1951] 
Carpenter — Oliarces 
37 
In comparing the venation of these genera with that of 
Oliarces , I have found it helpful to use the interpretation of 
neuropterous venation that was originally proposed by 
Martynov and that I employed in my revision of the Nearctic 
Hemerobioidea (1940, pp. 193-194). According to this con- 
cept, the most anterior branch of the media (labeled MA) 
is anastomosed in part with the radial sector or its last 
branch. In the fore wing, the actual separation of MA from 
Text-fig. 2. Oliarces clara Banks. Fore and hind wings of allotype. 
Lettering as in text-figure 1. 
MP is not apparent, but in the hind wing the basal piece of 
MA may extend a considerable distance before coalescing 
with the radial sector. Such is the case in Ithone (text- 
figure 1), Heterithone and Varnia. In Oliarces this segment 
of MA is very short and transverse, though it retains the 
sigmoidal form present in the Australian ithonids. This 
difference should not be regarded as more than of generic 
significance, however, since the several genera of Hemero- 
biidae exhibit a comparable diversity in the length of this 
segment. The same may also be said of the density of the 
