536 
ANNUAL REPORT OF NEW-YORK 
thickened towards their tips, the hind pair being very long, and the legs are pale 
yellowish, with the thighs and the thickened ends of the shanks black. The abdo¬ 
men is elliptic. The antennae in the males are thread-like and nearly as long as 
the body, composed of fourteen joints, which are very distinct, equal, oval, a third 
longer than broad, the apical one being a little longer and egg-shaped, and the ba¬ 
sal one club-shaped and thrice ns long but scarcely thicker than the following ones. 
In the female they are shorter and composed of twelve joints which arc compacted 
together, the three last enlarged and forming a kind of knob or club, the last joint 
nearly as long as the two which precede it, its end bluntly rounded. 
Upon the heads and stalks in June and July, exhausting the juices of the 
kernels and rendering them dwarfish and shrivelled; exceedingly minute, 
active, long and narrow, six-legged insects, of a bright yellow or of a shin¬ 
ing black color. 
The Wheat Thiups, Thrips Tritici, new species. 
The Thkee-banded Thrips, Coleothrips trifasciata, new species. 
My attention has been called to these insects by a letter from 
David Williams, dated Geneva, Wisconsin, July 9th, 1855, which 
says : “ Enclosed I send you specimens of a minute little insect 
that is causing some alarm in this vicinity. They are found in 
all blossoms in great numbers. They first made their appear¬ 
ance about the middle of June, or at least they were then first 
noticed, so far as I have heard. For about two weeks they were 
found in the blossoms of wheat and of clover, causing numbers 
of the blossoms to wither, and in some cases the kernel was also 
attacked. About a fortnight ago we had a very heavy fall of 
rain, which appeared to destroy them; but within a few days I 
have noticed their reappearance in countless numbers. They 
are very nimble, requiring good eyes and ready fingers to secure 
them, and I was obliged mainly to my wife for the capture of 
those which I send you.” 
The insects alluded to in the above extract are so minute, that 
had only two or three specimens been sent me, I should have 
been unable to give any definite account of their species. An 
acknowledgment is due Mrs. Williams for the number of these 
insects which she enclosed in the quill—a task which the bung¬ 
ling fingers of a man could scarcely have accomplished. Among 
them I find specimens in all the stages of their growth, and am 
hence able to present a tolerably complete history and description 
pf the species; although it is only from living specimens that such 
