56 Fleas of Eastern United States 



Ceratophyllus swansoni Liu 



(Plate XIV, figs. 70, 71, 73) 



1935 Ceratophyllus swansoni Liu, Ann. Ent. Soc. America, 28:121, PI. 1, 



figs. 1-3. 

 1937 Ceratophyllus swansoni Jordan, Nov. Zool., 40: 262, fig. 44. 



Male. Upper row of the preantennal region consisting of 

 four to eight bristles, of which four are robust and in line while 

 the others are weak and more or less irregular in arrangement 

 (Plate XIV, fig. 73) . Pronotum armed with about fourteen 

 spines on a side. Other details of general structure as in the 

 other species of the genus. Modified segments: Somewhat 

 similar in appearance to those of C. riparius but differing par- 

 ticularly in the shape of the process of the clasper which is tri- 

 angular or conical, the apex blunt and armed with three 

 bristles. Posterior margin of the movable finger rounded, 

 armed with three stout bristles and several weaker ones. 

 Sternite VIII armed at the apex with two or three stout bristles 

 on a side. Penis slender, ending in a long curved process; spring 

 long, completing one or two turns. For further details concern- 

 ing the structure of the male genitalia, see Plate XIV, fig. 70. 



Female. General structure essentially as in the male. Head 

 of the receptaculum seminis long and slender, much longer than 

 the tail. Sternite VII without a sinus, broadly rounded pos- 

 teriorly. For further details concerning the structure of the 

 female genitalia, see Plate XIV, fig. 71. 



Eastern host. Long-eared Owl (Asio wilsonianus (Lesson) ) . 



Eastern locality. Minnesota. (The above descriptions and 

 the figures were made from a male and female specimen taken 

 from the nest of Asio wilsonianus (Lesson) at Beaverhead 

 County, Montana, (W. L. Jellison) .) 



Type material. Male holotype from Fertile, Minnesota, on 

 Asio wilsonianus (Lesson) in the University of Minnesota Col- 

 lection. Female allotype bearing the same data in the United 

 States National Museum. 



OPISODASYS JORDAN 

 Opisodasys Jordan, 1933, Nov. Zool., 39: 72. 



Genotype: Ceratophyllus vesperalis Jordan 



Eye well developed. Labial palpus extending slightly beyond 

 the apex of the fore coxa. Frontal tubercle small, acuminate. 

 Pronotal ctenidium consisting of ten to twelve spines on a side. 



