144 BULLETIN 85, UNITED STATES NATIONAL MUSEUM. 



PSYLLA PYRICOLA Fdrster. 



Figs. 8, 13, 14. 



Psylla pyricola Forster '48:77. — Scott '76:1.37; '83:205. — Loew '82:247; 

 '84:148; '86:156; '88:15.— Sajo '95 : 28.— Edwards '96:240.— 

 SuLc'05:2; '10:34.— Kuwayama '08:163 (Japan).— Riley '84:69; 

 '91 : 127 (abstract of Loew '86 : 15G).— Riley and Howard '93:226.— 

 Slingerland '92 : 159-186; '96 : 69-86.— Lintner '93 : 317.— Mally 

 '94:153 (mention).— Marlatt '95a: 175-185; '95b : (Circular 7).— 

 Smith '96:137; '09 : 109 (mention).— Patch '11a: 11; '12b:221. 



Psylla apiophila Forster '48:78.— Loew '77:137; '82:232. 



Psylla notata Flor '61 : 365.— Loew '82 : 244. 



Psylla pyrisuga Barnard, Proc. Amer. Ass. Adv. Sci., vol. 28, 1879, p. 478. 



Psylla pyri CvRTis, Gard. Chron. 1842 : 156.— Harris, Inj. Insects, 1852:201; (for 

 several more brief articles see Slingerland '92 : 186.) 



Psylla simulans Slingerland '92 : 186. 



(?) Psylla argyrostigma Forster '48 :97. 



Summer form. — Length of body (male) 1.5mm; (female), 1.9; length 

 of forewing 1.7 to 1.9; length to tip of folded wings 2.1 to 2.8; width 

 of head 0.78. General color light orange to reddish brown, with 

 darker markings; vertex, genal cones, scutum between stripes, male 

 genitalia, legs except hind femora, antennae except at tip, light brown 

 to orange; genal cones lighter colored at apex than at base. 



Head very strongly deflexed; vertex about half as long as broad, 

 with two fovese, conspicuously emarginate in front at median line 

 with front ocellus in emargination ; genal cones about two-thirds as 

 long as vertex, not strongly divergent, subacute at tips, pubescent. 

 Antennee about one and a half tunes as long as width of head, slender. 



Thorax strongly arched. Legs slender; hind tibiae with basal spur 

 very small, or wantmg. Wings transparent, clear or often with a 

 slight yellowish tinge, especially in the distal cells; with a conspicu- 

 ous black spot at tip of clavus; pterostigma long and relatively broad; 

 venation typical. 



Genitalia. — Male. — Anal valve a little longer than forceps, sides 

 subparallel, pubescent; forceps simple, rather acute at tips, tapering 

 uniformly from base to tip, about as long as in coryli Patch. Female. — 

 Genital segment short, scarcely longer than two preceding segments, 

 dorsal valve a little longer than ventral, both acute. 



Winter form. — Differs from summer form chiefly in being larger 

 and darker in color. Length to tip of folded wings 3.3 to 4 mm.; 

 other measurements proportionate; nearly one-tliird longer. General 

 color very dark reddish brown to black ; markings black ; areas noted 

 in summer form as lighter are correspondingly a little lighter here, 

 but antennae mostly dark from base to tip; wings darker on basal 

 portion, apically clear, veins black and very conspicuous, black claval 

 spot more pronounced. 



