908 CHARLES PauL ALEXANDER 
Tribe Eriopterini 
The tribe Eriopterini comprises a vast assemblage of usually smali crane- 
flies whose geographical range is coextensive with that of the family. 
The larvae, so far as known, are herbivorous. They show a remarkabie 
uniformity in the structure of the head capsule. In the generalized 
members such as Molophilus and some Erioptera, the ventral bars of th 
head capsule are toothed at their anterior ends and form mental plate 
which are apparently homologous with those of the Pediciini. In Chione 
an apparently similar condition exists, to judge from Brauer’s figures 
In the majority of species, however, the ventral bars of the capsule ar 
not enlarged nor toothed anteriorly and do not function as the menta 
plates. The hypopharynx is preserved as a hemispherical cushion whic 
is densely provided with setae. The mandibles are smail and are blun 
at their tips; the teeth of the cutting edge are usually three in numbe 
and blunt, but in some species (Ormosia, Gonomyia) they are longe 
and more prominent. A distinct prosthecal lobe or hook is usuall 
developed, and near the base of the mandibie is a slitlike opening bearin 
a fringe of long, yellow setae. The maxillae are rather large, hairy lobe 
The labrum and epipharynx is long and narrow, and densely hairy. Th 
antennae are remarkably uniform thruout the group, consisting of a stou 
cylindrical basal segment with a slightly smaller apical papilla of a 
elongate-oval shape. In the Elephantomyaria the condition is somewh 
similar, the mandibles being very small, and the esophageal region bein 
conspicuously grooved with parallel lines and ridges. The spiracul 
disk is obliquely truncated and indistinctly lobed in Chionea and Teuch 
labis; surrounded by four lobes in Elephantomyia; squarely truncate 
and surrounded by four (in Rhabdomastix) or usually five lobes. I 
the undetermined Eriopterine No. 1, the five lobes are spatulate flattene 
blades with the margins hooked. Anal gills are usually present a 
variously developed in the different genera. The pupa is rather slende 
in the Elephantomyaria with the rostral sheath very long and the pal 
strongly recurved. The head usually bears a small setiferous crest whi 
is rarely lacking. The pronotal breathing horns vary considerably 
form and relative size, being flattened into fans in some Gonomyia, sm 
and trumpet-shaped in other Gonomyia and in Gnophomyia, elonga 
in most species. ‘The mesonotum is usually armed at the crest with spin 
hooks, or setiferous tubercles. The leg sheaths are very short in Gn 
