NEW MALLOPHAGA. 49 1 



Head, length .37 mm., width .28 mm.; elongate-con- 

 ical, with narrow truncate front; two very small marginal 

 hairs near the front, and one slightly longer a little dis- 

 tance in front of the trabecule which are small but dis- 

 tinct; eye flat, with a prickle in its posterior margin; 

 temporal margins flat with a long hair and a prickle ; pale 

 golden brown with dark brown narrow antennal bands 

 and temporal borders; oral fossa elongate, expanded be- 

 hind, nearly uncolored. 



Prothorax short, small, oblong, with single short hair 

 in posterior angle, and even lateral borders which bend 

 inward along posterior margin. Metathorax trapezoidal, 

 with lateral margins converging anteriorly; posterior mar- 

 gin straight or weakly convex on abdomen, more curved 

 at each end which projects laterally beyond the abdomen; 

 posterior margin with six longish but weak hairs on each 

 lateral third; indistinct lateral borders with anterior ends 

 more distinct and a diagonal line projecting inward and 

 forward from the posterior angles. No pronounced ster- 

 nal markings. Legs pale, concolorous with body, with 

 narrow darker marginal markings. 



Abdomen very long and apparently slender, although 

 really one-third wider than head; abdominal segments 

 very gradually growing wider until segment 6 is reached, 

 segment 7 slightly narrower, segments 8-9 narrower, ab- 

 ruptly tapering; a single short hair in posterior angles of 

 segments; dorsal surface naked; segments 1-7 w T ith dis- 

 tinct chestnut brown lateral bands; segment 8 of general 

 body color; segment 9 uncolored, emarginated behind, 

 with rounded points. 



Male. Two males, which with much hesitancy I as- 

 sign to this species, taken from a Cliff Swallow, Petroch- 

 elidon lunifrons (Palo Alto, California), are much smaller 

 than the females. This condition is similar to that pre- 



