GEOLOGICAL SURVEY OF THE TEERITOEIES. 4:49 



calopteiioid in general appearance. Vertex regularly hexagonal, stand- 

 ing out in the form of a short truncated cone, the tip depressed in the 

 center 5 face slightly oblique, straight, quadricarinate 5 carinse nearly 

 parallel, middle pair approach each other immediately below the ocellus. 

 Eyes elongate, oblique, straight in front. Pronotum scarcely enlarged 

 behiud; anterior lobes reticiilately, and posterior lobe longitudinally, 

 rugulose ; median carina very distinct, but not elevated. Elytra and 

 wiogs narrow, rather shorter than the abdomen. Yalves of tlie ovix)os 

 itor prominent, the lower pair much slenderer than the upper and much 

 exserted. Male cerci slender, tapering and curved upward; subanal 

 l^late narrow, tapering, subtruncate at the apex, eotire. Prosternal spine 

 subquadrate, x)ointed, and straight. Antennge passing the pronotum. 

 slightly. Posterior femora passing the abdomen. 



Calory (dried after immersion in alcohol). — Nearly uniform greenish- 

 yellow. Pace and pronotum sprinkled vwith dusky dots. The elevated 

 lines of the pronotum pale yellow ; depressed portions in the alcoholic 

 specimens testaceous-green, but in the living iusect may be and proba- 

 bly are colored quite differently ; some specimens have the niiddle carina 

 and other portions of the pronotum tiaged with red. Posterior femora 

 pale reddish along the upper edge. Elytra a transparent green ; wings 

 pellucid. 



Dimensions. — Q , length, LOG inch.; elytra, .63 inch.: posterior femora, 

 .72 inch. ; posterior tibiie, SQ inch. <^ , length, .82 inch.; elytra, .5 inch. 



Kansas, (from 0. R. Dodge's collection.) 



There is a possibility that this is synonymous with Pezotettix speciosa, 

 Scudd., (Hay den's U. S. Geol. Surv. E'eb., 250,) vdth which it agrees 

 tolerabl^^ well except in the length of the elytra and wings ; but Mr. 

 Scudder maj have had the pupge, and he i)laces it in Fezotettix provis- 

 ionally, "as it does not strictly appertain" to that genus. It is a some- 

 what anomalous species, but I think my specimens belong to Acridium. 



A. emargi7iaUtm, Uhl., (Scudd., ISotes on Orthop., Geol. Surv. E^eb.) 



This species is closely allied to and much like A. alutaceumy Harr. It 

 is the same one which I, in my former report, referred to A. Jiavo-facia- 

 tum, DeG. It has been found in Southeastern Colorado and in Nebraska, 

 but appears to be rarely met with. 



Oaloptenus, Burm. 



The following table of the species belonging to the United States will 

 give the distinguishing characters of the new species herein described : 



A. Elytra without spots : 



a. A broad yellow stripe along each lateral angle Mvittatus. 



aa. With but one or no dorsal strix)e : 



h. General color green, a yellow dorsal stripe *viridis, 



hh. Dorsum not striped : 



c. Elytra a little longer than the abdomen; size, 



large differcnUalis. 



CG, Elytra much shorter than the abdomen; size, 



small * Bodgei. 



AA. Elytra with spots : 



a. Elytra longer than the abdomen. 



J). Elytra much longer than the abdomen ; last ventral segment 

 of the male notched at the tip s^^rctns, 



29 as 



