442 GEOLOGICAL SURVEY OF THE TERRITORIES. 



removed from Ancibrus^ and I place them in tliis genus with some hesi- 

 tanc3\ ISTor can I decide the point satisfactorily without a better knowl- 

 edge of these genera. I have not met with either of these species on 

 the western slope. 



Decticus paUidi])al2)U8, no v. sp. 



Female. — Face round, smooth 5 occiput convex, smooth, terminating 

 at the vertex in an oblique cone, separated from the foce by a cross 

 impression between the antennce. Antennae longer than the body; first 

 joint broad and flat, not reaching the top of the vertex; third joint 

 cylindrical, about twice as long as the second ; rest of the joints have 

 on them a few scattering hairs. Maxillary i^alpi less than twice as long 

 as the labial ; fifth joint longest, sub-clavate, with rounded apex, straight ; 

 third joint a little longer than the fourth, which is slightly curved. 

 La*brum obovate, wide as the clypeus ; the latter subtriangular, not 

 separated from the face. Pronotum short, but not transverse, having 

 three distinct and equal carime, the lateral slightly converging a little 

 in front of the middle ; front margin truncate, slightly waving ; poste- 

 rior margin obtuselj^ rounded ; lateral margin extends below the lower 

 border of the eyes, the lowest part a little behind the anterior angle, 

 the angles rounded; the posterior, oblique lateral margin slightly curved 

 inward; no cross incisions, the carinre being continuous. Elytra and 

 wings hid by the pronotum. Abdomen convex above, about twice the 

 length of the thorax; ovipositor about as long as the abdomen, straight, 

 pointed at the apex; the last ventral segment triangular, deeply notched 

 at the apex, notch square; sui^eranal i^late triangular, entire ; cerci 

 minute. Prosternum not spined or tuberculate, transverse; meso- 

 and meta-sternal angles elevated into triangular i)lates, but not spined. 

 Posterior femora very slightlj^ spined beneath ; other femora unarmed. 

 Anterior tibiae with one row of three spines in front, on the external 

 margin ; middle tibiae with two rows above, four on the outer and two 

 on the inner margin; posterior tibiic with two rows of fine spines below ; 

 the appendages to the base of the first joint of the tarsi oblong. 



ColoVj (after immersion in alcohol.) — Pale, dull yellow, somewbat 

 uniform, the dorsal portions generally a little the darkest and some- 

 times with a reddish-brown tinge. Legs tinged with dull purple, or 

 testaceous. Antenna3 pale at base, rest faseous; eyes brown, with san- 

 guineus spots on the inner side, one or two of a similar character at the 

 front of the base of the antenna}. 



Male. — Elytra project from beneath the pronotum in the form of 

 scales, crossing one or two segments; disk brown, margins yellow. 

 Apex of the last abdominal segment notched ; cerci robust, curved 

 inward, a strong bent tooth on the inside about the middle ; tip of the 

 last ventral segment notched, api:>endages blunt. Dorsal i)ortions and 

 legs pale purplish. 



Dimensions. — 9, length, 1 inch; ovipositor, .74 inch; posterior 

 femora, .81 inch ; posterior tibiic, .73 inch. ^ , length, .87 inch ; pos- 

 terior femora, .73 inch; i^osterior tibiae, .G9 inch. 



Found at Copenhagen, Utah; mouth of Port l^euf Eiver; and on 

 Snake Eiver, Southern Idaho. June 15-25. 



I think that when living the general color is a pale pea-green. 



This species is closely allied to the section established by Walker, 1 

 (Cat. Dermap. Salt., pt. II, 259,) the following slight variations being 

 noticed : the difference in the number of tibial spines ; no longitudinal 

 furrow between the eyes, except in dried specimens ; the two oblique 



