66 MISC. PUBLICATION 5 0, IT. S. DEPT. OF AGRICULTURE 



The original description of this species was based on a single 

 male and female. It is accompanied by figures of the male and female 

 terminalia. 



Trichopsylla (Pleochaetis) graphis (Rothschild), new combination 

 Ceratophyllus graphis Rothschild, 1909, Novitates Zool. 16: 62, pi. 10, figs. 3-4. 



Type host. — Sciurus deppei Peters (squirrel). 



Type locality. — Nicara gua . 



Range. — Known only from Nicaragua. 



The original description of graphis is accompanied by a drawing of 

 the terminalia of each sex. The movable finger of the clasper bears 

 three large, subequal, dark bristles. 



Trichopsylla (Pleochaetis) mundus (Jordan and Rothschild), 

 new combination 



Ceratophyllus mundus Jordan and Rothschild, 1922. Ectoparasites 1 : 272, fig. 266. 



Type host. — "Field mouse (rato de campo)." 



Type locality. — "Facubaya," Mexico. 



Range. — Known only from Mexico. 



This very small flea (length of male "1.9 mm.") was described from 

 a single male. The original description is accompanied by a drawing 

 of the male terminalia. 



Trichopsylla (Pleochaetis) sibynus (Jordan), new combination 

 Ceratophyllus sibynus Jordan, 1925, Novitates Zool. 32: 110, fig. 42. 



Type host.— "Skunk." 



Type locality. — Paradise, Ariz. 



Range. — Southwestern part of the United States and northern 

 Mexico. 



This is a small flea. The movable finger of the clasper bears a row 

 of five stout, darkened, submarginal setae, the uppermost of which 

 is the longest, the lowermost the shortest and stoutest; while the 

 other three are almost subequal in length, each being slightly longer 

 than the lowermost. A specimen of sibynus in the United States Na- 

 tional Museum was taken in the Mogollon Mountains, N. Mex. 



The Genus Ceratophyllus Curtis 



(Fig. 7, E) 



Ceratophyllus Curtis, 1829, A Guide to an Arrangement of British Insects, 

 Column 201, No. 1136; 1832, British Entomology, v. 9, No. 417; Jordan, 

 1933, Novitates Zool. 39: 75. Type, Ceratophyllus hirundinis Curtis (by 

 original designation). 



The generic name Ceratophyllus was first used by Curtis in 1829, 

 but the genus itself was not described until 1832. For almost a cen- 

 tury after its establishment it included a large percentage of all the 

 species of fleas. Ceratophyllus is here used as it was redefined in a 

 restricted sense by Jordan in 1933. 



Frontal tubercle small to minute, angulate at apex. Forehead frequently with 

 2 complete rows of lateral setae; third row never complete. Eyes black, not 

 reduced. Labial palpus not extending beyond tip of coxa I. Setae on antennal 

 segment II of female extending beyond apex of club. Postantennal region of 



