SUBFAMILY I. TRYXALIN^E. 195 



1)1). Prosternum with a distinct tubercle or low transverse ridge be- 

 tween the front coxae; lower margin of lateral lobe straight or 

 feebly sinuate throughout its length; sides of fastigiuni straight 

 or slightly curved, its apex usually feebly rounded or more or 

 less acuminate. 



e. Vertex with a distinct median carina; tegmina and wings usu- 

 ally much shorter than the abdomen; outer carina of hind 

 tibia? with 14 17 spines; male with a stridulating rasp on 

 hind femora; subgenital plate of male conical, more than 

 twice as long as wide at base (Fig. 83, c.) ; sides of head and 

 pronoturu normally without a brown stripe. 



III. PSEUDOPOMALA. 



cc. Vertex at most with only a faint trace of a median carina; teg- 

 mina and wings reaching or exceeding tip of abdomen; outer 

 carina of hind tibiae with 18 22 spines; male without stridu- 

 lating rasp on hind femora; subgenital plate of male usually 

 scarcely longer than wide at base; sides of head and prono- 

 tum with a reddish or dark-brown postocular stripe. 



IV. MERMIRIA. 



I. KADINOTATUM McNeill, 1897, 199. (Gr., "a very slender thing.") 



Form very slender, subcylindrical, compressed ; head elongate, 

 ascending; vertex projecting in front of eyes a distance equal to 

 length of eyes, its sides broadly flattened, disk concave and with 

 a long, distinct median carina, apex rounded or subangulate ; face 

 very strongly oblique, its frontal costa high and narrow between 

 the antennae, lower and somewhat wider below them, its sulcus 

 distinct but shallow; eyes very long, their upper surface nearly 

 horizontal; antennae triquetrous, strongly tapering; pronotum 



much shorter than head, 

 its carinse distinct and 

 parallel, lateral lobes 

 vertical, their front mar- 

 gin strongly oblique, low- 

 er one nearly straight, 

 hind one broadly emar- 



Fig. 73. Mate. X i.s. (After R.\ H.) ginate ; tegmina and 



wings rudimentary; sub- 

 genital plate of male longer than thorax, lanceolate, acute; hind 

 femora very slender, shorter than abdomen, female, reaching base 

 of subgenital plate, male, their knees with apical angles strongly 

 produced, the outer projection the shorter. One species is known. 

 80. RADINOTATUM BREVIPENNE (Thomas), 1873, 58. Long-headed Locust. 



Pale brown or grayish-brown, the upper surface, tegmina and legs of- 

 ten in part green. Antennas slightly shorter than head and thorax, female, 



