46 NEOTROPICAL PSELAPHIDAE 



32 facets (since my specimens are females, this eye size is unusual for the tribe, 

 Raffray (1908) having pointed out that the female jubine tends to have 

 smaller eyes than the males sex in the tribe, in the same species; since Sharp 

 had only a female type, no sexual comparison was possible for him in this 

 regard, and the male scydmaenilla may have eyes as large or larger than in 

 raffrayi; certainly my female scydmaenilla have fewer facets than the male 

 rafjrayi but more facets than the male notonoda). Antennae quite different 

 from raffrayi or notonoda, segments I and II equal in length and width; I 

 ovate; II truncate apically; III, IV and VI of about same width; V slightly 

 wider than IV or VI; IV, V and VI moniliform, V longer than IV or VI; 

 VII longer and wider than VI, irregularly subquadrate, slightly produced on 

 the anterior face; VIII, IX, X and XI forming a less distinct club than in 

 raffrayi or notonoda; IX and X of about same width ; XI nearly twice as long 

 as X. Ventral surface of the head with the typical V-shaped pattern formed 

 by oblique, converging carinae but with these converging carinae having their 

 origin more medianly than in raffrayi or notonoda, and fusing at a point op- 

 posite the anterior third of the eyes ; enclosed surface of the V evenly concave, 

 but then deepening centrally to form a clearly-defined, perfectly circular, 

 shallow and flat-bottomed fovea. Head otherwise as in raffrayi. 



Pronotum with the transverse median sulcus well-defined and perfectly 

 straight for the median four-sixths of its width. Disc of pronotum with no 

 antebasal platform, which instantaneously separates the males of centralis, 

 notonoda, and raffrayi (females unknown) from the females of scydmaenilla 

 (males unknown). Pronotum otherwise as in raffrayi. 



Elytra with the transverse basal carina paralleling the basal elytral mar- 

 gin, and the sutural fovea recessed less deeply than in raffrayi. In these re- 

 spects notonoda is similar to scydmaenilla. Elytra otherwise as in raffrayi. 



Abdomen proportionately broader than in raffrayi and notonoda, which 

 may well be a secondary sexual, rather than a species character. First tergite a 

 little more than twice as long as second; fifth tergite small, one-half as long 

 as fourth. Third sternite slightly longer than fourth; fourth and fifth stemites 

 of equal length; no median tubercle on fifth sternite, and with its posterior 

 margin not deeply incised (this latter being typical for females in general) ; 

 sixth sternite one-fifth longer than the fifth, evenly convex, lacking a median 

 flattened area or a median concavity, and with the posterior margin slightly 

 produced medianly. Abdomen otherwise as in raffrayi. 



Prostemum as in raffrayi. Metasternum much shorter than in raffrayi or 

 notonoda, evenly convex, rather granular near posterior coxal articulation 

 and also medianly in a longitudinal line, the effect being that of a subcarinate 

 condition. Posterior coxae short, but longer than in raffrayi or notonoda. Tibiae 

 less arcuate than in these two latter species, but slightly inflated ; tarsal claws 

 more unequal than in the two species named above. Ventral surface and legs 

 otherwise as in raffrayi, save that the mesosternum could not be examined. 



Redescribed on two females, both taken on Barro Colorado Island, Gatun 

 Lake, Panama Canal Zone. One specimen was collected by the author from 



