TWO NEW GENERA OF MALLOPHAGA. 9 I 



Head small in comparison with rest of body, hardly as wide as meso- 

 thorax, with flatly rounded front, no orbital sinus, temples slightly swollen, 

 rounded, but with postero-lateral angle slightly obtusely produced, occipital 

 margin slightly curving ; eyes divided so as to give the effect of one pair on 

 each side ; antennae short, slender, tapering ; pustulated hairs on temporal 

 margins and two small hairs with large pustulation on dorsal surface of each 

 temple, also four smaller pustulations on postero-median dorsal surface, and 

 one mesad from each eye pair ; color chestnut-brown with blackish eye 

 flecks arid dark brown markings along temporal margin and in postero- 

 mesial angles of each temporal region. 



Thorax of three distinct segments regularly widening posteriorly, the 

 meta-segment being nearly as wide as first (widest) abdominal segment and 

 resembling an abdominal segment ; prothorax with slight median angulated 

 point on anterior margin, with parallel straight lateral margins and rounded 

 antero-lateral and postero-lateral angles, anterior half dark brown, posterior 

 half light brown ; mesothorax with diverging lateral margins, small pustu- 

 lated hairs in angles and flatly rounding posterior margin : anterior four 

 fifths of segment dark brown with series of weak hairs in demi-pustulations 

 along the hind margin of this dark region ; metathorax with diverging 

 lateral margins, and with large lateral transverse dark brown blotches leav- 

 ing a rather narrow light brown median space. Legs with heavy short 

 femora and long slender tibiae with few short, weakly pustulated spiny hairs 

 on each segment ; two terminal tibial spines ; femur darker than the trans- 

 lucent pale brown tibiae. 



Abdomen forming with meso- and metathorax an ellipse ; segments i 

 and 2 widest and others tapering slowly posteriorly ; hairs few and incon- 

 spicuous ; segments 1-5 with conspicuous spiracles each showing as a 

 small brown spot in a large clear circular pustulation ; segments 1-4 with 

 large lateral transverse dark brown blotches leaving a lighter median space 

 which is narrower on each successive segment posteriorly : segments 5-7 

 with dark-brown transverse bands extending clear across body ; all trans- 

 verse blotches and bands blacker and slightly wider at lateral ends, with 

 slight anteriorly projecting process ; indications of demi-pustulations in 

 lateral portions of posterior margin of each blotch and band ; posterior 

 margin of terminal segment flatly rounded, and longest hairs of the body 

 in lateral angles. 



NOTE. In a paper published while this paper was in press, on the Mallophaga 

 from Birds of Costa Rica (Univ. Studies, Vol. 3, pp. 123-197, 1903, Univ. Nebraska) 

 M. A. Carriker, Jr., describes two new genera of Mallophaga, under the names Or- 

 nicholax and Kelloggia. 



