MORGAN HEBARD 167 



of general type found in Brarlynofes, small furcula present as in 

 two of the species of that genus. Female ovipositor valves fully 

 exposed. 



Argiacris rehni^* new species (Plate VIII, fig. 18.) 



This distinctive insect is obscurely colored,, except for the bril- 

 liant pink of the internal faces of the caudal femora ventrad and 

 of the caudal tibiae. 



Type. — cT ; Livingston, Park County, Montana. Elevation, 

 5000 feet. July 29, 1909. (Rehn and Hebard.) [Hebard Col- 

 lection, Type No. 480.] 



Size large, form very robust. Head with interocular space half as wide as 

 length of one of the eyes; eye small, moderateh- protuberant, three-quarters 

 as long as cheek. Pronotum with disk moderateh' convex; medio-longitudinal 

 carina weakly defined only on metazona; transverse sulci not deep; caudal 

 margin broadh' obtuse-angulate produced with apex broadly rounded. Teg- 

 mina very broadly lanceolate, considerablj- shorter than pronotimi, sutural 

 margins attingent proximad (in the series varying from slightly overlapping 

 to separated by a brief interval), apices acute and sharply rounded. Furcula 

 represented by two minute rectangulate projections with angles rounded, 

 separated l>y a space slightly wider than one of these projections. Supra-anal 

 plate simple, triangularly shield-shaped, lateral margins convergent and feebly 

 convex to the rather acute apex; surface concave each side of the medio- 

 longitudinal sulcus, which is bounded bj- rather decided lateral carinae to near 

 the apex of the plate. Cercus simple, about two and one-half times as long 

 as basal width, tapering decidedly in proximal half, distal half showing a 

 moderate flexure dorsad, widening very feebly then very slightlj- and gradually 

 narrowing to the broad, rounded apex. Subgenital plate of the general t\-pe 

 usual in Bradynotes, but with an acute-conical projection meso-dorsad on the 

 free margin. Prosternal spine short, heavj', acute-conical. Interspace between 

 mesosternal lobes distinctly longer than least (proximal) width. Limbs robust. 



Allotype. — 9 ; same data as type. [Hebard Collection.] 

 Similar to male except in the following features. Size larger, form more 

 roi)ust. Interocular space with width about two-thirds length of eye. Eye 

 about three-fifths as long as cheek. Tegmina separated by a brief interval 

 (width of this interval individually moderately variable). Ovipositor valves 

 fulh- exposed. Prosternal spine very short and heavy, with apex acute and 

 sharply rounded. Interspace between mesosternal lobes with length contained 

 about one and one-third times in least width. 



^^ In honor of our friend and fellow-worker, Mr. James A. G. Rehn, for whom 

 both personally and scientifically we have the highest regard. 



TRANS. AM. ENT. SOC, XLIV. 



