THE GROUSE-LOCUSTS. 
185 
ers, in the male, as long as the abdomen, in the female, 
covering two thirds of the abdomen ; wings rather shorter 
than the wing-covers, transparent, and faintly tinged with 
yellow; hinder knees black; spines on the hind shanks 
tipped with black. Length from u to more than inch; 
exp. from to nearly 1 inch. 
The flight of the short-winged locust is noiseless and short, 
but it leaps well. Great numbers of these insects are found 
in our low meadows, in the perfect state, from the first of 
August till the middle of October. They are easily distin¬ 
guished from other locusts by their short and narrow wings, 
by the yellow color of the body beneath, and by the yellow 
legs and black knees. 
III. Tetrix. Grouse-locust. 
The Greeks applied the name of Tetrix to some kind of 
grouse, probably the heath-cock of Europe, and Latreille 
adopted it for a genus of locusts in which, perhaps, he fan¬ 
cied some resemblance to the bird in question. Linnseus 
placed these locusts in a division of his genus Gryllus, which 
he called Bulla., a name that ought to have been retained for 
them. The principal distinguishing characters of the genus 
have already been given, and I will only add that the body is 
broadest between the middle legs, naiTows gi'adually to a 
point behind, and veiy abmptly to the head, wliich is much 
smaller than in the other locusts. The wings are large, 
forming nearly the quadrant of a circle, thin and delicate, 
and scalloped on the edge; when not in use they are folded 
beneath the projecting thorax. The four boring appendages 
of the females are notched on their edges with fine teeth, like 
a saw. Latreille and Serville have stated that the antennae 
consist of only thirteen or fourteen joints; but some of our 
native species have twenty-two joints in the antennae. Upon 
this variation I would arrange those now to be described in 
two groups. 
24 
