GEOLOGICAL SURVEY OF THE TEERITORIES. . 455 



of it ; the transverse, impressed lines indistinct, the tiiird only crossing 

 tbe median carina. The meso-thorax and meta-thorax appear on the 

 dorsum as abdominal segments. Genital organs not prominent -, in the 

 female the upper valves of the ovipositor protrude but slightly beyond 

 the last segment, the lower valves somewhat elongate ; cerci broad at 

 base and short, the tip of the last ventral segment (or subanal plate) 

 somewhat three-pointed. The male abdominal ai^pendages of the usual 

 form. Posterior femora in the female considerably shorter than the 

 abdomen — about equal to it in the male. Prosternal spine almost oblit- 

 erated, being shortened to a simple tubercle. Antenuee short, sub-mo- 

 niliform ; joints very short. It is entirely apterous, v>'ithout sign of 

 elytra or wings. 



Color, (of the living insect.) — General color dull olive-brown ; disk 

 and sides of the pronotum and abdomen olive. There is a black line on 

 the occiput; lateral carinse of the face and margins of the frontal costa 

 black. Female appendages tipped with red. Posterior legs are colored 

 as follows : femora dark olive-green or black ; a pale yellowish stripe 

 along the lower exterior margin, the lower outer carina olive-red, chan- 

 nel black, inner portion yellow with two oblique, black bands; tibise 

 black at the base; patella red, npper part of the exterior dark blue, 

 changing downward to purplish, vermilion at the apex, inside yellow; 

 spines yellowish at base, tipj^ed with black ; tarsi red above, whitish 

 beneath. The other tibice are colored as the posterior. Dried speci- 

 mens, after immersion in alcohol, are colored as follows : dorsum dark 

 reddish-brown ; head and face paler, the black markings of the carinjB 

 remaining. Lower portions of the sides of the pronotum. a shining yel- 

 low color. A pale line along the median carina of the abdomen. Disk 

 of the posterior femora dark brown ; upper and lower exterior margins 

 yellow; channel beneath black; upper carina black; two bands and a 

 spot at the base, and another at the ai^ex, black. Patella (or tubercle 

 at the base of the tibise) yellow ; and a narrow black band just below 

 this ; remainder of the tibisB brownish-purple. Yenter and j)ectus dull 

 yellow. 



Dimensions, — 9, length, 1.05 to 1.12 inches; posterior femora, .5 

 inch; posterior tibia), .43 inch. $ , leugth, .76 inch. 



Pound on the dividing range of the Rocky Mountaius between Idaho 

 and Southern Montana; and on a ridge about 8,000 feet above the level 

 of the sea, some forty miles southwest of Virginia City, Montana. 



This species will probably have to be placed in some other genus. It 

 appears to be closely allied to Dactylotum, Oharp. ; but that author has 

 not given the generic characters with sufficient accuracy for me to decide 

 the point. I have given the characters somewhat particularly to enable 

 those who may not have specimens to judge as to its generic i)osition. 



P. Nebrascencis, nov. sp. 



Female. — Occiimt and head behind the eyes nnsually long; upper 

 convex portion of the frontal costa very prominent, extending in front 

 of the eyes equal to their width; the frontal costa suddenly exi)ands in 

 width immediately above the ocellus, and is slightly sulcate from this 

 point to the lower extremity near the clypeus ; face somewhat oblique 

 or curved inward toward the breast; eyes slightly elongate, oblique, 

 nearly straight in front. Pronotum sub-tricarinatc; median carina dis- 

 tinct ; lateral carina obtusely rounded and nearly obliterated; sides par- 

 allel, narrower than the head, rounded at the apex ; posterior lateral 

 margin without any notch or inward curve at the humerus. Elytra 



