Mallophaga from Birds of Costa Rica, Central America 9 



portion of segments. Metathorax scarcely longer than prothorax, 

 pentagonal, with convex, widely diverging sides and angulated 

 posterior margin ; posterior angles with one short hair, and pos- 

 terior margin with a row of ten short, pustulated hairs on each 

 side ; deep clear brown lateral bands, widening posteriorly ; a 

 pitchy brown band around posterior border, slightly submarginal 

 in median portion ; meso-coxal bands visible. Legs stout, femora 

 and tibiae swollen at the tips ; clear, with bases and tips of femora 

 annulated with pitchy; a pitchy band along posterior border of 

 tibiae, and tips annulated with brown. 



Abdomen broadly oval, with lateral margins of segments more 

 or less convex and the rounded posterior angles protruding, with 

 one hair in segments two to eight and one in anterior portion of 

 segments five to seven ; a row of hairs across the middle of seg- 

 ments one to seven, pustulated along posterior margin of trans- 

 verse bands ; narrow, pitchy, lateral bands on segments one to 

 eight, separated by a small clear spot in posterior angles ; clear 

 brown, lateral transverse bands, extending inward one-third the 

 width of abdomen, narrowing inwardly, with a large, round, 

 clear area just within the lateral bands and a darker oval spot 

 near the inner ends ; a large, round, ventral, brown patch cover- 

 ing the apical portion of the abdomen ; two median brown spots 

 on the eighth segment and the tips of the ninth brownish. 



Male. — Body, length 1.61 mm., width .62 mm.; head, length 

 .63 mm., width .55 mm. ; very similar to female, except the 

 shorter, rounder abdomen ; genitalia short, stout, deep brown. 



Numerous males and females collected on Psilorhiniis mexi- 

 canus, at Juan Vinus, Costa Rica, March, 1902. This form is of 

 the type of D. rotundus Piag. and corvi Osb., but is easily distin- 

 guished from corvi by the slightly fuscus color and dark brown, 

 instead of pitchy markings, and from rotundus by the absence of 

 lateral angles in the prothorax and by the double occipital bands ; 

 also female is much larger. 



Oocophorus communis N. 



Nitzsch, Germar's Mag. of Ent., 1818, vol. Ill, p. 290. 



Kellogg, New Mallophaga II, 486, pi. LXVI, fig. 7. 



Large numbers of this type of Docophorus collected on a great 



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