80 Fleas of Eastern United States 



ATYPHLOCERAS JORDAN AND ROTHSCHILD 

 Atyphloceras Jordan and Rothschild, 1915, Ectoparasites, 1:59. 



Genotype: Ceratophyllus multidentatus C. Fox 



Genal ctenidium absent; pronotal ctenidium present. Eye 

 reduced. Labial palpus consisting of five to eight segments. 

 Abdominal tergites I to VI with two to seven lateral teeth on 

 a side. Three antepygidial bristles present on a side. Fifth 

 tarsal segment of each leg armed with five pairs of lateral 

 plantar bristles. Females with two receptacula seminis. 



This genus is represented in the East by a single rare species 

 which is found on small mammals. 



Atyphloceras bishopi Jordan 

 (Plate XXI, figs. 105, 109) 

 1933 Atyphloceras bishopi Jordan, Nov. Zool., 39:63, figs. 11, 12. 



The following description and the accompanying illustrations 

 are taken from Jordan's original descriptions as no specimen 

 has been available for study. 



Male. Distinguished from A. multidentatus C. Fox (Cali- 

 fornia) and A. echis J. and R. (Arizona) by the tubercle of the 

 frons being more distant from the anterior oral angle, by 

 the labial palpus consisting of five segments, instead of six or 

 more, and by the posterior abdominal segments. Distance of 

 the frontal tubercle from the anterior oral angle twice as long 

 as in other known species of the genus. Postantennal region of 

 the head with four rows of bristles, of which the second consists 

 of only one or two bristles. Labial palpus reaching to the apex 

 of the fore coxa. Each abdominal tergite armed with three rows 

 of bristles; tergites I-VI further armed with apical teeth (on the 

 two sides together) as follows: 8, 12, 9, 7, 6, 2. Modified seg- 

 ments: Process of the clasper conical with five or six bristles at 

 the apex and posterior margin and five or six small ones later- 

 ally and dorsally, on the inner side of the apex a stronger 

 bristle. Movable finger long and broad. Posterior arm of sternite 

 IX narrow, slightly widened at the apex, where it is armed with 

 a number of bristles of various sizes. For further details con- 

 cerning the structure of the male genitalia, see Plate XXI, 

 fig. 105. 



Female. Abdominal tergites I-VI armed with apical teeth 

 (on both sides together) as follows: 8. 13, 8, 8, 5, 2. Other 



