374 PROCEEDINGS OF THE NATIONAL MUSEUM vol. i08 



ably closer to lomata than any other. It is, however, easily distin- 

 guished from lomata in its wing venation. Due to the rather poor 

 chances of these acrocerids crossing the high Andean range in Peru, 

 Ecuador, and Colombia, it may be that further species will be ob- 

 tained in Venezuela and Colombia, and that the extent of the pre- 

 sumably tropical genus has or had a circum-Andean distribution in 

 the north. As to the validity of the locality data for ecualorensis 

 I have no doubt, as Sefior Campos has collected for many years in 

 Ecuador. Cole's endemic Ecuadorian genus, Camposella, was named 

 for this collector. 



It should be pointed out that the wing venation as shown in figure 

 S,a is atypical in one sense — the crossvein in the first posterior cell is 

 adventitious and does not occur in the left wing of the male or in 

 either wing of the female holotype. The right wing of the male was 

 drawn only because it was in better condition for study. 



I have made the female the holotype of this species since it is as 

 surely a Pialea as lomata. It is of course possible, though not at all 

 probable, that the males described in this work represent another 

 genus. The female specimen was in better condition, the male lack- 

 ing the terminal segment of the antennae and four of the legs. Both 

 specimens were slightly oily, but not badly rubbed. The female 

 specimen lacked the left terminal antennal segment also. 



Literature cited 



Bezzi, M. 



1912. Dipteros de Brazil. Sobre tres interessantes dipteros de S. Paulo. 

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 Brunetti, E. 



1912. New oriental Diptera, I. Rec. Indian Mus., vol. 7, No. 5, pp. 472-475. 

 1920. In, The fauna of British India including Ceylon and Burma. Diptera 



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 Crampton, G. C. 



1942. The external morphology of the Diptera. In, Guide to the insects of 

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 Hunter, W. D. 



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