330 FAMILY VI. ACRIDIDJE. THE LOCUSTS. 



front half directed upward; tegmina variable in length, in our 

 eastern species usually shorter than abdomen; fore and middle 

 femora of male swollen ; hind femora slender, surpassing abdomen 

 in both sexes, strongly so in male ; subgenital plate of male entire, 

 but with a small subapical tubercle; furcnla present as distinct 

 projecting lobes; valves of ovipositor strongly exserted. 



Scudder (1897, 56) recognized eight species of Hesperotettix 

 from the United States and Mexico. Kirby (1910, 498) accredits 

 12 species to the genus. Two more have been recently described 

 by Hebard. Of the 14 nominal species, five species and one va- 

 riety are recognized from the Eastern States. 



KEY TO EASTERN SPECIES OF HESPEROTETTIX. 



a. Prozona of pronotum smooth or very sparsely punctate, nowhere ru- 

 gulose; metazona punctate; disk of pronotum feebly tectiform. 

 b. Tegmina fully twice or nearly twice as long as pronotum. 



c. Dorsal face of hind femora without dark bars; larger, length 



of body, male, 15.5 18.5 mm. 



d. Hind margin of metazona broadly rounded; prosternal spine 

 short, stout, conical; tegmina and wings abbreviated, cov- 

 ering about two-thirds of abdomen. 144. BREVIPEXNIS. 

 del. Hind margin of metazona obtuse-angulate; prosternal spine 

 longer, more slender, subcylindrical, its tip rounded; teg- 

 mina and wings usually surpassing the abdomen, male, 

 only reaching its tip, female. 145. PRATENSIS. 

 cc. Dorsal face of hind femora (in living specimens) with two 

 faint dark cross-bars; smaller, length of body, male, 14.5 

 15.5 mm.; hind margin of metazona and length of tegmina 

 as in pratensis. 145a. GEMMICULA. 

 l)b. Tegmina shorter than pronotum; hind femora without dark 

 cross-bars. 146. OSCEOLA. 

 aa. Prozona and metazona both on disk and lateral lobes distinctly rugu- 



lose; pronotum more obviously, not strongly, tectiform. 



e. Tegmina elongate, three to five times as long as broad, their 



inner edges overlapping. 147. SPECIOSTJS. 



ee. Tegmina ovate, at most one and a half times as long as broad, 



their inner edges scarcely meeting and dorsal and lateral areas 



not defined. 148. FLORIDENSIS. 



144. HESPEROTETTIX BREVIPENNIS (Thomas), 1874, G7. Northern Pur- 

 ple-striped Locust. 



Small, rather stout, not strongly compressed. General color pea- 

 green; median carina of pronotum and a narrow stripe along only the 

 outer margin of dorsal area of tegmina, purplish-red; femora and apical 

 third of hind tibiae more or less suffused with the same hue; antennae pale 

 red, the tips darker; a short stripe below the eye, a broad one on upper 

 third of prozonal lateral lobe, a spot on vertex, sides of knees and some- 

 times in part the outer face of hind femora, fuscous. Fastigium very 

 slightly concave in front of eyes and with a minute concavity between 



