172 



A. emarjfHsn^tun, Ulilcr, in Scudd. Notes Geol. Siirv. Neb., 250. 



Closely allied to A. alutaceum, Harr., which it rcsciiihles very much. 



Frontal costa sparsely punctured ; lateral carince of the face slightly 

 divergent. Pronotuni densely, and on the anterior lobes coarsely, punctured; 

 posterior lobe expanding moderately. Elytra passing the abdomen one-fourth 

 their length ; nervules prominent. Posterior femora about as long as the 

 abdomen. Prosternal point stout, cylindrical, obtuse, slightly bent backward. 

 Cerci very broad, somewhat notched at the apex ; sub-anal plate with a 

 broad, square notch at the apex. Pulvilli remarkably large, oblong-ovate. 



Color. — A pale reddish-brown, tinged with green. A distinct, yellow 

 stripe reaches from tlie vertex to the tip of the pronotum, and extends upon 

 the suture of the elytra. A row of distant, black punctures on each margin 

 of the frontal costa, and a row across the upper part of the clypeus. Palpi 

 and antennas yellow. Sides of the pronotum sparsely sprinkled with yellow 

 dots. Elytra translucent, pale red dish- brown; nerves darkest. Wings trans- 

 parent, tinged with greenish-yellow at the base; nerves and nervules dull- 

 yellow, darkest near the middle of the outer border, slightly tinged with red 

 near the anterior border. Anterior and middle legs greenish externally, 

 striped with black internally. Posterior femora pale-green ; upper margin 

 of the disk marked with a row of black dots. Posterior tibiae with the inner 

 face black ; outer face greenish-purple. Posterior margin of each abdominal 

 segment marked with a i-ing of l)lack dots. 



Dimensions. — 9 Length, 1.5 inches; elytra, 1.3 inches; hind femora, 

 0.8 inch. 5 Length to tip of elytra, 1 .4 inches. 



Colorado, Nebraska, Dakota (Thomas). 



A. aiuericaiinin, Scudd., Bost. Jour. Nat. Hist., VII, 466. — Thos., Trans. 



• 111. St. Ag. Soc, V, 448, 452. 

 Syu., Orylhis americanus, Drury, 111. II, App. Descr., and Fig. 1, 128, PI. 49, Fig 

 2 (ed. 1773). 

 Locusta tartarica, West, in Drury 111., I, 121, PI. 49, Fig. 2 (ed. 1837). 

 ■ Acridiwn rustiemn, Prof. Glover's Fig. 15, PI. I. lu Drury, 111. Xat. 

 Hist., ed. 1770, 128 ; it is described and figured (PI. 49, Fig. 2), with- 

 out name. 



Female. — Large size. Vertex hexagonal, with a central depression ; 

 frontal costa solid and somewhat prominent above the ocellus, sulcate at the 

 ocellus, sides nearly parallel. Eyes elongate-oval, rounded behind, straight 



