AMERICAN ORTHOPTERA. Hi 



(34.) — Melanoplus atlanis Riley. 



Cdloptenus atlanis Riley, Ann. Rep. Ins. Mo., vii, 169 (1875). 



Stillwater, Okla., 1893. 



(35.) — Melanoplus bispinosus Scudd. 



Melanoplus bispinosus Scudd., Proc. Anier. Phil. Soc, xxxvi, 25, 34 (1897). 



One male, one female ; near Perkins, Okla., Aug. 16, 1901. 



(36.) — Melanoplus bivittatus Say. 



Gryllus bivittatus Say, Journ. Acad Sc. Pliilad., iv, 308 (1825). 



Stillwater, Okla., 1893. 



(37.) — Melanoplus diflferentialis Thorn. 



Acridium differentialis Thom., Trans. 111. State Agric. Soc, v, 450 (1865). 



Very common all over Oklahoma and Indian Territory. 



(38.) — Melanoplus inconspicuus n. sp. — General color testaceous, paler be- 

 neath. Head not prominent, not elevated above tlie thorax, with a black post- 

 ocular band. Interspace between the eyes slightly wider than the basal segment 

 of the antennae. Fastigium steeply declivent, broadly sulcate. Frontal costa 

 percnrrent, shallowly sulcate at and below the ocellus, coarsely punctate through- 

 out. Eyes moderately prominent. Antennae light reddish brown, darker on 

 outer third. Pronotum with a shiny black band bordering the upper half of the 

 lateral lobes, broader behind. Disk broadly convex, passing with a narrowly 

 rounded angle into the subperpendicular lateral lobes. Median carina percur- 

 rent, slight but distitict. Front margin of the pronotum truncate, inconspicu- 

 ously emargiuate, posterior margin obtusely and roundly angulate. Prozona 

 sliglitly longer than the metazona. The sides of the metathorax below the base 

 of the wings are black with a prominent light-colored carina extending obliquely 

 across them from the hind coxial cavities to the humeral angle. Prosternal 

 spine extraordinarily large, almost bulbous and strongly retrorse. Interspace be- 

 tween the mesosternal lobes quadrate. Tegmina abbreviate, as long as the pro- 

 notum, moderately broad, overlapping and narrowing rapidly to a narrowly 

 rounded apex. Posterior femora pale testaceous, a little darker above and with 

 dusky genicular arcs. Hind tibiae testaceous, spines black nearly to the base, 

 twelve in number in outer series. Abdomen compressed, apex not swollen. 

 Supraanal plate triangular, mesially sulcate throughout, narrowly and deeply 

 at base, broadly at apex. The borders of the sulcus and the margin of the 

 plate itself, especially the former, are considerably elevated. Just where the 

 sulcus commences to broaden posteriorily it is interrupted by a transverse ridge 

 and from that point backwards the tip is slightly inclined downwArds. Furcula 

 absent. Cerci moderately broad, narrowed considerably above in basal third, 

 apically rounded and broadly sulcate, the entire cerci gently incurved, the ex- 

 treme tips, however, parallel. Subgenital plate with lateral margins meeting 

 with a rounded curve, not noticeably tuberculate. Length of body, 20 mm.; an- 

 tennae, 8.5 mm. ; pronotum, 5 mm. ; tegmina, 5.5 mm. ; posterior femora, 12 ram. 



TRANS. AM. ENT. SOC, XXVIII. FEBRUAKY, 1902. 



