilcla, Scotland. 



Range. — In Xorth America known only from west Greenland. 



The original description of borealis, based on a single female, is 

 accompanied by a drawing of the terminalia. The species is said 

 to be particularly characterized by the shape of the seventh sternal 

 plate of the female: "This is truncate, with the upper angle pro- 

 duced into a Jobe." 



Ceratophyllus celsus apricus Jordan 

 Ceratophyllus celsus apricus Jordan, 1929, Novitates Zool. 35: 37, pi. 2, fig. 24. 



Type host. — Petrochelidon fulva cavicola Bar. and Brooks (cliff 

 swallow). 



Type locality. — Soledad, C'iba. 



Range. — Known only from Cuba. 



There are several evident differences between apricus and the 

 typical subspecies of celsus. The process of the clasper is not so 

 slender in apricus, and it is of a different shape and bears a large 

 bristle at the apex. Also in apricus there are three large bristles along 

 the posterior margin of the movable linger instead of two. Type 

 specimens (male and female) of this subspecies are in the United 

 States National Museum. 



Ceratophyllus celsus celsus Jordan 



Ceratophyllus celsus Jordan, 1926, Novitates Zool. 33: 3S7, fig. 4; I. Fox, 1940, 

 Fleas of Eastern United States, p. 49, pi. 12, figs. 56, 57. 



Type host. — Riparia riparia (L.) (bank swallow). 



Type locality. — Okanagan Falls, British Columbia. 



Range. — The species is known from the United States, Canada, 

 and Cuba. This subspecies occurs only in the United States and 

 Canada. 



The original description of celsus was based on a single male and 

 is accompanied by a drawing of the clasper. I. Fox (1940) pub- 

 lished a redescription of the subspecies based on both sexes and 

 accompanied by figures. 



Ceratophyllus diffinis Jordan 



Ceratophyllus diffinis Jordan, 1925, Novitates Zool. 32: 111, fig. 44; I. Fox, 



1940, Fleas of Eastern United States, p. 50, pi. 12, figs. 58, 59. 

 Ceratophyllus rilcyi Liu, 1935, Ent. Soc. Amer. Ann. 28: 123, pi. 1, figs. 4-6. 



Type host. — Colymbus hoTboelli (Rein.) (grebe). 



Type locality. — Okanagan Falls, British Columbia. 



Range. — United States and Canada. 



The original description and detail figure of diffinis were based on 

 a single male. A redescription of the species, based on both sexes, is 

 given by I. Fox (1940). Closely related to Ceratophyllus diffinis is 

 C. garei Rothschild, but diffinis differs from the latter in having a 

 broader paramere and in the chaetotaxy of the movable finger. 



