DESCRIPTION. 
thrips. The habits of the larva are also quite characteristic of this 
genus, for the habits of the larva? of the greenhouse thrips {Helio- 
thrips hcemorrhoidalls Bouche) and of Heliothrips rubrocinctus 
Giard are almost identical with those of the present species. 
THE ADULT FEMALE. 
The adult female (fig. 2) is about one-twenty-fourth of an inch 
in length (0.9815 mm. to 1.1174 mm.; average, 1.0405 mm.) and 
about one-fourth as wide as long (0.2265 mm. to 0.2869 mm.; average 
Fit;. 2. — The bean thrips (Heliothrips fasciatus) : a, Adult female; b, ventral side of 
abdominal segment of same; c, antenna of same, a, Greatly enlarged; &, c, more 
enlarged. (Original.) 
width, 0.2529 mm.) and is fusiform in shape. The head and body 
are black and, under the microscope, are seen to be covered with 
distinct reticulations and short white hairs. The antenna? are 8- 
segmented and two and one-half times as long as the head, and are 
held out in front of the body. They are black, more or less banded 
with white, and bear white hairs. The wings are held folded to- 
gether down the middle of the dorsum; they are black, crossed by 
a white band at the base and a white band at three-fourths the dis- 
tance from the base. The wings are fringed with long white hairs. 
The legs are black, banded with white. 1 
1 For a detailed description of the genus and the species for use of systeniatists, see 
Hinds's "Monograph of the Thysanoptera " (Proc. U. S. Nat. Mus., vol. 26, 1902), pp. 
174-175. 
51097°— Bull. 118—12 2 
