174 



FAMILY V. TETRIGID-aS. THE GROUSE LOCUSTS. 



From M. feinoratus, its nearest ally, bolteri is easily recog- 

 nized by its slightly more bulky form, the more convex and prom- 

 inent frontal costa, larger eyes, higher lateral carinse of pronotum 

 behind the eyes, and especially by the prominent tubercles on the 

 surface of the front dorsal half of pronotum. The tegmina are 

 shorter and broader, the upper notch of lateral lobe of pronotum 

 more shallow, and the median lobe more rounded than in femo- 

 ral us. 



72. NEOTETTIX PROAVUS Rehn & Hebard, 1916, 139. Forked-face Grouse 

 Locust. 



Rather large, compressed. Color variable, usually fuscous-black or 

 dark brown with an oblique velvety black ti'iangular spot behind each 

 shoulder; lateral lobes and hind portion of pronotum sometimes paler 

 brown, rarely uniform pale brown throughout; antennae annulate with 

 brown. Vertex about twice as wide as one of the eyes, concave each side 

 of its median carina; frontal costa with forks strongly diverging to the 

 antennal bases, then subparallel to the median ocellus. Eyes feebly flat- 

 tened, moderately prominent. Antennas short, 12-jointed. Pronotum 

 strorgly compressed, its crest distinctly curved in front of shoulders, less 

 so behind them; its front margin reaching middle of eyes; humeral angles 

 very obtuse; posterior process acute, not reaching tips of hind femora; dor- 

 sal surface with numerous small rounded tubercles or granules, these 

 larger between the shoulders. Wings abbreviate, two-thirds the length of 

 pronotum. Valves of ovipositor compressed, strongly toothed. Length of 

 body, $, 8.18.5, $, 9.910.4; of pronotum, $, 7.37.8, $, 8.5; of hind 

 femora, $ , 5 5.3, $ , 6 mm. 



Fig. 623. Ncotettix proai'tts R. & H. a. Female, side view, showing crested pronotum; 

 b, dorsal view of head and front part of pronotum; c, front view of head showing forked 

 frontal costa. (After Hancock.) 



Clarksville, Tenn., June 1925 (Fox). Taken by R. & H. at 

 Macon, Buckhead and Jasper, Ga., and Murphy, N. Car., July 25 

 August '2. These are the only records so far known. It is a very 

 distinct and aberrant species, strongly resembling Nomotettix cris- 



