No. 34-] HEMIPTERA OF CONNECTICUT: CICADELLIDAE. 153 



E. obtusa Walsh. (Fig. 14, 4a, b.) 



Proc. Bost Soc. Nat. Hist, ix, 316, 1864. 



Resembling unicolor, vertex obtusely rounded not strongly pro- 

 duced, greenish with tips of elytra hyaline. Female segment 

 produced but without notch. Length 4 mm. 



Common on willows in early spring and summer. 



New Haven, 8 Aug., 1920 (B. H. W.), on Salix; 18 July, 3 Oct., 1920 

 (B. H. W.) ; Orange, 17 July, 1920 (B. H. W.) ; Guilford, 13 July, 1920 

 (B. H. W.). 



E. aureoviridis (Uhler). Typhlocyba aureoviridis Uhler. 



Bull. U. S. Geol. Geog. Surv., iii, 474, 1877. 



More robust than obtusa with a more rounded and less produced 

 vertex. Color yellowish green to golden yellow, a pale spot behind 

 each eye on pronotum, often a median line extending across scutel- 

 lum. Female segment strongly produced and notched or slightly 

 incised on either side. Length 5 mm. 



A common willow species and rather widely distributed. 



New Haven, 3 Oct., 1920 (B. H. W.). 

 E. unica (Provancher). Typhlocyba unica Provancher. E.splen- 

 dida Gillette. 



Pet. Faune Ent. Can., iii, 340, 1890. 



Vertex slightly produced, orange-yellow anteriorly, deep blue 

 posteriorly. Pronotum reddish orange anteriorly, and bluish pos- 

 teriorly. Elytra reddish with a rather broad blue stripe along 

 claval and costal veins, apex smoky subhyaline, a black spot before 

 cross nervure of apical cell. Length 3.5 mm. 



Common on alder which is its food plant. 



New Haven, 20 July, 191 1 (A. B. C.) ; 22 Sept., 1918 (D. M. D.) ; 

 4, 7, 8, 9 July, 1 Aug., 22 Sept.,, 1920 (B. H. W.) ; Portland, 8 Aug., 1913 

 B. H. W.) ; Huntington, 9 July, 1920 (B. H. W.) ; Hamden, 5 July, 1920 

 (P. G.). 



E. atrolabes Gillette. 



Proc. U. S. Nat. Mus., xx, 736, 1898. 



Similar to unica with duller colors, greenish golden marked with 

 blue, segment bearing a square, abrupt notch. Elytra marked as 

 in unica and with black spot before cross nervures. Length 

 3.5 mm. 



Found on alder throughout the summer in company with the 

 preceding. 



New Haven, 3 July, 1920 (B. H. W.). 

 E. pergandei Gillette. 



Vertex rounded, not produced, pale yellowish green, pronotum 

 with whitish mottling and a broad white line on scutellum, a black 

 spot on each elytron before cross nervure of inner apical cell. 

 Female segment with a rather broad, gradually sloping U-shaped 

 notch. Length 3.75 mm. 



