388 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxii. 



with a few minute stout black spines, usually scarcely more than acute 

 tubercles;- anterior tibii© armed above on the outer side onl}" with three 

 spines; anterior femora with two or three very small short spines 

 below on the inner margin. Eh'tra lateral and projecting- a little 

 beyond the pro.notum. Abdomen moderatel}" stout, scarcely carinate 

 dorsally; cerci about three times as long as the basal breadth, round, 

 and rapidl}^ tapering; ovipositor almost straight, just perceptible, 

 curved upward in the apical half, considerably shorter than the pos- 

 terior femora. 



Color yellowish, with the upper portions of the lateral lobes of the 

 pronotum and the abdomen, except the posterior margins of each seg- 

 ment and a pair of subdorsal stripes, fuscous. The disk of the pro- 

 notum is marked by a spear-shaped fuscous spot. 



Measurements. — Length, pronotum, 7.25 mm.; posterior femora, 

 22.5; elytra, 1.5; ovipositor, 18; width, pronotum across metazona, 

 4.5; posterior femora at narrowest point, 1.25, at widest point, 4.5; 

 ovipositor, at the middle, 1.5. 



Ti/jje.— Cat. No. 10186, U. S. National Museum. 



Specmien examined. — One female, Pocatello, Idaho. Presented by 

 Professor Bruner. 



PLAGIOSTIRA Scudder. 



Plagiostira Scudder, Ann. Rept. Chief Eng., 1876, p. 501; Can. Ent., XXA'I, 

 1894, pp. 179, 182; Guide Orth. N. Amer., 1897, p. 57.— Kirby, Syn. Cat. 

 Orth., II, 1906, p. 195. 



Destriptlon. — Head small, not prominent, ver}^ deeplv inserted into 

 the pronotum: vertex very narrow, less than one-fourth as broad as 

 the interocular space and scarcely prominent; eyes rounded, of medium 

 size and very prominent. Thorax large, posteriorly much produced; 

 lateral lobes very shallow, not sinuate posteriorly, perfectly vertical; 

 lateral carinie well developed except on the anterior fifth, where they 

 are very obscure and rounded, straight or bowed out considerabl}- in 

 the middle; median carina distinct, but dull, on the posterior border 

 only, sometimes scared}^ indicated, in some specimens anteriorly 

 replaced by- a double sulcus; disk flat, rectangular or somewhat oval 

 in form, with a broad, deep transverse sulcus occupying the middle 

 part of the posterior half; this broad depression does not, however, 

 interrupt the lateral carina; across the middle of the anterior third is 

 a narrow- but distinct and moderateh^ deep transverse furrow or sul- 

 cus, in front of which the lateral carinas are but poorly developed, the 

 sulcus passing down across the lateral lobes to near the lower margin. 

 The anterior margin of the pronotal disk is truncate, the posterior 

 margin broadly rounded. Prosternum unarmed but sometimes fur- 

 nished with a pair of verv small tubercles where spines are usually 

 situated; the mesosternal lobes are angularly developed in the sem- 



