5 ( J2 fifth report of the entomological commission. 
-1 l.m hints salicicolu Uhler (Aphis salicti Harr.). 
Mr. ftfonell lias described ad aphid under the name of Chaitophorus 
snlicicola which Professor Thoinas (Eighth Hep. Ins. 111., p. 105) questions 
whether it may not be Lachnu* tdlioioola Uhler. We copy Harris' 
description of bis ,s<tlicti. 
Stylo nullo, corniculi* hn rihusfulvis, corpore nigra, immaculato, alarum renis pidihu»qm- 
fulvis. 
Black, immaculate : wing! hyaline, the veins, the antenna*, corniculai, and legs ful- 
vous. Body black, immaculate: first ami second joints of the antenna.' black, third 
fulvous at base, remainder fuscous; cornicuhe short, fulvous; legs fulvous, tibia at 
apex and tar>i foflOOOS. Length, about 1 line. Expanse of wings, above 4 li: 
Inhabits the willow, living on the under side of the extremities of the branches. 
October 1. 1-37. 
This species can not be identical with A. salicis Linu., which has the body spotted 
with white. (Harris' Corr.) 
85. Chaitophorus riminalis Thomas. 
This aphid occurs on the young twigs and leaves of Salix lucida and 
S. babylonica in Illinois. 
Apterous individuals. — Varying from pale green to light yellow, with two darker 
vitt;e on the abdomen which are often obsolete. Entire insect covered with long 
white hair. 
Winged individuals. — Head and thorax black ; abdomen black, except the margins 
and style, which are yellow. Nectaries a little longer than thick, yellowish, often 
slightly fuscous. Antenna? hairy; seventh joint filiform, almost as long as the three 
preceding taken together. Wings hyaline. Length, 1.52 mm ; to tip of wings, 2.54 mm . 
86. Chaitophorus smithia* Thomas. 
This aphid lives on the leaves of Salix alba, from May to June, at 
Peoria, 111. (Miss E. A. Smith.) 
Winged form. — General color dusky reddish. Wings hyaline; venation very vari- 
able. Nectaries two-thirds as long as the tarsi, vasiform, contracted at the base, 
expanding in the middle and again contracted at the apex ; the mouth flaring. 
Antenna? a little over half as long as the body, the third joint the longest, the 
fourth and fifth subequal, and the sixth joint two-thirds as long as the preceding. 
Seventh joint slender, very little longer than the preceding. Rostrum reaching the 
third pair of copae. Leugtb, 2.28 mm ; to tip of wings, 4.5G aim . 
87. Lachnus dentatus Le Barou. 
Dr. Le Baron describes this species in his second Report on the 
Insects of Illinois, p. 138. It occurs in great numbers in October and 
November on the under sides of the branches of the gray willow, and 
also occurs on small nursery apple trees. 
Moth. — Black; abdomen dark ash-colored, with six transverse rows of black dots. 
Antenna; filiform, as long as the head and thorax ; two basal joints, short and stout, 
the third as long as the three terminal ones united; these three equal. Proboscis 
greenish yellow at base. Forewings with the usual stout subcostal vein, aud a 
very elongate stigma; three discoidal veius (exclusive of the stigmatic vein), much 
