408 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxii. 



and sometimes much be^^ond the middle (fig. 90); in some specimens 

 the location of the cereal tooth is intermediate between the two figured. 

 There ma}^ be more than one species represented among the speci- 

 mens here referred to this species, hut if so, I am unable to satisfac- 

 torily separate them. 



STEIROXYS PALLIDIPALPUS Thomas. 



Decticus pallidipalpusT'aoMAfi, Ann. Rept. U.S. Geol. Surv. Terr., V., 1872, p. 442; 



Proc. Davenp. Acad. Nat. Sci., I, 1876, p. 262.— Scudder, Index N. A. Orth., 



1901, p. 95. 

 Steiroxys pallidipalpus ScvD-DER, Can. Ent., XXVI, 1894, pp. 182-183; Cat. Orth. 



U. S. 1900, p. 78; Index N. A. Orth., 1901, p. 300.— Rehn, Ent. News, 



XVII, 1906, p. 288.— KiRBY, Syn. Cat. Orth., II, 1906, p. 194. 



Description. — Head medium in size, inserted into the pronotum a 

 moderate depth; vertex broad, convex, much broader than the eye, 

 which is considerably smaller in the female than in the male. Pro- 

 notum moderate in size and in posterior prolongation, the lateral lobes 

 deep, almost vertical, with a slight posterior sinus; lateral carinte prom- 

 inent, sharp, persistent, in both sexes diverging ver}" 

 slightly posteriorly. Pronotal disk nearl}'' flat, 

 slightly rising from the lateral carinas to the distinct, 

 persistent, median carina; the disk is truncate behind 

 and in front, or very slightly rounded anteriorly, 

 „ „„ ^ without sulci. Wings and legs as in trilineata. the 



Fig. 92. — STEIROXYS _ . . . 



PALLIDIPALPUS. posterlor femora sometimes with a few small spines 

 cERcus OP ADULT beneath. Abdomen as in trilineata. Cerci of the 



MALE. 



female about four times as long as the basal width, of 

 the male heavy basally, tapering abruptly just beyond the inner tooth, 

 which is situated at or before the middle, the apex sharp and bent 

 inward (tig. 92). Ovipositor long, slightly curved upward and unarmed 

 apically, curving somewhat more in the basal portion than that of 

 the following species. ' 



Color yellowish or light brown, the posterior femora mottled more 

 or less with fuscous; lateral lobes of the pronotum in the male slightly 

 infuscated posteriori}^ and with a yellow margin above the sinus, in 

 the female about the same, but less distinct. Ovipositor dark reddish 

 brown. 



Measurements,- — Length, pronotum, male, 6.75 mm., female, T; 

 posterior femora, male, 18.5-24.5, female, 19-20; elytra, male, 3.5, 

 female, 1; ovipositor, 18.5-22; width, pronotum at posterior margin, 

 male, 1:.5, female, 4, 



Type.- — Apparently lost. 



Specimens examined. — ^Specimens from Nevada, Oregon, Idaho, 

 Wyoming, Washington, and California. 



The above description, except the minimum measurements, which 



