6o4 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [BuU. 



Polymerus opacus Knight, new species. 



Dorsum black, opaque, clothed with silvery and dusky, sericeous 

 pubescence; antennal segment ii of male equal in thickness to 

 segment i, slightly more slender in the female; legs black, coxae 

 and basal half of femora yellowish. 



Male: Length 4.3 mm., width 2 mm. Head: Width .91 mm., 

 vertex .46 mm. ; black, a small yellowish spot each side of vertex 

 bordering eye ; clothed with sericeous silvery pubescence and inter- 

 mixed with dusky simple pubescence. Rostrum, length .94 mm., 

 just attaining middle of venter, piceous, yellowish on joints. 



Antennae: Segment i, length .49 mm., thickness .114mm., black; 

 ii, 1.74 mm., cylindrical, thickness .114 mm., narrowed at base, 

 black, rather closely dusky pubescent and beset with more promi- 

 nent black pubescent hairs ; iii, .64 mm., tapering from thicker at 

 base to more slender at apex, brownish black ; iv, .66 mm., blackish. 



Pronotum: Length .91mm., width at base 1.6 mm. ; black, 

 scarcely shining, surface minutely granulate; clothed with seri- 

 ceous silvery pubescence ; anterior angles with a glabrous opaque 

 spot, present in other species but more conspicuous in this form ; 

 lower pleural margin narrowly pale just before coxal cleft. 

 Scutellum transversely rugulose, silvery to dusky pubescent. 

 Sternum dull black, median line yellowish, pleura black; ostiolar 

 peritreme yellowish, anterior lobe becoming fuscous. 



Hemelytra : Embolar margins distinctly arcuate ; black, opaque, 

 clothed with silvery to dusky, sericeous pubescence; cuneus uni- 

 formly black, dark pubescent. Membrane uniformly brownish 

 black, narrowly paler bordering apex of cuneus, veins yellowish to 

 dusky. 



Legs : Black, coxae, basal half of femora, and two basal seg- 

 ments of tarsi, yellow to fulvous ; a nearly obsolete, narrow 

 yellowish annulus just beneath knee. 



Female: Length 4.8 mm., width 2.4 mm.; more robust and 

 embolar margins more strongly arcuate than in the male, but very 

 similar in coloration. Rostrum, length 1.06 mm., just attaining 

 middle of sternum. 



Breeds on Aster umhellatus. 



Holotype: Male, 3 July, 1920, McLean Bogs, Tompkins County, N. Y. 

 (H. H. Knight); author's collection. Allotype: same data as the type. 

 Paratypes: Males (16) and females (10), taken with the types on Aster 

 umhellatus. Maine— Male and females (2), 19 July, males (4) and females 

 (7), 22 July, female, 25 July, females (2), 26 July, 1909, Machias (C. W. 

 Johnson). New York— Male, 20 July, 1917, males (2) and females (2), 

 3 Aug., male, 25, Aug., 1920, The Plains (C. J. Drake). Vermont— Female, 

 II July, 1908, Mt. Ascutney (C. W. Johnson). Ontario — Males and 

 females (18), 10 July, female, 15 July, males (2) and females (2), 27 July, 

 Parry Sound (H. S. Parish). 

 P. venaticus (Uhler). 



Uhler, Hayden's Surv. Terr., Rept. for 1871, 414, 1872. 



Male: Length 5.9 mm., width 2.3 mm.; hemelytra elongate, tip 

 of abdomen attaining middle of cuneus, embolar margins very 



