- 14 - 
have been spread in this manner, they usually jump and then fly 
for a short distance. 
Limothripsltritici Fitch, has long been known as an onion pest 
in the Eastern States, producing what is known as “ white blight ” 
of the onion tops. In the 16th Report of the State Entomologist 
of Illinois, p. 9, Dr. Forbes speaks of this insect as doing injury to 
strawberries in that State. 
Fig. 11 is a representation of this insect, much enlarged, from a 
drawing made by Mr. C. F. Baker, and first published in the Amer¬ 
ican Florist, Vol. VII, p. 168. It serves well to illustrate the female 
of our supposed Thrips striatus, except in the arrangement of the 
cilia of the wings. Fig. 12 h represents the arrangement of the 
cilia and spines upon the fore wing of the species that has been do¬ 
ing so much injury to onions in this State. 
Numerous specimens of this insect were sent to Prof. Osborn, 
of the Iowa Agricultural College, and to Mr. Pergande, of the De¬ 
partment of Agriculture, Washington, D. C., and were, in both cases, 
determined as probably Thrips striatus. The mature female may 
be described as follows, from a quantity of material collected here: 
Length, l-24th of an inch (1.1—1.3 mm.); color, from pale lemon 
yellow to brownish yellow, the darkest specimens apj»earing quite 
smoky. The only black parts are the compound eyes and the tips 
of the mouth parts. The antenna3 are dusky towards the tips; the 
legs are concolorous with the body ; the anterior wings are heavily 
fringed with slender, wavy hairs on the distal twoThirds of the 
posterior margin. [See Fig. 12 ^.] On the anterior margin of these 
wings there is a row of short, stout black hairs along the entire 
length, the largest one being at the extreme tip. There is also on 
