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FAMIDY V.—TRYXALINiE.

interested should consult his “Revision of the Tryxalinae ofNorth America .” It is fully illustrated.

This sub-family is easily separated from all others withthe exception of the CEdipodinae, in which exist genera thatform a perfect connecting link.

The Tryxalinae differ from the other members of the Acri-didae by possessing a conical and elongated vertex, the frontstrongly receding, flattened antennas, which are inserted be-tween -the middle of the eyes, or farther from the mouththan their middle. The eyes are usually longer than thatpart of the genas below them; the posterior lobe of the pro-notum is usually shorter than the anterior part; the mediancarinaisnot atall crested, and thelastspine of the outer rowof the posterior tibiae is wanting. The difference betweenthis family and the CEdipodinae is in the joining of the ver-tex and front, as indicated in the table of sub-families givenbefore.

Most members of this sub-family of orthoptera aregrass-loving insects, which delight to rest upon sandy spotssurrounded by these plants. They strongly contrast in thisrespect with the CEdipodinae, which generally prefer barrenhillsides, dusty roads and other localities characterized byscanty vegetation. The short wings of the former are neverbrilliantly colored, nor are their tegmina large and showy,as this would not blend well with their surroundings. Yetthe colors, even in the same species, are quite variable,brown or green tints predominating.

GENERA OF TRYXALINAE FOUND IN MINNESOTA .

A. Head equaling, never exceeding, the pronotum in length.Antennae triquetrous or strongly depressed at base;pronotum with the lateral lobes vertical and straightand the lateral carina not at all sinuate; mediancarina of the pronotum generally cut much behind themiddle; the disk plain and unstriped.