928 FAMILY XXIX. — MIRID.-E. 



b. Joint 2 of antennae dark fuscous to black, sometimes slightly paler 

 at middle, but always more black than pale. Group B, p. 929. 



bb. Joint 2 of antennae chiefly pale, blackish only at base. 



Group C, p. 938. 



Group A. — Plagiognathus. 

 This group comprises only two of our known eastern species. 



KEY TO EASTERN SPECIES OF GROUP A, PLAGIOGNATHUS. 



a. First antennal with two black lines, second with one; scutellum pale 

 greenish-yellow; beak reaching middle of hind coxae. 



1036. NIGROLINEATUS. 



ho. First and second antennals without black lines; scutellum fuscous; 

 beak reaching hind margins of middle coxae. 1037. ilicis. 



1036 ( — ). Plagiognathus nigrolineatus Knight, 1923, 443. 



Pale greenish- or straw-yellow, rather thickly clothed with fine sub- 

 erect yellowish hairs; membrane pale translucent, usually with a streak 

 on apical half and a spot in smaller cell, fuscous; front and middle 

 femora usually with a short black line on upper face; apical half of 

 hind femora with a black line on inner face and a black dot near middle 

 of outer one; tibiae dull yellow, with a small black spot just below knees 

 on upper face. Joints 1 and 2 of antennae with black lines as in key, about 

 four-fifths as long as width of vertex, 2 nearly five times as long as 1, 3 

 one-half the length of 2, 4 two-fifths as long as 3. Length, 4.1 — 4.3 mm. 



Dunedin, Fla., March 28 — April 17. Beaten from foliage of 

 live oak, Quants virginiana Mill., swept from low herbage along 

 the bay front, and taken at porch light. Recorded only from 

 Connecticut and Minnesota. Knight gives its host plant as 

 Quercus macrocarpa Michx., and its range is probably coextensive 

 with that tree. Easily known by the uniform pale color and 

 black lines of antennse and legs. 



1037 ( — ). Plagiognathus ilicis Knight, 1925a, 305. 



Head and pronotum greenish-yellow, the latter with front and side 

 margins more greenish and basal half of disk tinged with fuscous ; 

 mesoscutum dull yellow; elytra pale yellowish-translucent, clothed with 

 yellowish-brown pubescence; apical halves of clavus, embolium and 

 corium pale fuscous; membrane uniformly pale fuscous-brown; legs 

 straw- yellow, femora marked with small vague fuscous dots; tibiae pale, 

 spines yellowish-brown without spots at base; under surface greenish- 

 yellow. Joints 1 and 2 of antennae greenish-yellow, apical half of 2 

 dusky; 1 but slightly more than half as long as width of vertex, 2 four 

 and three-fourth times the length of 1 ; 3 and 4 brownish to fuscous, 3 

 three-fifths as long as 2, 4 three-fifths the length of 3. Female more ro- 

 bust than male, upper surface rather uniformly yellowish; scutellum and 

 a cloud on apical half of corium fuscous-brown. Length, 3.4 — 3.7 mm. 



