2l8 DAVENPORT ACADEMY OF NATURAL SCIENCES. 



In part, Stenobothrus, Thos., 1873. Syn. Acrid. N. Am., 80. 



In part, Gonphocerus, Thos., 1873. Syn. Acrid. N. Am., 96. 



Eritcttix, Bruner, 1889. Proc. U. S. Nat. Mus., XII, 56. 



This genus docs not seem to have been known to Briinner, as there is 

 nothing in his key to fit ic. It falls near his South American genus 

 Toxopterus, but is very distinct from that. It appears to be a purely 

 North American genus, therefore, and the species that belong to it are 

 widely distributed. 



Key to Eritettix, Bruner. 



A.' Lateral carinas of the pronotum straight or very gently arcuate. 

 Oblique carina of the lateral lobes very slender or nearly obso- 

 lete. Disk of the pronotum furnished with two narrow or broad, 

 black, velvety stripes just inside of the lateral carinae. 



B.' Supplementary carinas of the pronotum about as strong as the 

 median. Space between the supplementary carina carneous or 

 brown, and the space between the supplementary carinas and 

 eyes and lateral carinre velvety black. 



C' Antennae clavate. 



D.' Wings hyaline i. — Jl'rgafi/s, Scud. 



D.2 Wings fuliginous 2. — Carinatiis, Scud. 



C.2 Antennae acuminate, not clavate 3. — ]\xriabilis, Brun. 



B.2 Supplementary carina; of the pronotum much weaker than the 

 median or obsolete. Space between the supplementary carina; 

 little if any darker than the median space. 



C' Tegmina with the posterior half green or brown with a light ) el- 

 low or green stripe in the scapular area extending from the base 

 to the middle 4. — Tricarinatiis, Thos. 



C.^ Tegmina testaceous 5. — Simplex, Scud. 



A. 2 Lateral carina; of the pronotum moderately arcuate before the 

 middle. Oblique carina of the lateral lobes very heavy and 

 generally white or light colored, at least on the apical half. 



B.' Tegmina as long as or longer than the abdomen 



6. — Naviculus, Scud. 



B.2 Tegmina abortive, a little (male) or not (female) more than half 

 as long as the abdomen 7. — Abor/ivus, Bruner. 



2. Eritettix vir(;atus, Scud. Fig. 9a, 9b. 



Gomphocerus virgatus, Scud., 1875. Cent. Orth., 23. 

 Goinphocerus virgatus, Bruner, 1883. 3rd Rept. Ent. Com., 56. 



