Family Dolichopsyllidae Baker 49 



coxa, usually about as long as the maxillary palpus. Pronotal 

 ctenidium consisting of not less than twelve spines on a side. 

 Males with one long antepygidial bristle and two minute ones 

 on a side; females similarly armed or with three antepygidial 

 bristles on a side of which the middle is the longest. Fifth 

 tarsal segment of each leg armed with five pairs of lateral 

 plantar bristles and an apical submedian pair. 



This genus is represented in the East by seven closely related 

 species all of which have various birds as their normal hosts. 

 While these species are easily distinguished, the characters do 

 not lend themselves well to a key. Males may be readily identi- 

 fied by the shape of the movable finger and the process of the 

 clasper, and females by the form of sternite VII and of the 

 receptaculum seminis. These structures are illustrated in 

 Plates XII to XIV. to which the reader is referred. 



Ceratophyllus celsus Jordan 



(Plate XII, figs. 56, 57) 



1926 Ceratophyllus celsus Jordan, Nov. Zool., 33: 387, fig. 3. 



Male. Upper row of the preantennal region consisting of 

 three or four bristles and several small setae. A series of small 

 setae situated along the anterior and posterior edges of the 

 antennal groove. Postantennal region with three bristles, one 

 much longer than the other two, and a marginal row of four or 

 five bristles of which the most ventral is large and well devel- 

 oped. Pronotum with a single row of bristles and a ctenidium 

 of about fourteen spines on a side. Mesonotum armed with 

 four or five irregular rows of small bristles; metanotum with 

 two or three irregular rows of small bristles. Each abdominal 

 tergite armed with two or three irregular rows of bristles. 

 Some of the abdominal tergites further armed with one to three 

 stout teeth on a side. Modified segments: Process of the 

 clasper long and narrow, at least three times as long as wide at 

 the middle, armed with one long bristle and two much shorter 

 ones at the apex. Movable finger similar in general structure 

 to that of C. niger C. Fox; widest at about the middle where the 

 anterior border is expanded to form a spinelike protuberance; 

 armed on the posterior margin with two or three long bristles 

 and several others of various sizes. Manubrium wide, terminat- 

 ing bluntly. Posterior arm of sternite IX with numerous short 

 robust bristles distally. Sternite VIII armed with six or seven 

 long bristles at the apex and two membranous projections. 

 Penis long and tapering to a fine curved point; spring long and 



