40 Fleas of Eastern United States 



1896 Typhlopsylla americana Osborn, United States Dept. Agric. Div. Ent., 

 Bull. V (n.s.), p. 154, figs. 86, 87. 



1904 Ceratophyllus ignotus Baker, Proc. United States Nat. Mus., 27:416, 

 PI. XXI, figs. 1-6. 



1905 Ceratophyllus ignotus Baker, Proc. United States Nat. Mus., 29:134. 



1914 Ceratoohyllus ignotus C. Fox, United States Public Health Ser. Hyg. 

 Lab., Bull. 97, PI. XII, fig. 16. 



1915 Ceratophyllus ignotus Jordan and Rothschild, Ectoparasites, 1:54, 

 fig. 57. 



1929 Ceratophyllus ignotus ignotus Jordan, Nov. Zool., 35:32. 



1930 Ceratophyllus ignottis Jordan, Trans. IV Intern. Cong. Ent. (1928), 

 p. 498, figs. 10, 11. 



1930 Foxella ignotus Wagner, Konowia, 8:314. 

 1933 Foxella ignotus Jordan, Nov Zool., 39:75. 

 1938 Foxella ignotus ignotus Jordan, Nov. Zool., 41:123, figs. 74, 75. 



Male. Preantennal region of the head armed with two rows 

 of bristles, each consisting of four to six. Genal process sharply- 

 pointed. Labial palpus reaching to or almost to the apex of the 

 fore coxa. A series of about twelve small bristles along the 

 posterior edge of the antennal groove. Postantennal region 

 armed with one stout bristle located near the second antennal 

 segment below which are one or two shorter ones, and a mar- 

 ginal row of six to eight long bristles (Plate XI, fig. 55) . Pro- 

 notum with a row of alternating long and short bristles and a 

 ctenidium of ten or eleven spines on a side. Meso- and meta- 

 notum each with two rows of bristles. Each abdominal tergite 

 similarly armed, the bristles long and conspicuous. Modified 

 segments: Process of the clasper more or less triangular, armed 

 at the apex with three bristles. Movable finger long, armed with 

 four long bristles and several shorter ones on the posterior 

 margin. Penis long and wide, terminating in a long curved 

 process; spring long but not completing a turn. Sternite VIII 

 with a long, curved, heavily pigmented bristle. For further 

 details concerning the structure of the male genitalia, see 

 Plate XI, fig. 54. 



Female. Chaetotaxy of the head and general structure es- 

 sentially as in the male. Sternite VII with a deep sinus. Kead 

 of the receptaculum seminis spherical, much wider than the 

 tail (Plate XI, fig. 52) . 



Records. IOWA — Ames, August 8, 1937, on Geomys bursarius 



(Shaw) , three males, three females; Jewell, September 29, 



1938, on Scalopus aquaticus machrinus (Rafinesque) , male; 



Dubuque, November 2, 1937, on Peromyscus leucopus novebo- 



racensls (Fischer) , male (T. Scott) ; November 11, 1934, on same 



