Mallophaga from Birds of Costa Rica. Central America 31 



Abdomen short, oval, with the first segment much wider than 

 any of the others, and the seventh aborted (not extending to the 

 lateral margin of the abdomen) ; lateral margins of the segments 

 convex and the posterior angles of first and second segments 

 with one short hair; the third, fourth, and fifth with two hairs, 

 the sixth with three, and the eighth with a fringe of about twelve 

 hairs on each side ; tip of eighth segment slightly indented ; a 

 broad submarginal, darker band completely encircling the abdo- 

 men, with the enclosed portion much clearer than the remainder 

 of the body ; a stout, slightly pustulated hair on the posterior 

 margin of segments one to five, just inside the lateral band ; 

 seventh segment with a fringe of about twelve short, weak hairs 

 along the posterior margin. Legs short and stout ; tarsi aborted ; 

 tibiae almost as large as femora ; claws long and stout. 



The male is slightly smaller than the female, measuring, length 

 ^2.41 mm., width 1.14 mm. Head, length .yy mm., width .83 mm. ; 

 the hairs of the temples, thorax, and abdomen longer and stouter 

 than in the female ; abdomen more nearly orbicular ; seventh 

 segment of the abdomen appearing as two lobes, one on each 

 side of the eighth, which is narrower than in the female, with 

 sides deeply emarginate and tip deeply concave ; the fifth seg- 

 ment with three hairs in the posterior angle ; the sixth with four, 

 the seventh with six, and the eighth with three short hairs in 

 each angle and four slightly longer, submarginal ones on each 

 side of the middle ; the genitalia are simple, curving slightly 

 inward, and about half the length of the eighth segment. 



KELLOQQIA nov. ^en. 



Body short, compact, and with the general appearance of Gon- 

 iocotes, with the exception of the thorax ; head of medium size, 

 thorax small ; antennae small, without appendages and similar in 

 the two sexes ; trabeculae entirely absent ; whole thorax small. 

 much smaller than the first segment of the abdomen ; meso- and 

 metathorax separated by a distinct suture ; metathorax narrower 

 than mcsothorax, and completely divided into two lobes by a 

 longitudinal suture ; abdomen diflfering greatly at the tip in the 

 sexes; female with seven segments, male with eight but with 



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