240 THE UNIVERSITY SCIENCE BULLETIN. 



Empoasca trifasciata Gill. 



Empoasca trtfasciata Gill., Proc. U. S. Natl. Mus., xx, p. 726, 1898. 

 Empoasca trifasciata Osb., 20th Kept. N. Y. St. Ent., p. 542, 1905. 

 Empoasca trifasciata DeL., Tenn. St. Bd. Ent., Bui. 17, p. 99, 1916. 

 Empoasca trifasciata Van D., Cat. Hemip. N. A., p. 702, 1917. 

 Empoasca trifasciata Weiss & Dick., Can. Ent., L, p. 201, 1918. 

 Empoasca trifasciata Weiss, Ent. News, xxix, p. 310, 1918. 



Form: Length, 4 to 4.25 mm. Vertex very slightly longer at middle 

 than next the eyes, obtusely rounded apically, twice as wide as long. 

 Pronotum long, one-half wider than long, lateral margins long, widening 

 posteriorly, humeral margins shorter, posterior margin slightly emargi- 

 nate. Elytra very long, greatly exceeding abdomen. 



Color: Greenish. Vertex greenish-yellow. Pronotum yellowish an- 

 teriorly, with a dark brown band on the posterior part. Scutellum yel- 

 lowish basally, greenish apically. Elytra greenish, with broad smoky or 

 brownish bands across middle of clavus and at apex. Face yellowish 

 above, greenish below, sometimes with a white median longitudinal line. 



External genitalia: Female, last ventral segment long, posterior mar- 

 gin roundingly produced medially; pygofers moderately robust, long, 

 slightly exceeded by ovipositor. 



Distribution: Douglas and Riley counties seem to be the only 

 counties in the state where this species has yet been taken. 



Hosts: Weiss and Dickerson give Carolina and Lombardy 

 poplars as hosts. 



Empoasca obtusa Walsh. 



Empoasca obtusa Walsh, Proc. Bost. Soc. Nat. Hist., ix, p. 316, 1864. 



Empoasca obtusa G. & B., Hemip. Colo., p. 109, 1895. 



Empoasca obtvsa Gill., Proc. U. S. Natl. Mus., xx, p. 733, 1898. 



Empoasca obtvsa Webs., Ent. News, xxi, p. 265, 1910. 



Empoasca obtusa Osb., Me. Agr. Exp. Sta., Bui. 238, p. 153, 1915. 



Empoasca obtusa Leon., Ent. News, xxvii, p. 49, 1916. 



Empoasca obtusa DeL., Tenn. St. Bd. Ent., Bui. 17, p. 100, 1916. 



Empoasca obtusa Van D., Cat. Hemip. N. A., p. 703, 1917. 



Empoasca obtusa McAt., Can. Ent., L, p. 360, 1918. 



Empoasca obtusa Lathr., S. C. Agr. Exp. Sta., Bui. 199, p. Ill, 1919. 



Form: Rather robust. Length, 4 mm. Head broad; vertex slightly 

 longer medially than next the eye, over twice as wide as long, broadly 

 rounded apically. Pronotum long, less than twice as wide as long, lateral 

 margins long and widening posteriorly, humeral margins short, posterior 

 margin distinctly emarginate. Elytra long and narrow, greatly exceed- 

 ing the abdomen. 



Color: Pale green or yellowish-green. Vertex sometimes marked with 

 fuscous. Pronotum usually with three fairly large white spots on ante- 

 rior margin, and sometimes the posterior margin marked with bright 

 green. Scutellum frequently with a broad white median line. Elytra 

 yellowish or greenish, subhyaline, sometimes smoky and with some of the 

 nervures bright green. 



