DE. THOMAS ON ACRIDID.E. 125 



Pronotum sub-cylindrical, without any distinguishable carinse ; posterior 

 sulcus behind the middle. Elytra and winsjs passing the abdomen 

 slightly. Posterior femora not so robust as usual in (Jaloptenus ; about 

 as long as the abdomen ; anterior and middle femora comparatively 

 slender. Antennae a little longer than the head and thorax. Prosternal 

 sharply conical, broadest lengthwise at the base ; directed obliquely back- 

 ward so as to approach the border of the mesasternum. 



Ootor (dried after long immersion in alcohol). — Ground color through- 

 out, yellow varied only in shading and by the dark brown dots men- 

 tioned, which are scattered profusely over nearly every part of the 

 external surface, except the elytra, wings and venter, being rather sparse 

 only on the sternum and posterior tibiae. On the face they are found 

 chiefly on the carinas ; on the pronotum there is usually a band of them 

 along the front and posterior margins, and a group on the middle of the 

 disk ; on the posterior femora they are chiefly placed in longitudinal rows, 

 one along the central line of the disk, and one on each carinte. The head 

 and posterior femora, and sometimes the front part of the pronotum, are 

 of a darker, somewhat orange, shade. The eyes are usually marked 

 with numerous oval yellowish spots. The antennae are banded alter- 

 nately with yellow and dark brown, very distinct and well defined, the 

 yellow being at the nodes, and the dark on the internodes ; the yellow 

 bands are alternately broad and narrow, thus making the dark bauds 

 appear in pairs. Elytra and wings immaculate ; the former a transpa- 

 rent greenish yellow, the latter slightly more pellucid ; both were proba- 

 bly pale green when living. 



Jfaie.— Differs but slightly from the female. Is much smaller ; the 

 vertex between the eyes very narrow and more distinctly grooved ; ely- 

 tra and wings longer as compared with the abdomen ; face more oblique. 

 The abdomen is scarcely or but very slightly enlarged at the tip ; the last 

 ventral segment somewhat elongated and narrowing to the tip, which is 

 strongly elevated ; cerci small, and rapidly tapering to a point ; suiier- 

 anal plate, elongate-triangular, rounded at the tip, with a distinct 

 median longitudinal groove above. 



The face of the female is nearly vertical ; that of the male somewhat 

 oblique. 



Dimensions. — $ Length to tip of abdomen, 1.00 inch to 1.05 ; length to 

 tip of elytra, I.IO in. ; elytra, .82 in. ; posterior femora, .53 in. ^ Length 

 to tip of abdomen, .62 to .75 in. ; to tip of elytra, .80 to 1.00 in. ; elytra, 

 .52 to .75 in. 



Five females and thi'ee males collected in Arizona by Lieut. Wheeler's 

 Expedition in 1874, and accidently omitted in the report made to liim by 

 me. 



This well marked and very distinct species can be easily recognized, 

 both from alcoholic or living specimens, no matter what the general 

 color of the latter may be. It evidently belongs to Scudder's new genus, 

 Hesperotettix, formed by him to receive my Ommatolampis viridis. 



