220 



THE UNIVERSITY SCIENCE BULLETIN. 



Distribution: This is our commonest member of the genus. 

 It is found all over the state, as shown by the following map : 



Chlorotettix unicolor (Fh.). 



Bythoscopus unicolor Fh., Homop. N. Y. St. Cab., p. 58, 1851. 

 Jassus unicolor Uhl., Bui. U. S. Geol. Geog. Surv., iv, p. 511, 1878. 

 Orypotes unicolor Uhl., Stand. Nat. Hist., ii, p. 246, 1884. 

 Thamnotettix unicolor Harr., Ottawa Nat., vi, p. 32, 1892. 

 Athysanus unicolor Southw., Science, xix, p. 288, 1892. 

 Chlorotettix unicolor Van D., Psyche, vi, pp. 306, 308, 1892. 

 Chlorotettix vanduzei Bak., Can. Ent., xxx, p. 219, 1898. 

 Chlorotettix unicolor Osb., 20th Rept. N. Y. St. Ent., p. 538, 1905. 

 Chlorotettix unicolor Osb., Me. Agr. Exp. Sta., Bui. 238, p. 144, 1915; Bui. 248, p. 

 76, 1916. 



Chlorotettix unicolor Van D., Cat. Hemip. N. A., p. 685, 1917. 

 Chlorotettix unicolor Fent., Ohio Jl. Sci., xviii, p. 185, 1918. 

 Chlorotettix unicolor DeL., Ohio Jl. Sci., xviii, p. 227, 1918. 

 Chlorotettix unicolor DeL., Ohio St. Univ. Bui., xxiii, p. 13, 1919. 



Form: One of our largest species. Length, 6.75 to 8 mm. Vertex 

 slightly longer at middle than next the eye, two and one-half times as 

 broad as long, broadly rounding with front. Pronotum short, over twice 

 as broad as long, anterior margin broadly but not strongly convex, short 

 lateral margins rounding vdth the humeral margins, posterior margin 

 distinctly emarginate. Elytra long, greatly exceeding the abdomen. 



Color: Almost uniformly pale green or yellowish-green. Elytra hya- 

 line, the nervures often dark green in color. 



External genitalia: Female, last ventral segment nearly twice as 

 long as the preceding, with a fairly broad median notch the apex of 

 which is surrounded by a brown spot, the posterior margin sinuate on 

 either side of the notch; pygofers rather long, spiny, slightly exceeding 

 the ovipositor. Male, valve broad, posterior margin somewhat sinuate 

 on either side of the obtuse, nearly truncate apex; plates broad basally, 

 submarginally spined margins concave on apical half, tips produced, sub- 

 acute, slightly diverging, greatly exceeded by the pygofers. 



