FAMILY v.— ACKIDIIN^. 177 



slightly prominent, a little more so in the male than the 

 female. Pronotum rather long, nearly equal, broadening a 

 very little posteriorly, transversely arched, with a scarcely 

 perceptible median tectiform carina and well rounded lat- 

 eral margins ; the hind scarcely longer than the frontal lobe; 

 the hind border delicately marginate, obtuse angled; pro- 

 sternal thorn rather long, conical, compressed, bluntly 

 pointed, meso- and metastethia together much longer than 

 broad. Tegmina and wings reaching the tip of the ab- 

 domen. Femora as long as the abdomen, the superior 

 carina slight, unarmed; hind tibiae slender, the spines of 

 either side of equal length, scarcely diverging, the upper 

 lateral margins smooth and rounded ; first joint of hind 

 tarsi scarcely longer than the third, the second small, w^ith 

 a large inferior apical lobe; pulvillus large, nearly twice as 

 long as broad. 



Hesperotettix pratensis Scudder. 



(pale-green locust.) 



Head yellowish-green, sparsely punctate with fuscous in 

 front, the lower portion of the face more or less obscured 

 with purplish, a short fuscous stripe depending from the 

 eye, in front of which the callosity is livid ; vertex with a 

 more or less distinct, rather narrow, fuscous or blackish 

 stripe, narrowing anteriorly, and ordinarily with a median 



thread of yellow, the 

 fastigium generally 

 discolored, sometimes 

 and especially in the 

 female reddish. Pro- 

 notum scarcely (male) 



Pie. 107. — Hesperotettix pratensis, female. "^ 



0'''g'°^i- or slightly (female) in- 



creasing in breadth from the front backward, equally 

 throughout and with no angle in the middle, yellowish- 

 green. Tegmina of about the length of the abdomen in 

 both sexes, green or yellowish green. Legs green, the fore 



