no CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



for Connecticut is perhaps the most northern. It occurs on grasses 

 in moist places, often along stream margins. 



New Haven, ii July, 1920, 2 July, 1922 (B. H. W.) ; Hamden, 20 Aug., 

 1922 (B. H. W.). 



D. compactus Osborn and Ball. 



Proc. la. Acad. Sci., iv, 217, 1897. 



Very short and broad, vertex broader than long, elytra scarcely 

 exceeding abdomen, in the female surpassed by the ovipositor. 

 Vertex marked with a transverse interrupted band between eyes 

 and four black points, often pale, just above margin. Elytral 

 cells margined with fuscous. Clavus reticulate veined. Female 

 segment deeply concavely excavated, concealed except at lateral 

 angles by a convexly rounding membrane. Male plates broad at 

 base narrowed to pointed attenuated tips. Length 2.25 mm. 



Found in company with obtectus on short grasses in high, well- 

 drained pastures from June to September. 

 D. obtectus Osborn and Ball. (Fig. 11, 2.) (PI. iii, 3.) 



Proc. Dav. Acad. Sci., vii, 78, 1898. 



Resembling compactus but longer, elytra considerably surpassing 

 abdomen. Vertex broader than long with interrupted dark band 

 before eyes and four small black spots behind margin. Spots 

 behind eyes on pronotum and basal angles of scutellum black. 

 Elytra pale, conspicuous dark margins and spots on cells black or 

 dark brown. Female segment concavely excavated, almost con- 

 cealed by median membrane roundingly produced with a shallow 

 notch either side of small median tooth. Length 3 mm. 



Reported from Massachusetts and feeds in rather high pastures 

 on short grasses. It seems to prefer this dry habitat where the 

 land is well drained, and is common in a Danthonia association 

 from June throughout the summer. 



New Haven, 11, 31 July, 22 Sept., 1920 (B. H. W.) ; Guilford, 31 July, 

 1920 (B. H. W.). 



D. vinnulus Crumb. 



Ann. Ent. Soc. Amer., viii, 192, 191 5. 



In form resembling weedi, vertex bluntly angled, about as long 

 on middle as basal width between the eyes. Elytra rather broad, 

 outer clavus with very few reticulate veins. Vertex pale yellow, 

 black markings from front extending on to vertex and forming 

 a triangular spot on either side of apex, and a broken black band 

 extending transversely across between anterior margins of eyes 

 forms a white cross on anterior portion. Elytra olive, subhyaline, 

 veins whitish, sometimes narrowly fuscous margined. Face 

 black above with pale arcs. Female last ventral segment with 

 lateral margins strongly emarginate from the base, lateral angles 

 rounded to posterior margin which is bisinuate forming three 

 lobes, the central one the smallest. Lateral membranes are 

 present. Male valve triangular, plates twice longer than valve. 



