THE DECTICIN.E OF NORTH AMERICA— CAUDELL. 353 



itor were considered as were also size and habitat, but none proved 

 serviceable for the separation of the specimens l)efore me into species. 



That Anabrus coloradus is but a form of ^1. .simplex is strongl}' indi- 

 cated bj'^ the fact that the author himself probably failed to properly 

 difi'erentiate his own species since he mentions specimens occurrino- in 

 high altitudes in Colorado n^^ jri/rpurascens, while eoJoradas is certainly 

 the typically alpine form, and Scudder has pointed out that the high 

 altitude speci(\s mentioned ))y Thomas was not ■purpurascens^ but 

 colorada.s. Again, specimens which are very probably coloradus^ from 

 Middle Park, Colorado, were treated of by Putnam and Thomas as ^L 

 simplex. This all goes to show that the separation of these species 

 was not satisfactory, and my reduction of them to varieties of one 

 species seems to me amply justified. 



My studies hav^e been confined almost entirely to cabinet specimens, 

 and future examination of living or fresh material may justify the 

 restoration of the varietal names here employed to specific rank and 

 the recognition of additional species. But for the present I am unable 

 to consider our descri))ed forms as representing more than one species, 

 recognizing, however, a number of named varieties. The habits of 

 all being essentially the same I consider indicative of their being con- 

 specific. This complex species and two new ones herein character- 

 ized may be separated by the following table: 



KEY TO THE SPECIES OP ANABRUS. 



A. Posterior femora less than two times as long as the pronotum. 

 B. Cerci of the male with the apical branches not widely divergent (fig. 47). 



Smaller, pronotum of both sexes under 15 mm. in length simplex, p. 353 



W. Cerci of the male with the apical branches widely divergent (fig. 48). Larger, 



pronotum of both sexes more than 15 mm. in length cerci<d(i, p. 361 



Al^. Posterior femora more than two times as long as the \^Yonoi\\n'\ . . Jongipes, p. 361 



ANABRUS SIMPLEX Haldeman. 



Anahrus simplex Haldeman, Stansb. Expl. Utah, 1852, ]i. 372, pi. x, fig. 4. — 



Aldrich, Bull. no. 41, Exp. Stat., Idaho, 1904, p. 302, fig.— Doten, Bull. 



no. 56, Exp. Stat., Nevada, 1904, j). 10. pi.— Gillette, Ent. News, XV, 1904, 



p. 321, pi. XIX. — Gillette and Johnson, Bull. no. 101, Exp. Stat., Colorado, 



1905, pp. 1-16, pi. I.— Reiin, Ent. News, XVII, 1906, p. 288.— Kirby, Syn. 



Cat. Orth., II, 1906, p. 191. [Additional references in Scudder's Index of 



Orthoptera (1901).] 

 Anabrus purpurascens Uhler, Proc. Ent. Soc. Philad., II, 1864, p. 550. — Hollis, 



Bull. no. 38, U. S. Dept. Agric., Bur. Ent., 1904, p. 107.— Kirby, Syn. 



Cat. Orth., II, 1906, p. 191. [Additional references in Scudder's Index of 



Orthoptera (1901).] 

 Acheta nigra Lord, Nat. in Vane, I, 1866, pp. 264-6. 

 Thamyiotrizon purpurascens Thomas, Proc. Acad. Nat. Sci. Philad., 1870, p. 76; 



Ann. Kept. U. S. Geol. Surv. Terr., II, 1871, pp. 265, 268. 

 ^ncrfents .sim/7/,s Scudder, Kept. IT. S. Geol. Surv. Nebr., 1872, j). 249; Can. Ent. 



XXVI, 1894, pp. 181, 183.— Kirby, Syn. Cat. Orth., II, 1906, p. 191. 

 Proc. N. M. vol. xxxii— 07 23 



