386 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxii. 



IDIOSTATUS INERMIS Scudder. 



Cacopterh inermis Scudder, Proc. Amer. Acad. Arts Sci., XXXV, 1899, pp. 88, 

 89; Cat. Orth. U. S., 1900, p. 78.— Bakek, Invert. Pacifica, I, 1903, p. 14.— 

 KiRBY, Syn. Cat. Orth., II, 1906, p. 194. 



Cacopterls neradenm Scudder, Proc. Amer. Acad. Arts Sci., XXXY, 1899, pp. 

 91, 92, female, not male. 



Description. — Lateral lobes of the proiiotuiu well developed, almost 

 as deep as long and scarcel}" at all sinuate posteriori}. Tegmina of 

 the male unicolorous, the outer apical angles not marked by a black 

 spot, extending beyond the pronotum a distance equal to more than 

 one-half the pronotal length. Legs moderately short, the posterior 

 femora less than, or a little more than, three times as long as the pro- 

 notum; anterior tibi^ armed above on the outer side only with three 

 spines, ver}^ rarely the inner margin bears one spine. Cerci of the 

 female about four times as long as the basal width, 

 much swollen basally and tapering rapidly on the base 

 of the apical half, the terminal portion tapering grad- 

 ually to a point; in the male the cerci are very ditJer- 

 ent from those of any other known species, the base 

 being considerably compressed and the apical portion 

 Fig. 73.— IDIOSTATUS forms two sliarp depressed incurved teeth, the upper 

 lT,l!!?t '^^^^^'^ one short and the lower one twice as long, both 



OF MALE. »' 



directed at right angles or less to the main bod}- of 

 the cercus and the tips still more incurved and black, that of the 

 upper tooth merely sharp pointed, but that of the lower one very 

 slender and sharp; this longer lower tooth is more than one-half as 

 long as the main bod}^ of the cercus and the slender pointed ajDical 

 portion is half as long as the body of the tooth itself (fig. 73). Last 

 abdominal segment of the male with the apical lobes broad, short, and 

 rounded, the intervening sinus broad and arcuate. Ovipositor almost 

 as long or considerably longer than the posterior femora and straight. 



Color dark brownish, the dorsum sometimes wholly testaceous and 

 sometimes colored as the rest of the body. Pronotum with the lateral 

 lobes usualh" margined below and posteriorly with luteous. Tegmina 

 of the male fusco-testaceous, unicolorous. Legs f usco-testaceous. 



'Measurements. — Length, pronotum, male, 5-5. 75 mm., female, 5-5.5; 

 posterior femora, male, 14-17, female, 17-18.5; elytra, male, 3.5-4, 

 female, 1-1.5; ovipositor, 18-20. 



Types. — In the Scudder collection and in that of Professor Morse. 



8p)ecimens examined.- — I have examined the types from Nevada in 

 the collections of Scudder and Morse and an adult pair from Nevada 

 in the latter collection taken by Baker, and a single adult male in the 

 National Museum collection from Reno, Nevada, presented by Pro- 

 fessor Bruner, 



