SUBFAMILY VII. — DER,£OCORINiE. 903 



dd. Hind femora uniformly dark brown or blackish. 



e. Pronotum, elytra and legs uniformly dark brown, the paler sub- 

 translucent areas of elytra stained with brownish ; apical half 

 of hind tibia? usually with a distinct pale ring; host plant, scrub 

 pine. 1004. nigritulus. 



ee. Pronotum fuscous to blackish; elytra fuscous to blackish, the paler 

 areas not stained with brown; hind tibiae with a vague pale ring 

 or none; gula, sides of tylus and front coxa? pale; host plants 

 red and gray pines. 1005. albigulus. 



1000 ( — ). Der^eocoris appalachianus Knight, 1921, 160. 



Dark fusco-brownish; head paler brown with brownish-black mark- 

 ings; pronotum with calli and front margin of disk brownish-black; 

 clavus and base of corium yellowish, subtranslucent, embolium paler; 

 cuneus dark brown, paler at middle; membrane fusco-brownish, paler 

 each side near tip of cuneus; legs reddish- or fuscous-brown, tips of coxa? 

 and basal half of femora paler; tibia? dark brown, their apical halves 

 dull yellow; ventrals dark brown to piceous, shining. Antenna? dark 

 brown, blackish apically, joint 1 almost as long as width of vertex, 2 

 three times as long as 1, the apical half visibly thickened, 3 two-fifths the 

 length of 2, one-fourth longer than 4. Beak reaching middle of hind 

 coxa?. Length, 6.2 mm. 



Known only from Tryon, N. Car., where it was taken May 21 

 at light. 



1001 ( — ). Der^ocoris laricicola Knight, 1921, 164. 



Dull greenish-yellow, thickly marked with fuscous punctures ; vertex 

 with four curved stripes and tylus with two lines, blackish; calli shining 

 black, a small spot on each apical angle and another between them, yel- 

 low; apical half of corium with a large irregular brown blotch; embolium 

 and cuneus dull translucent yellow dotted with fuscous, their tips darker; 

 membrane dusky hyaline, the cells and sides paler, veins brown; tibia? 

 and apical halves of femora dark brown, the former with two pale or 

 reddish rings; basal halves of femora, coxa?, prosternum and osteolar 

 duct pale yellow; meso- and metasterna opaque black; ventrals shining 

 black, paler at middle. Antenna? dark brown ; joint 1 slightly longer than 

 width of vertex; 2 subcylindrical, tapering at base, three times longer 

 than 1 ; 3 and 4 united two-thirds the length of 2. Pronotum with sides 

 strongly converging, base, especially in female, distinctly flaring, two and 

 a fourth times as wide as apex, disk coarsely, very irregularly punctate, 

 with pale calloused areas between the punctures. Elytra more finely and 

 more evenly punctate. Length, 6.2 — 6.5 mm. 



Ithaca, N. Y., June 27 (Davis and Gerhard). Recorded only 

 from Massachusetts. New York and Minnesota, but probably 

 occurs on tamarack throughout most of the range of that tree. 



1002 (— ). Der^ocoris pinicola Knight, 1921, 162. 



Pale brownish-yellow, thickly flecked with blackish punctui-es ; head 

 with the two curved median dark stripes broken to form oblique, trans- 



