GEOLOGICAL SUEVEY OF THE TEEKITOEIES. 465 



Stenobothrus, Fisch. 



I have as yet observed but one new species of this genus among my 

 collections, yet there may be more, as I have not yet examined them 

 fully 



S. hicolor, nov. sp. 



Lateral foveolse wanting. Face oblique. Three yellow and two 

 brown stripes, reaching from the vertex to the apex of the elytra. 



Vertex scarcely expanding in front of the eyes ; margins elevated, ob- 

 tuse; median line or carina distinct ; the tip obtusely rounded. Frontal 

 costa broad, expanding below, not suicate, but slightly depressed at the 

 ocellus. Lateral carinse prominent and diverging rapidl}^ Each side 

 of the face, between the middle and lateral carina, has an irregular 

 curved impression. Eyes ovate, placed well forward. The head seen 

 from above is slightly broader than the thorax, and tapers to the vertex. 

 The pronotum is the same length as the head ; truncate in front, obtusely 

 rounded behind; sub-cylindrical, faintly tricarinate, the three carinse 

 being close together, parallel (though in some specimens the lateral 

 carinas are slightly bent inward near the middle;) the posterior trans- 

 verse incision only cuts the carinse, and is situated behind the middle. 

 The antennee somewhat flattened, not longer than the head and thorax, 

 about twenty joints. Elytra narrow, as long as the abdomen ; wings 

 nearly same length. Abdominal appendages very short, the uj^per 

 valves of the ovipositor not passing beyond the last segment. The pos- 

 terior femora reach the tip of the abdomen. 



Color, (dried after long immersion in alcohol.) — Parts of the mouth, 

 venter, and sternum pale yellow. Face dull yellow. Eyes ash-brown. 

 Two very regular brown stripes starting from the vertex, (one from each 

 side near the upper angle of the eye,) gradually enlarging, run along 

 the sides of the head and pronotum, continuing along the angle of 

 the elytra their entire length ; between them extending along the 

 middle of the head, pronotum, and suture of the elytra is a yellow 

 stripe about the same width as the brown ones are ; below each brown 

 stripe, on the side, is another broad yellow stripe, which is narrowed 

 uear the extremity of the abdomen. In other words, the color is 

 yellow, with two broad brown stripes extending along the upper part of 

 the sides. An obscure brownish band extends obliquely back behind 

 each eye to the pronotum ; and a more distinct stripe of the same color 

 marks the lower part of the sides of the pronotum, generally bordered by 

 narrow but distinct yellow lines. Wings pellucid, the nervulesnear the 

 apex dusky, the rest ocherous. Posterior femora crossed inside by three 

 dark brown or black bands ; externally, there are three broAvn spots on 

 the upper part of the disk. When living the j)osterior tibiae are blue, 

 but after long immersion in alcohol they are dull yellow ; spines black 

 at the tip. Anterior legs pale brown. The brown markings of this 

 species are often tinged with a lilac shade. 



Dimensions. — $ , length, .81 inch. ; elytra, .64 inch. ; posterior femora, 

 .51 inch. 



Found in Colorado and Wyoming, east of the mountains, where it is 

 quite common. The colors after immersion in alcohol differ very little 

 from what they are when living, except the blue of the tibiae. This 

 species apx)roaches very near to Uimcromia, and is closely allied to S. 

 epacromoides. Walk. 



Var. a. — The median or dorsal stripe brownish, which, uniting with 

 the lateral stripes, gives the entire back a brownish color; tbe posterior 

 30 GS 



