Mallopliaga from Birds of Costa Rica, Central America 21 



intense in region of posterior angles ; posterior margin with a 

 clear border. Legs stout, with femora narrowly edged with 

 dusky anteriorly. 



Abdomen oval, widest at fourth and fifth segments ; posterior 

 angles acute, but scarcely projecting, with one hair in third and 

 fourth segments, two in five and six, three in seven, two on each 

 side, and two longer pustulated ones on posterior margin of 

 eighth, and a pustulated one in the anterior angles of the ninth ; 

 lateral bands absent ; clear, pale, brown bands across the posterior 

 portion of segments one to eight, darker, and extending to an- 

 terior margin of segment in the median portion, and separated 

 transversely by broad clear sutures; ninth segment small, 

 rounded, indented, at the tip and pale brown; two long dorsal 

 hairs in the median anterior portion, and a transverse row of six 

 across the median portion of first segment; segments two to 

 seven with a median transverse row of nine slender hairs, all 

 with only very faint, small pustules or none ; clear pustules in 

 regions of spiracles, on segments two to seven. 



A single female collected on Pezopetes capitalis, on the vol- 

 cano Irazu, February, 1902. 



The finding of this fiiscus-Wkt species on a Tanagradae is 

 about as inexplicable as the taking of N. curvilineatus on Neso- 

 pelia galapagoensis, but there was absolutely no chance of strag- 

 gling from a Raptor, since none were killed in that locality on 

 that trip. The present species is easily recognized by the fiiscus- 

 like head, the absence of lateral abdominal bands, and the pale 

 continuous transverse bands. 



Nirmos bracliy thorax ptiliogonis var. nov. 



Nirmus brachytJiorax Gieb., Insecta Episoa, p. 134. 

 Nirinits hrachythorax Piaget, Les Pediculines, p. 150, pi. 

 XII, fig. 8. 



Female. — Body, length 1.61 mm., width .38 mm. 



These specimens really come much nearer to Piaget's N. 

 hrachythorax cedrortim than to hrachythorax, but since that form 

 is a variety, I will make this another variety, but will compare 

 it with the var. cedrorum. 



143 



