68 71/. A. Carnkcr 



margins concave; posterior margin llatly rounded, with six hairs; 

 one faint coxal hand visible on each side. Metathorax larger 

 ihan prothorax, with almost straight diverging sides and very 

 flatly convex posterior margin, set with a row of fine hairs ; 

 mesothoracic suture plainly visible; posterior angles with a long 

 hair and a spine ; a pale, lateral, marginal band, interrupted at 

 the mesothoracic suture. Legs long and stout, with swollen 

 femora and tibiae, but short tarsi ; a few short hairs on margin. 



Abdomen subclavate, with lateral margins of segments con- 

 vex, and posterior angles projecting, with one long hair and 

 several stout bristles in segments one to seven ; eighth with two 

 long hairs and two bristles, and two long hairs on posterior 

 margin ; ninth evenly rounded at tip, with two long hairs on 

 each side and a few short bristles ; posterior margins of seg- 

 ments with a series of fine short hairs ; two other transverse 

 rows of very fine short hairs across segments three to seven and 

 a single row across two and eight ; whole abdomen a uniform, 

 translucent golden, with a slight tawny tinge. 



The male is slightly smaller, with abdomen somewhat con- 

 stricted posteriorly. 



A single male and female collected on Stclgidopteryx rnftcollis 

 uropygialis, at Juan Vinas, Costa Rica, March, 1902. Of the 

 type of AI. riisticinn Piag. and dissimile KelL. but differs in the 

 shape of the head, and the markings of thorax and abdomen. 



Menopon laticorpus sp. nov., pi. VII, fig. 5 



Female. — Body, length 1.40 mm., width .70 mm. ; clear brown, 

 with numerous markings and bands of deep smoky brown ; abdo- 

 men very large and broad, oval ; head broad and very short. 



Head, length .27 mm., width .58 mm. ; front flatly rounded, 

 with rather prominent, though not deep, ocular emarginations ; 

 two rather long hairs in front ; labial palpi very long and stout, 

 projecting by fourth and part of third segments; two short hairs 

 and one long one just back of the palpi; two short hairs point- 

 ing backward from front of ocular emargination ; ocular fringe 

 very sparse ; temples short, produced laterally, and evenly 

 rounded with two long pustulated hairs and several shorter ones, 



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 190 



