AKT. 20 TAXONOMY OF BITING LICE EWING / 



terior marginal setae the longest. Prosternal plate with very long 

 setae. 



Mesothorax about three times as broad as long but with a dis- 

 tinct dorsal suture separating it from the metathorax. Its sides 

 are very strongly divergent, posterior margin outwardly rounded, 

 and it bears no setae above. 



Metathorax over twice as broad as long, its straight, divergent 

 lateral borders being heavily chitinized. 



Abdomen about twice as long as broad; setae forming pleural 

 tufts very long and somewhat flagellate ; marginal setae of last tergite 

 of female much longer toward the sides than in the middle. Basal 

 plate of male genital armature distinctl}?^ platelike, though narrow 



FiGDEB 3. — Dbnntus (Dbnnyus) DUBins (Kellogg). Doesal 

 VIEW OF HEAD AND PEOTHORAX, X 60. (Drawn by Dr. E. A. 

 Chapin) 



and with incurved lateral margins; parameres incurved toward 

 their distal ends so that these touch each other ; endomeres separate 

 and about two-thirds as long as parameres. 



Legs typical; anterior femora as broad as long; patch of setae 

 on each posterior femur extending for about two-thirds the length 

 of the segment ; pseudosegmentation of each tibia ygyj evident. 



Length of female, 2.40 mm.; width, 1.00 mm.; length of male, 

 2.20 mm. ; width, 0.80 mm. 



Type host. — Chimney swift, Chaetura pelagica. 



Types. — In Stanford University Collection. 



Description based upon many adult specimens chiefly from the 

 type host. The}^ have the following data: From Chaetura pelagica 

 Thomasville, Ga., October 7, 1927 (1 male, 2 females) ; from nest of 



