New York Agricultural Experiment Station. 321 



Appendages. — Antennae, strong; basal segment less than one-third the length of 

 joint II, which is somewhat longer than joint III; the apical segment is shorter 



than joint III. Legs, strong; femora 

 I, shorter than femora II; femora 

 III, slightly longer; tibia? I and 

 femora I are of about the same 

 length, and only slightly shorter 

 than tibia? II, which are about 

 three-fifths as long as tibiae III. 

 The tarsi are as usual. Hairs, 

 somewhat less prominent than be- 

 fore. 



Color, light green; eyes light 

 colored. Margin of thorax, tips 

 and margins of wings pale yellow. 

 Wing pads often dark brown. 

 Median abdominal spot pale yellow, 

 sometimes indistinct.- 1 



Adult. — The adult is a small, 

 slender, delicate pale-green sucking 

 insect at the time of emergence. 

 The color tints on the wings soon 

 appear and within a short time well- 

 developed individuals become dark- 



Fig. 24a. — L. pratensis, Fifth Stage. 



ish brown. A considerable variation occurs in this respect, however, and adults may 

 be either darkish brown, pale yellow, or some combination of these tints. The 

 adult was described by Uhler 22 as follows: 

 "Form of Lygus contaminatus H. Schf. 

 Pale, obscure yellow; antenna? and trans- 

 verse carina at base of head very 

 slender, the former nearly as long as the 

 hemelytra, the apical joint infuscated; 

 surface of head polished, impunctured, 

 clothed with short hairs; tylus slender, 

 short; eyes brown, large, prominent. 

 Pronotum smooth, very convex, spar- 

 ingly hairy, finely, densely, mostly con- 

 fluently punctured. 



Scutellum moderately convex, brighter 

 yellow, closely and finely wrinkled and 

 punctured, minutely pubescent. Hemely- 

 tra closely covered with yellow prostrate 

 pubescence, finely, closely, punctured; 

 clavus embrowned, a brown cloud across 

 the tip of the corium invading the base 

 of the membrane. The membrane with a 

 brown spot occupying the tip of the 

 areole, behind this is a marginal smaller 

 spot brown, and still farther back a 

 smaller one; inferior surface and legs lighter yellow, the venter pubescent, shining, 



Fig. 25. — Adult. 



21 In the fifth stage, pratensis nymphs are of a dull green color mottled and marked 

 with brown. The characteristic spots and the bands on the legs are distinct. 

 The pro- and meso-thorax are of about equal length. The second antennal 

 joint is the longest. See Fig. 24a. 



vProc. Bost. Soc. Nat. Hist. 19:407. 1878. 



21 



