No. 34-] HEMIPTERA OF CONNECTICUT I CICADELLIDAE. 115 



striatus Linnaeus (affinis Gillette and Baker). An examination 

 of the type has proven that this species is distinct, and is the same 

 as vicilinus described by Crumb in 191 5. 



New Haven, 8 Oct., 1902. (B. H. W.) ; 7, 11 July, 1920 (B. H. W. ; 

 Hamden, 5 July, 1920 (P. Garman) ; North Branford, 12 June, 1921 

 (B. H. W.). 



D. sylvestris Osborn and Ball. (Fig. 11, 4a, b, c, d.) (PI. 

 iii, 6.) 



Proc. la. Acad. Sci., iv, 213, 1897. 



Vertex longer than width between eyes, acutely angled, dull 

 greenish with a curved line. from apex toward each ocellus, and a 

 longitudinal stripe either side of middle, fuscous. Elytra rather 

 long, greenish subhyaline, nervures pale, often slightly fuscous 

 margined. Female segment abruptly produced and black on 

 median third. Male plates long, concavely rounded to blunt 

 apices. Length 3.5 mm. 



Feeds in waste places and sheltered areas, on short grasses 

 during June, July and in late summer. 



New Haven, 22 Sept., 1918 (F. H. L. and D. M. D.) ; 11 July, 1920 

 (B. H. W.) ; North Branford, 2 June, 1921 (B. H. W.). 



D. acus Sanders and DeLong. 



Penn. Bur. PI. Ind., Tech. Bull. No. 1, 10, 1920. 



Vertex sharply angled, one- fifth longer on middle than width 

 between eyes. Greenish yellow, an arcuate line from apex to eye, 

 pale brown. Elytra milky hyaline, veins paler, faintly bordered 

 with fuscous. Female last ventral segment slightly longer than 

 preceding, hind margin with median half produced, forming a 

 broad pointed tooth with sinuate sides, margined with brown. 

 Male valve triangularly rounded, as long as, but narrower than, 

 last ventral segment. Plates at base as broad as last ventral seg- 

 ment, twice length of valve, concavely narrowed to round pointed 

 tips. Length 4 mm. 



An abundant and widespread species found in grassy and 

 swampy areas and which apparently has been confused for some 

 time with melsheimerii and nominatus, both of which it resembles. 



New Haven, July 11, 1920 (B. H. W.). 

 D. simplex Van Duzee. 



Trans. Am. Ent. Soc, xix, 304, 1892. 



Vertex at least one-third wider than long, very bluntly and 

 obtusely angled, greenish yellow with four black spots just back 

 of margin, a pair of triangular spots at apex and one next either 

 eye just above ocellus. Elytra rather long, dull green or whitish, 

 veins bright green. Female segment with lateral lobes rounded, 

 excavated either side of broad median tooth. Portions of under 

 segment visible at the sides. Male plates very broad at base, con- 

 cavely, abruptly narrowed at half their length to elongated pointed 

 tips. Length 5-5.5 mm. 



