206 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 
have bred many specimens, coming forth in twelve or fourteen clays." 
i Norton.) 
J.arvn. — They are naked, slimy slugs, like those of S. eerasi, 22-footed ; color palo 
greeil, at timet almost white, enlarged near head. Head white, the six anterior legs. 
amethystine brown, tail segment constricted, rather sharp. (Norton.) 
Sun- Hi/. — Male and female: Shining black, short and compressed ; antenna' slightly 
enlarged in middle, third joint nearly as long as fourth and fifth ; head polished ; 
lower ocellus in an oval basin, with three pits beneath; body wholly black; legs 
black, the two anterior pairs clear white below the middle of femora ; tips of their 
tibia- waxen : the basal two-thirds of posterior tibia- and of first tarsal joint white; 
tarsi fuscous, apical joint of all the tarsi waxen-white; inner tooth of cl^ws minute, 
beneath the middle. Wings hyaline, iridescent, nervures blackish, first submarginal 
cell rounded at base. (Norton.) 
287. Selaiidria diluta Cress. 
Order Hymenoptera ; family Texthredixidje. 
The following account of this saw-fly has been furnished by Prof. 
Riley : 
Spring larva 1 feeding on the under side of the leaves of the post-oak, often several 
together during the latter part of May. Just previous to entering the ground the 
larva sheds its spring skin; enters ground the last of May or early in June. Flies 
emerge about the first of May following. (Unpublished notes.) 
Larva. — Length of full-grown larva, f inch. Color, pale translucent green, pur- 
plish on dorsum ; head, green, with two large black spots near the top, and four mi- 
nute black dots below them, just above the jaws. Dorsum and sides quite thickly 
covered with spiny tubercles, those on dorsum bifid, while the lateral ones are single. 
Thoracic legs yellowish, prolegs of the same color as the general surface. (Riley.) 
288. Cecidomyia q.-pUula Walsh. 
Order Diptera ; family Cecidomyiid.e. 
.i q.pilukr. After Riley 
The following notes on this Dipterous gall-fly have been copied from 
Professor Riley's notes. I have found it common on the oak in Octo- 
ber, at Providence: 
Found in abundance on the laurel-leaved oak, the gall always on the upper surface 
with the nipple on the under surface of the leaf (October 25, L869). I find in every 
