Mallophaga from Birds of Costa Rica. Central America 63 



hair, lateral margin Hatly rounded with four short hairs ; lateral 

 regions brownish ; a median ventral brown spot, with pitchy- 

 lines running backward to its posterior angles from the antero- 

 lateral margins. Metathorax much larger than prothorax, clear, 

 bands of brown and pitchy ; mesothoracic suture plainly marked ; 

 sides, back of suture, straight, diverging, posterior angles 

 rounded, with one hair and three spine's ; posterior margin flatly 

 rounded with numerous fine hairs ; a pitchy band around ante- 

 rior and lateral margin of mesothorax, broken in median portion, 

 with narrow bands running sligb.tly diagonally backward from 

 the ends to the middle of segment ; a ventral brown blotch at the 

 junction of the pro- and mesothorax and a larger wedge-shaped 

 one in the median portion of metathorax ; brownish bands rv*^ 

 straight backward from margin at mesothoracic suture across 

 the lateral portion of segment and half way across first segment 

 of abdomen, then bend abruptly inward from anterior portion of 

 lateral bands, fading into the median blotch; some brown coxal 

 lines visible, in addition to above. Legs of medium length, 

 clear, with slightly swollen femora and tibiae except the poste- 

 rior tibiae, which are slender and parallel sided ; tibiae brownish 

 at tips. 



Abdomen elliptical, clear, with rounded, projecting, posterior 

 angles, furnished in segments one to seven with three spiny 

 bristles, in eighth with five ; ninth segment large, clear, rounded 

 posteriorly, with three long hairs on each side and a fringe of 

 shorter ones between ; rather narrow, pitchy lateral bands in 

 segments one to eight ; posterior margins of segments with a 

 row of fine hairs ; median transverse bands as follows : a cres- 

 cent-shaped one open behind, extending across portions of first 

 and second segments ; narrow, straight bands, separated by wide, 

 clear sutures, on segments three to six; and a large, somewhat 

 quadrilateral blotch extending from posterior portion of sixth 

 into the anterior portion of the ninth. 



One female and one male collected on Empidonax atriccps, on 

 the volcano Trazu, April, 1902, and one female on Tanagra pal- 

 ment7)i melanopicra. Juan Vinas, Costa Rica, March, 1902. 



This form resembles Col. quadrimaculatnm Car. more than 



185 



