270 GEOLOGICAL SURVEY OF THE TERRITORIES. 



carinas rosaceous; on the top of the head a faint roseate stripe runs 

 from the end of the cone to the pronotum, bordered on each side by a 

 yellow stripe; from the lower part of each eye starts a bright-red stripe, 

 which, running back across the head, continues along the upper portion 

 of the side of the pronotum to its extremity and is lost on the elytra. 

 Median carina of the pronotum red, the dorsal spaces yellow ; lower 

 portion of the sides yellow. Elytra semi-transparent ; base and stripe 

 along the dorsal margin roseate. Wings transparent; veins ochreous. 

 Abdomen dull yellow, reddish on the basal segments. Legs rufous; 

 posterior femora have a pale stripe along the upper edge ; spines of the 

 posterior tibia tipped with black. 



Dimensions : Length 1.02 inch ; to tip of elytra 1.50 inch ; to ex- 

 tremity of the pronotum, .52 inch; femora, .88 inch; tibia, .80 inch. 



Habitat : Northeast New Mexico. 



I have not seen the male. This species comes near 0. mexicana, 

 (Sauss.,) but differs from it in the following respects: The antennae are 

 not rotundate, but sharply triquetrous ; the pronotum is carinate, al- 

 though the carinas are but raised lines, yet very distinct; and although 

 the posterior lobe is minutely punctured, the pronotum cannot be truly 

 called " densely punctate." It approaches closely to Truxalis. 



{Mucronati.) 



PEZOTETTIX, (BUTUI.) 



P. picta, Thos. Syn., P. picta, Thos. (Proc. Acad. Nat. Sci., Phila., 

 1870, p. 78.) — Medium size, body elongate, stout sub-cylindrical, occiput 

 convex ; vertex deflexed, flat and narrow between the eyes, suddenly 

 expanding in front, this advanced portion transverse and triangular ; 

 the frontal ridge somewhat convex, with a very slight depression at the 

 central ocellus ; eyes large, prominent, oval ; antennae filiform, nearly as 

 long as the head and thorax. Sides of the pronotum parallel in the male, 

 and very slightly divergent posteriorly in the female ; carinas obliterated 

 by the sub-cylindrical form ; posterior margins of the sides obliquely 

 sloped, but not sinuous ; posterior angle rounded ; a slight transverse 

 incision each side close to the front margin ; the three usual transverse 

 incisions distinct, crossing the dorsum in the female, the posterior one only 

 crossing in the male ; anterior margin and posterior lobe densely punc- 

 tate, remainder smoother and sparsely punctate. Elytra very small, 

 oblong-ovate, reaching the tip of the second segment; not meeting on 

 the back ; nerves reticulate, prominent, wings minute. Posterior fem- 

 ora stout, short, not reaching the extremity of the abdomen. Sub-anal 

 plate of the male recurved with a kind of tubercle or prominence on 

 the convex surface ; upper plate falcate ; cerci small. Prosternal spine 

 stout, conical. 



Color (siccus :) alternating rings of dark purple and white. The dark 

 stripes are placed as follows : down the frontal ridge ; on the occiput ; 

 down each cheek ; two interrupted broad stripes running obliquely 

 upward and backward from the anterior margin and angle of the prono- 

 tum; four spots on the base of each dorsal, and two on each ventral 

 segment of the abdomen, (sometimes running into a continuous ring ;) 

 posterior femora crossed by three broad bands. The nerves of the 

 elytra white, the spaces black. Colors of the male and female the same. 



Dimensions: Female — length, 1.30 inch; femora, .0 inch; pronotum, 

 .28 inch. Male — length, .95 to 1 inch; femora, .5 inch; pronotum, .20 

 inch. 



