106 FAMILY v.— GROUSE LOCUSTS. 



b. Vertex of fastigium generally broader than the eyes, 

 projecting beyond them, generally angulate ante- 

 riorly Tettix. 



bh. Vertex of fastigium narrower than the eyes, and 

 not projecting beyond them, usually truncate 



anteriorly Paratettix. 



The genus Tetti^idea is the onl}^ one found in Minnesota 

 that belongs to the Bairachideee. 



GENUS Nomotettix Morse (1894). 

 Lateral lobes of the pronotum with the postero-dorsal 

 sinus shallow, about one-half the depth of the antero-ventral 

 sinus. Pronotum advanced upon the head, rather sharply 

 tectiform. Occiput of head with a pair of nipple-like or 

 mammillate protuberances between the posterior portion of 

 the eyes and the median line. 



Nomotettix parvus Morse. 

 Small. Vertex of head projecting in advance of e\'es 

 about two-thirds the length of an eye, the anterior margin 

 obtuse-angulate, its sides straight, rounding shortly into 

 sides of crown, the mid-carina showing from above as a very 

 small, slightly projecting tooth. Mid-carina low on the 

 crown, disappearing opposite the middle, or middle of the 

 posterior half, of the e3'es. Profile rounded or round-angu- 

 late at top, deeply excavate opposite eye, sub-protuberant 

 opposite lower border of eyes, the face more retreating than 

 in cristatus. Sides of crown sub-parallel, slightly excavate 

 opposite anterior portion of eyes. Mammilla of occiput 

 scarcely distinct, pronotum sharply tecti- 

 form, the mid-carina lower and less arched 

 longitudinally than in cristatus; anterior 

 margin of dorsum projecting but little 

 over the head, obtuse-angled, the sides 

 straight or very slightly excavate. Sur- 

 face scabrous. 



Fig. 62. — Nomotettix ^. . ^ U' U n f TV/T 



parvus. Original. 1 hc Specimens Iroui which Proi. Morsc 



described this interesting insect were 



