Mallophaga from Birds of Costa Rica, Central America 33 



hairs ; the median posterior margin rounded ; the postero-lateral 

 margins concave, with two stout hairs ; metathorax much nar- 

 rower than mesothorax, extending completely over the first seg- 

 ment of the abdomen ; divided into two distinct lobes by a longi- 

 tudinal suture ; posterior tips of lobes bluntly pointed. 



Abdomen short, thick, narrowing gradually from first seg- 

 ment to the rounded point ; first segment much broader than the 

 others; segments two to six projecting under adjacent anterior 

 segments at their lateral portions; segments one to six with broad 

 lateral bands, seventh entirely colored, while the median portion 

 is almost entirely uncolored; segments one to five with one long 

 and one short hair in the posterior angles, segment six with 

 three hairs and segment seven with four weak, slender hairs on 

 each side of tip ; a long, stoub» dorsal hair on each side of the 

 posterior margin of segments one to five, nearly to the inner 

 margin of the lateral bands ; dorsal surface of thorax and abdo- 

 men strongly, though not closely, punctured. 



Legs short and stout, concolorous with body. 



The male differs slightly from the female, especially in the 

 tip of the abdomen. 



Measurements of male, length 1.76 mm., width .88 mm.; head, 

 length .6 mm., width .65 mm. ; the hairs of the thorax and 

 abdomen are longer and stouter; sixtli-segment of abdomen very 

 wide (longitudinally), almost as wide as the first; seventh seg- 

 ment much aborted, appearing as two lobes, one on each side of 

 the eighth, which is deeply inserted into the sixth; segments 

 four to seven with three hairs in the posterior angles ; eighth 

 with one very long and two short hairs at each angle, and the tips 

 slightly indented. 



Goniodes minutus sp. nov., pi. IV, figs. 1 and 2 



Male. — Body, length .96 mm., width .49 mm. ; short and ro- 

 bust, head large, translucent golden brown throughout, with 

 darker smoky brown frontal band, and lateral bands on thorax 

 and abdomen. 



Head, length .28 mm., width .39 mm. ; quadrilateral, front 

 broad and flatly rounded ; sides nearly straight, slightly diverg- 



155 



