850 FAMILY XXIX. — MIRID,£. 



base and apex of tarsi piceous; ventrals silvery-greenish. Antennae yel- 

 lowish, joint 1 longer than head, stouter than 2, narrowed toward base; 

 2 cylindrical, as long as outer margin of corium. Pronotum one-third 

 wider than long, disk flat, finely rugose, side margins feebly sinuate in 

 front of humeral angles. Elytra minutely scabrous. Length, 5.5 mm. 



Ranges from Ontario and New England west to Colorado and 

 California. Host plant as yet unknown. 



921 (1166). Diaphnidia pellucida Uhler, 1895, 44. 



Pale green fading to yellowish-white, sparsely clothed with very fine 

 suberect whitish hairs; under surface and legs more yellowish, the genital 

 region, tarsal claws and fourth antennal often tinged with fuscous. Joint 

 1 of antenna? longer than head, narrowed at base, 2 four times as long as 

 1, 3 two-thirds the length of 2, 4 one-third as long as 3. Pronotum one- 

 third wider at base than long, calli rather prominent, with an impressed 

 space between them, basal margin straight, hind angles subacute. Clavus 

 and corium minutely scabrous. Length, 4 — 4.3 mm. 



Washington, D. C, July 14 (Gerhard). Ranges from Quebec 

 and New England west to the Pacific ; in the east not recorded 

 south of Maryland. Host plants, apple, hop hornbeam, maple, 

 hazelnut and hickory. Van Duzee (1912a, 489) says that: 

 "It seems to be common throughout the eastern United States 

 and Canada. It occurs most frequently on hickory trees and 

 has a most annoying habit of biting sharply should it land 

 where the skin is wet with perspiration." 



922 (1167). Diaphnidia provancheri (Burque), 1887, 144. 



Pale translucent greenish-yellow, sometimes with calli and basal half 

 of pronotum in part vaguely brownish; tibiae and tarsi usually lightly 

 tinged with fuscous. Antennae as in key, joint 1 dull yellow, slightly 

 longer than width of vertex, 2 four times as long as 1, 3 three-fourths 

 as long as 2, 4 one-third the length of 3. Length, 5 mm. 



St. Anthony Park and Two Harbors, Minn., June 18 — Aug. 

 20 (Minn. Univ. Co//.). Ranges from Quebec and New England 

 west to California; in the east rarely found south of latitude 

 42°. Occurs on hickory, oak, willow, beech and yellow birch. 



923 (1168). Diaphnidia capitata Van Duzee, 1912a, 490. 



Pale greenish-yellow, translucent; head shining black, eyes brown or 

 gray; membrane pale hyaline, feebly iridescent. Joint 1 of antennae 

 blackish-fuscous, as long as width of vertex, 2 brown, paler at middle, 

 three and one-half times the length of 1. Head smaller, vertex relatively 

 wider and more convex than in our other species. Beak reaching hind 

 coxae. Length, 3 — 3.5 mm. 



Ottawa, Ont., July 2 {Win Dusee). Cloquet, Minn.. Aug. 1 



