50 
Psyche 
[June-Sept. 
to ten inclusively indistinctly separated and without sensory 
pits ; a subbasal hair on each side of each of these segments, 
and, in addition, on segment ten, a more conspicuous apical 
bristle and two subapical ones. Proboscis short, flattened 
dorso-ventrally. Mesopleura conspicuously narrowed in 
front. Legs elongate, the coxae three or four times as long 
as the trochanters. Wings slightly longer than the abdo- 
men; veins R 2+3 and R 4 longer than, cross-vein r-m almost 
as long as, the width of the discal cell ; the discal cell slender, 
veins M 4 and M 2 arising together at its apex ; the branches 
of the media, cubitus, and anal veins distinct almost to the 
posterior wing margin; cell 2nd A elongate and definitely 
narrower than 1st A. Abdomen five-segmented. General 
body form elongate, the entire body being six or seven times 
as long as wide. 
Genotype: Monacanthella gracilis , new species. 
Monacanthella gracilis, new species 
Female. Most of front, vertex, including the ocellar tri- 
angle and the ocelli, occipital orbits, and occiput above, shin- 
ing black, the occiput below the foramen becoming brownish 
yellow; occipital orbits prominent above, with somewhat of 
Fig. 1. Monacanthella gracilis, n. sp. 
Antenna. 
Fig. 2. Monacanthella gracilis, n. sp. 
Wing. 
a bluish sheen, narrower behind the eyes; the front just 
above the base of the antennae, face, and proboscis yellow ; 
antennae yellow, darkening apically. Thorax yellow, with 
mere vestiges of three black stripes anteriorly; minutely 
