Grasshoppers of Kansas. 9 



is neither granulate nor dentate at the anterior angles, the extremity of 

 the abdomen of the male generally more or less clavate and removed, the 

 supra-anal plate not tuberculate, with a basal medial sulcus, a furcula 

 usually present, the cerci very variable, rarely longer than the supra- 

 anal plate, straight or gently curved, never abruptly recurved basally, 



generally compressed at least in part, often , but with no indirected 



median spine. — 1. c. Scudder. 



Key to the Genera of Melanopli. 



A 1 . Lateral margin of subgenital plate of male, as seen laterally, straight throughout, or 

 very slightly convex, never at all abruptly ampliate at the base; tegmina always 

 abbreviate. 



b 1 . Head not prominent, the summit very slightly arched longitudinally ; prosternal 

 spine erect; furcula of male composed of projecting cylindrical fingers; surface 



of body feebly pilose Hypochlora. 



b 2 . Head prominent, the summit strongly arched longitudinally ; prosternal spine 

 more or less retrorse; furcula of male reduced to slight, scarcely projecting lobes; 



surface of body rather densely pilose Oampylacantha. 



A 2 . Lateral margin of subgenital plate of male suddenly ampliate to a considerable degree 

 at the base, or if not to a considerable degree, then the entire margin rather 

 strongly convex or sinuate. 



b 1 . Subgenital plate of male furnished with a distinct subapical tubercle (I. e., one 

 in which the apical margin does not pass through and form part of the summit 

 of the tubercle, but where it is distinctly separate from that summit), but not 

 otherwise tumescent. 



c 1 . Body relatively slender and compressed, not much enlarged at the meta- 

 thorax, particularly in the male; disk of pronotum tectiform, the prozona 

 not distinguished from the metazonp, either by its plane or by any lack of 

 the median carina, which latter is generally marked in color ; pronotum 

 fully half as long as broad; hind femora long and slender; apical tubercle 

 of male abdomen prominent; furcula present as distinctly projecting lobes; 

 terminal segment of female abdomen not abbreviate, the ovipositor fully 



exserted Hesperotettix. 



c 2 . Body relatively short and stout, considerably enlarged at the metathorax, 

 even in the male, disk of pronotum gently convex transversely, the prozona 

 slightly and independently tumid with no median carina, thus distinguishing 

 it from the metazona; hind femora relatively short and stout; apical tubercle 

 of male abdomen not very prominent; furcula scarcely or not apparent; 

 terminal segments of female abdomen abbreviate, the ovipositor only par- 

 tially exserted JEoloplus. 



b 2 . Subgenital plate of male with no distinct subapical tubercle, but often apically 

 prolonged or tumescent. 



c 1 . Head not large in proportion to pronotum, not prominent, but little longer 

 above than prozona except when the latter is transverse, the intercalary 

 veins of the discoidal area rather numerous. Cerci of male very variable. 



Melanoplus. 



c 2 . Head large in proportion to pronotum, and prominent, nearly half again as 



long above as the prozona. Intercalary veins few and indefinitely marked; 



cerci of male styliform: subgenital plate of male very narrow. .PJuctaHotes. 



Hypochlora. 



Body slender, compressed, very thinly pilose. Head not prominent, the 

 summit gently arched, the fastigium descending with moderate rapidity, 

 the face retreating considerably; interspace between the eyes broad, the 

 fastigium scarcely sulcate, the frontal costa rather narrow, not nearly so 

 broad as the space between the eyes, sulcate, percurrent, and subequal; 

 eyes moderate in size, not very prominent, similar in the two sexes, about 



