Mallophaga from Birds of Costa Rica, Central .Imcrica 45 



protruding palettes faintly tinged with brown; a brownish band 

 across the forehead, joining the bases of the palettes and bear- 

 ing a row of fine, dorsal hairs ; antennal fossae clear, encircled 

 by a narrow brown. line, except on the inner side where the line 

 expands into a brown band ; a brownish, semicircular band 

 curves from the lateral margin of the head at the base of the 

 palettes upward to the transverse band, and between this and 

 the antennal fossae are large irregular shaped brown blotches ; a 

 narrow, submarginal, occipital band, blackish in the median 

 ])ortion. 



Prothorax the same width as the head at the templar angles, 

 quadrilateral, with anterior and posterior margins concave, the 

 anterior half of the lateral margin straight and the posterior half 

 evenly rounded: lateral angles very obtuse (scarcely noticeable), 

 with a short spine and hair, two more hairs on lateral margin 

 behind the lateral angles ; broad lateral bands of clear brown 

 and a median, longitudinal, ventral patch of paler brown. Meta- 

 thorax scarcely larger than the prothorax, with anterior portion 

 rounded and covered by prothorax ; sides very slightly concave, 

 posterior border truncate and same width as first segment of 

 abdomen ; one slender hair in the posterior angles and a spine 

 in the anterior angles; heavy, brown, lateral bands, passing 

 around on the anterior margin ; brown bands pass diagonally 

 forward from the posterior angles to the median anterior por- 

 tion, broad and pale at base, narrowing and darkening ante- 

 riorly; internal portion of segment dusky brown. Legs of me- 

 dium size, pale fulvous, lighter than body. 



Abdomen rather broad, sides parallel, with the tip abruptly 

 rounded by a portion of the seventh and the eighth segments ; 

 segments of nearly equal width throughout, with transverse pos- 

 terior margins, except the sixth, which is slightly concave; one 

 short hair in the region of the posterior angles of segments one 

 to seven ; eighth with a fringe of short hairs along the round 

 margin ; deep brown, lateral bands on segments one to seven 

 and anterior portion of eighth, heavier along the inner portion 

 and broken by sharply diagonal, clear lines at the sutures; inte- 

 rior of the abdomen an even golden brown, with a slightly darker 



167 



