Mallophaga from Birds of Costa Rica, Central America 2g 



Abdomen oval, slightly clavate ; posterior angles rounded, pro- 

 jecting, with from one to three short hairs ; segments one to 

 seven with rather broad, smoky fulvous, lateral bands, whose 

 anterior portion extends inward, forming a rounded, backward- 

 curving protuberance, almost obscured by the narrow, pitchy, 

 transverse bands, widening and fading inwardly ; eighth seg- 

 ment clear, rounded and indented, bearing one and two short 

 hairs on each side of the tip. 



Male. — Body, length 1.38 mm., width .64 mm.; head, length 

 .43 mm., width .62 mm.; differs from female in having long 

 pitchy ocular blotches extending backward from the eye ; a 

 shorter, thicker abdomen, more abruptly rounded posteriorly, 

 with the last segment smaller, less protruding, with a fulvous 

 band around the flatly rounded posterior margin ; genital hooks 

 long, slender, and almost parallel. 



Numerous males and females collected on Odontophortis gtit- 

 tatus, on the Volcano Irazu, Costa Rica, April, 1902. It is of the 

 general type of G. major Piag., but it is easily distinguished 

 from that species by the heavy occipital bands and the wide 

 diverging prothorax. 



ORNICHOLAX nov. gen. 



Body short, compact, head large, and with the general appear- 

 ance of Goniocotes ; antennae small, without appendages, and 

 similar in the two sexes ; trabeculae large, triangular, movable ; 

 prothorax small, short ; mesothorax large, broad as head, and 

 separated from metathorax by a very distinct suture ; metathorax 

 much narrower than the mesothorax and plainly divided into 

 two lobes by a longitudinal, clear suture; abdomen of both sexes 

 with lateral bands, with but eight segments and with the seventh 

 much aborted ; legs very short and stout ; dorsal surface of the 

 thorax and abdomen thickly and deeply punctured. 



Found as yet only on Tinamiis rohnstus, but is probably com- 

 mon to the Crypturi, 



Ornicholax robustus n. sp., pi. IX, figs. 1-1^ 



Two male specimens and one female taken on Tiiiamus robus- 

 tus, at Pozo Azul, Costa Rica, June, 1902. This is a strikingly 



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