A NEW GENUS AND NEW SPECIES OF 
CHRYSOPIDAE FROM THE WESTERN UNITED 
STATES, WITH REMARKS ON THE WING VENATION 
OF THE FAMILY (NEUROPTERA) 1 
By Phillip A. Adams 
Harvard University 
In some material collected by the writer in southern 
Arizona in 1949, a single female specimen of a chrysopid 
was found, representing a previously unknown genus 
and species. The venation of this genus is remarkably 
like that of the Chrysopidae described from the Miocene 
shales of Colorado. Two other recent genera, Triplochrysa 
Kimmins and Dictyochrysa Petersen, similarly retain an 
archaic type of venation. Since these latter two genera 
have not been discussed in the light of the interpretation 
of the venation given by F. M. Carpenter (1935), they 
are compared in this paper with the new genus and with 
the Miocene genera. 
Pimachrysa, new genus 
Head : vertex moderately elevated ; anterior tentorial 
pits large; labrum emarginate. Antennae slightly longer 
than fore wing, scape short, moderately swollen; flagel- 
lum filiform, the segments slightly longer than wide. 
Tarsal claws simple, without basal tooth. Fore wing : 
costal area rather narrow; subcostal cross-vein basad of 
origin of Rs; Rs arises basad of first intra-median cell. 
Intra-median cell subtriangular, with apex toward base 
of wing. Second medio-cubital cross-vein located proxi- 
mally to furcation of MP. Two graduate series; Psm 
merges with inner series, strongly zig-zagged; Psc merges 
1 Published with the aid of a grant from the Museum of Comparative 
Zoology at Harvard College. 
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