444 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull 



middle of apical half, black ; tibiae pale, spines dusky but not dark 

 at base. Venter pale greenish. 



Female: Length 4.3 mm., width 1.66 mm. ; similar to the male 

 in coloration. 



Food plant : Quercus macrocarpa. 



Holotype: Male, 11 June, 1919, St. Paul, Minn. (H. H. Knight); 

 Minn. Univ. Coll. Allotype: taken with type. Paratypes : Males and 

 females (12), taken with types. Connecticut — Female, 22 June, 1920, 

 Orange (B. H. Walden). Minnesota— Males and females (28), 10 June, 

 1920, University Farm; males and females (6), 11 June, 1920, Anoka County 

 (H. H. Knight), collected on Quercus macrocarpa. Males (5), females 

 (9), 14 June, 1922, Lakeland (H. H. Knight). 



P. chrysanthemi Wolff. 



Miris chrysanthemi Wolff, Icones Cim., iv, 157, t, xv, f, 151, 1804. 

 Plagiognathus viridulus Reuter, Hem. Gymn. Eur., i, 74, 1878. 



Male: Length 4.3 mm., width 1.5 mm. ; pale greenish testaceous, 

 disk of pronotum more nearly green, clothed with prominent black 

 pubescence; base of antennal segments i and ii, and a subapical 

 ring on segment i, black; femora with two rather distinct rows 

 of black spots on anterior face ; membrane pale fuscous, a darker 

 spot just beyond apex of smaller areole. 



Female: Length 3.8 mm., width 1.6 mm. ; shorter and more 

 robust than the male but very similar in coloration. 



Food plant : Chrysanthemum leucanthemum Linnaeus. 



Canada, Maine, New Hampshire, New York, Vermont. 

 P. blatchleyi Reuter. 



Ofv. Finska Vet.-Soc. Forh., liv, Afd. A. No. 7, 61, 1912. 



Male: Length 4.6 mm., width 1.7 mm. ; pale greenish testaceous, 

 clothed with pale yellowish pubescence, hairs becoming dusky on 

 cuneus and apical half of corium and embolium; antennae black, 

 segments iii and iv pale fuscous, extreme apex of segments i and 

 ii pale; tylus black, basal and apical segments of rostrum blackish; 

 legs nearly as in chrysanthemi but black spots on femora less con- 

 spicuous ; membrane fuscous, central area of apical half, veins 

 and invading membrane each side, paler. 



Female: Length 4.4 mm., width 1.7 mm.; very similar to the 

 male in coloration although the membrane, and sometimes antennae, 

 slightly paler. 



New York. 

 P. blatchleyi var. nubilus Knight, new variety. 



Apparently only a color form of blatchleyi but distinctive in 

 general aspect. 



Male: Length 4.5 mm., width 1.8 mm.; yellowish green, head 

 except tylus, and anterior half of pronotum, brighter green ; basal 

 half of pronotum, disk of clavus, and apical half of corium fuscous 

 to blackish; sternum, pleura more or less, and venter, fuscous to 

 blackish ; legs greenish yellow and suffused with fuscous, spots as 

 in typical form but with dark line forming above, also a shorter 



