354 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. XXXII. 



Anabrus coloradus Thomas, Ann. Kept. U. S. Geo!. Surv. Terr., V, 1872, p. 440. — 

 KiRBY, Syn. Cat. Orth., II, 190r,, ].. 191. [Bibliography in Scudder's Index 

 of Orthoptera (1901).] 



A7iahrus sp. Scudder, Psyche, VIII, 1897, p. 95. 



Description. — Head as described under the genus, the front moder- 

 ately full and broadl}' rounded; antennte long- and slender, the basal 

 segment broad, about one-half as large as one of the e3^es. Pronotum 

 with the lateral carin.e on the posterior portion nioderatelj" sharp and 

 distinct to very rounded and obscure, the median carina often almost 

 absent, sometimes quite distinct but alwa3^s low; sulci of the disk as 

 described under the genus, variable in distinctness; posterior margin 

 of the disk varjdng in contour, often subtruncate but sometimes quite 

 rounded. Legs short, the posterior femora never quite twice as long as 

 the pronotum; anterior tibim armed above on the outer side with from 

 three to live spines, usually four or five, and on the inner side with 

 one or two, sometimes with as man^^ as three and sometimes unarmed. 

 Cerci of tlie male as shown at tig. 47; the branches are nearly parallel. 





m:->JO^\ 



Fig. 46. — Anabhi's simi'le.x. Adult female. 



the interspace being U-shaped, both branches curved strongly inwards, 

 the lower being acute and considerably the longer, the upper some- 

 times blunt, scarcely pointed. Subgenital lobes of the female varying 

 in length, sometimes extending just to the end of the subgenital plate 

 and again reaching distinctly bej'ond it. Ovipositor varjang from 

 shorter to considerably longer than the posterior femora and in shape 

 from nearl}^ straight (iig. 46) to moderately curved upwards, usually 

 distinctly curved. 



Color varying from light yellow to shiny black, often, especially in 

 life, grass green. The body is sometimes uniform in color and some- 

 times evenly mottled or var^angly marked. 



Measurements. — Length, pronotum, male, 7-14.5 mm., female 9-15; 

 posterior femora, male, 12-23, female, 14-26; posterior tibia, male, 

 11-22, female, 13-26; intermediate tibia, male, 5-13, female, 6.5-14; 

 ovipositor, 15-28. 



Specimens examined. — Numerous specimens from almost the whole 

 of the United States west of the States bordering the Mississippi river. 



