722 GEOLOGICAL SURVEY OF THE TERRITORIES. 



along' the ni)]>eu portion of the side of the pronotum, passing over the 

 lateral cariiiie upon the disk of the posterior lobe: the lateral carinas 

 yellowish. The elytra have a pale stripe along the lower (or anterior) 

 field, near the margin ; a narrow stripe along the middle iield is marked 

 "With black or dark fuscous spots, four or five in number; the portion 

 above this and the apical third semi-transparent, distinctly tinged with 

 reddish purple. Wings transparent but tinged, especially the front and 

 apical portions, with reddish purple ; the nerves and nervules of the front 

 portion dusky. Posterior femora pale yellow; a narrow dusky stripe 

 along the upper carina (or rib) of the disk ; two pale dusky spots on the 

 inside of the upper carina. The posterior tibia has the lower two-thirds 

 of the under surface dusky, the resc pale yellow; spines white at the 

 immediate base, rest black. Antenme pale rufous. 



The pronotum expands but moderately on the posterior lobe, the 

 lateral carinte curving regularly inward, (though moderately,) the closest 

 approximation being in advance of the middle; posterior margin ob- 

 tusely rounded; no entering angle on the posterior lateral margin, 

 though it slightly (very slightly) curves inward from the humerus lo 

 the lower angle. 



The sub-anal plate of the male is slightly elongate, fleshy, entire, and 

 rounded at the tip. 



Dimensions. — 9 Length, .75 inch; elytra, .60 inch; posterior femora, .46 

 inch; posterior tibiie, .0'^ inch; pronotum, .1.3 inch. $ Length, .64 inch; 

 elytra, .52 inch; posterior femora, .40 inch; posterior tibiie, 06 inch. 



Abundant in the vicinity of Omaha, Nebraska, August 1. This inde- 

 pendent description, taken from living specimens, is given here, that it 

 may be used as a means of comparison with specimens from other locali- 

 ties, as there is so much difiiculty in distinguishing some of Mr. Scudder's 

 closely allied species, if in fact they are distinct, which is a matter of 

 some doubt. 



Cidoptenus occidenialis ? Thos. 



Jn the Minnesota portion of Red River Valley, at Glyndon, on the 

 Korthern Pacific road, and near Morris, on the Saint Paul and Pacitic 

 road, I found a small variety of this genus quite abundant, which, though 

 difiering slightly from occidentalism ai)pears to belong to that species. 



Foveola of the vertex elongate, rounded in front; frontal costa solid 

 above the ocellus and slightly sulcate below it, with a row of punctures 

 each side. Tiie pronotum has the lateral carinas tolerably well defined 

 and almost right-angled, especially in the male. Elytra and wings about 

 as long as the abdomen in the female. Posterior femora reach the tip 

 of the abdomen. Autenmie extend to the posterior extremity of the 

 pronotum. Prosternal spine broadly transverse- at the base. The cerci 

 of the male are short and tapering, turning up very slightly; the tip of 

 the sub-anal plate is entire, not notched. 



Color of tJie livinf/ insect. — The face is sometimes almost milk-white, with 

 a few luteous or purplish dots sprinkled over it ; the cheeks are pale, but 

 a black stripe, quite narrow, runs down the sulcus below the eye; the 

 usual black stripe behind the eye, extending upon the pronotum, is pres- 

 ent, but is very variable. The lateral and posterior margins of the pro- 

 notum are bordered by a broad pale, iiurplish band; a very naiTOW 

 white stripe extends down the side of the thorax from the base of the 

 elytra to the insertion of the posterior legs. The elytra are almost uni- 

 form in color; sometimes a few diui dots can be seen along the middle 

 field, yet many specimens api>ear to have them unspotted; the general 

 color is a dark ashy brown, wings transparent, tinged with blue; this 



