106 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



22. Female segment with median third abruptly produced and trun- 



cated; male plates with tips quite broad, bluntly pointed and 



divergent sylvestris 



Female segment with median half gradually produced to a pointed 

 brownish tooth ; male plates tapered to narrowly rounded tips . . acus 



23. Form narrow, vertex scarcely one-third wider than long, prono- 



tum not twice wider than long, central anteapical cell seldom 



divided by cross vein 24 



Form broader vertex one-third wider than long, pronotum more 

 than twice as wide as long. As a rule the middle anteapical cell 

 is constricted and divided by a cross vein 27 



24. Vertex not marked with black spots above margin 25 



Vertex with a row of four to six black spots above margin, face 



with dark arcs balli 



25. Color yellowish green, wings visible through subhyaline elytra ... 26 

 Color greenish often marked with black areas, face sometimes 



entirely black, elytra opaque, never subhyaline abdominalis 



26. Female segment concavely rounded posteriorly, male plates slightly 



exceeding valve, blunt at tips striatus 



Female segment triangularly produced from base, with median tooth 

 at apex, male valve transverse, plates short but acutely pointed 



littoralis 



27. Vertex rather strongly angled, four black triangular spots above 



margin, elytra greenish, unmarked simplex 



Vertex more obtusely angled with two or four black spots above 

 margin ; yellowish, elytra with veins margined with fuscous . . osborni 



D. areolatus Ball. (Fig. 11, 1.) (PI. iii, 1.) 



Can. Ent, xxxi, 188, 1899. 



Vertex one- third longer than width between eyes, acutely angled, 

 bright yellow with a curved black spot either side at apex. Face 

 usually entirely black. Elytra yellow, opaque, a large black spot 

 on disc and reflexed veins at apex broadly black. Venation rather 

 obscured except at apex where they are narrowly margined with 

 brown. Female segment strongly excavated with a rounded 

 median tooth. Length 3-3.5 mm. 



Occurs as a rule in dry, hot, often sandy areas on Panicum, as 

 adults during early summer and late fall. It has been found in 

 the sandy and coastal areas of New Jersey and undoubtedly is 

 distributed farther northward along the coast. 

 D. inflatus Osborn and Ball. 



Proc. la. Acad. Sci., iv, 202, 1897. 



One of the broad-headed members of the reflexiis group. 

 Vertex as wide between eyes as length at middle, rather broadly 

 angled. Yellowish with a few fuscous markings. Basal half of 

 face fuscous. Elytra usually flaring at tips, third apical cell 

 black and reflexed, nervures usually dark margined. Female seg- 

 ment emarginate with a rather broad produced central tooth 

 notched at middle, a black spot either side. Length 4.25-4.75 mm. 



A common pasture and meadow form feeding on grasses in low 

 areas and along swamp margins. Specimens are at hand from 

 Long Island, N. Y., and it occurs no doubt in Connecticut. 



