GEOLOGICAL SURVEY OF THE TERRITORIES. lid 



the abdomen, lanceolate ; the two longitudinal veins strong, approaching 

 each, other at the apex along the external margin; the reticulate veins 

 coarse. Wings shorter than the elytra. 



Color (siccus): Dark ferruginous; lower angles of the face and side of 

 the labrum black; tips of the elytra black; apex of the wings dusky, 

 rest transparent ; two reddish spots inside the posterior femora ; tibia 

 transparent red. 



Male : Similar in coloring, only darker. Elytra black, somewhat paler 

 at the base ; wings transparent, cloudy at the apex. 



Dimensions: Female — length, 1.5 inch ; pronotum .35 inch ; elytra, .55 

 inch ; femora, .95 inch ; tibia, .80 inch. Male — length, .87 inch ; prono- 

 tum, .25 inch ; elytra, .55 inch ; femora, .62 inch; tibia, .56 inch. 



Habitat : Southern Colorado and northern New Mexico ; mostly in the 

 valleys near the mountains. 



[Note. — I regret very much two mistakes that occur in my paper pub- 

 lished in the Proceedings of the Acad. Nat. Sci., Phila., 1870, July. One 

 occurs on page 80, where I have described as a new species, under the 

 name Oe.pruiripsa, Say's Gryllus trifasciatus, which isnotonly sufficiently 

 described for identification, but is also figured. The other mistake is on 

 page 83, where I have described Gryllus nubilus of Say as a new species, 

 under the name of B. nigrum. I had examined them and determined 

 them, and laid them aside for the purpose of referring them to their 

 proper genera and had marked the place in Say's Ent. where they are 

 described. Having to close up my article rapidly, preparatory to my 

 departure west, forgetting these facts, and finding them among those 

 examined and to be described, I proceeded to describe them without fur- 

 ther examination. A few days after I became aware of the mistake and 

 immediately wrote a letter to Dr. Hayden, making the correction, and 

 forwarded it to him at Washington, as 1 had forwarded the original man- 

 uscript through him, but it did not reach him in time. The synonyms 

 will now have to stand, and I sincerely trust they may be the only ones 

 in that paper.] 



B. flavo-fasciatum, Thos. Syn., B. flavo-fasciatum, Thos. (Proc. Acad. 

 Nat. Sci., Phila., 1870, p. 84.) — Female: Carving and figure much the 

 same as the female of B. nubilum, differing only in this, that the anterior 

 transverse incision (1) being more indistinct, and the incision on the side 

 of the pronotum near the front more distinct. Central foveola of vertex 

 very shallow, divided into two parts by a slight median carina ; frontal 

 ridge convex, sparsely punctured. 



Color (siccus:) Yellow, varied with brown. Head, yellow; lower 

 angles of the face black; a very distinct yellow line, starting from the 

 upper corner of each eye, reaches the posterior margin of the prono- 

 tum, bowing inward near the middle, bordered on each side by an irreg- 

 ular, dark-brown line ; a dark line borders each eye posteriorly. Median 

 carina of the pronotum dark brown or piceous black; the transverse 

 incision black; rest of the pronotum brownish, palest on the sides. 

 Elytra formed as in B. nubilum, brown, a pale-yellow stripe near the upper 

 and lower margins of each, the upper having a notch on its lower side ; 

 three oblong yellow spots in a line or row along the middle, and a few 

 smaller spots of the same color near the apex ; they reach the third ab- 

 dominal segment. Wings transparent, dusky at the tips. A brown 

 stripe along each side of the abdomen, near the dorsum; a yellow spot 

 in it on each segment near the upper border. Venter, yellow. 



Male: Unknown. 



Dimensions: Length, 1.5 inch; pronotum, 38 inch; elytra, .50 inch; 

 femora, .85 inch; tibia, .70 inch. 

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