Pomona Coi.leok JornNAi. ok Entumoloov 493 



DI). Hody very largi-, brown. Dorsiim quite stroiifjly nrclifd. 



Wings very largo, ntlcniiatf nt hnsc; first nmrginnl cell relntively sliort. 



.■l[)lialara picia Zett. 



Aphalara calthae I-iiinc (1760^ 

 (Figure i:.:. M, N; 158, E, H, I.; 159. F, G, S; 160, I, M) 



(Syn. Aph. poly^oni Forst.) 

 (Psylla quadrilineata Fitcli, anil (?) Aph. esilis W. & M.) 



Length of body 1.8 nun.; leiigtli of forewing 'i.() mm. ; greatest width 1.0 mm.; 

 width of vertex between eyes .17 nun.; with eyes .7() mm.; h-ngtli ..St unn. General 

 eohir brown, light to dark; vertex usually light; mesonotuni with four stripes 

 of light brown, lighter than ground color, two <ui each side of median line; stripes 

 usually prominent, sometimes inconspicuous or indistinct; alMlomen darker, some- 

 what variegated. 



Head slightly deflexed. very coarsely punct.ate; profile relatively short, about 

 nine-tenths as long as broad; with eyes not quite as broad as thorax. Occipital 

 margin arcuate, centrally elevated slightly; discal area with a marked foveal im- 

 pression on each side of median suture; emarginate anteriorly at median suture 

 and over each antennal insertion. Facial cones entirely wanting. Genu- distinctly 

 swollen. Anterior ocellus under jirojecting vertex, not visible from above, scarcely 

 stalked. I.abrum very prominent, elongate, truncate nt njiex. yellow. 



Thorax broad, somewhat arched, coarsely punctate. Pnmotum long, almost as 

 long as dorsuluni ; with two foveal impressions on each side; propleurites very 

 short, quadrate, depressed; forecoxa- niostly concealed. Dorsuliun short; with 

 four light colored stripes on dorsal surface. JCingx rather small, fumosc, darker 

 in apical half than in basal; sides sub|)arallel, about two and a half times as long 

 as broad, broadest across first marginal cell, broadly rounded apically; pterostignin 

 wanting; cubital ]>etiolc shorter than discoidal suln-ostn and shorter than first 

 cubital; marginal cells subequal ; daval suture terminating very near to tip of first 

 fureal; apex of wing between radius and fourth furcal. 



Malf — .\bdonien strongly convergent caudad. Genital segment moderately 

 large; genital plate about as large as two |)receding ventral sclerites ; claspers 

 rather short, laterally arched, narrowly spatulate at apex; anal valve large basally, 

 with a long, slender posterior lobe, extending beyond tip of genital plate; axial 

 epiphysis not large. 



Frmalr — Genital segment short, scarcely longer than anal ventral sclcritc; dor- 

 sal plate longer than ventral ,ind more acute; ventral plate very obtu.sc at apex. 



Redeseribed from one female in the C. F. Baker collection determined by Dr. 

 Franz Low, collected at Stockholm, Sweden, by Frauenfeldt, and from numerous 

 males and females collected in various parts of the L'niled .Stites. 



This species was first described by Linne in 1 ~()0 from specimens on Caliha 

 paluslris. Forster lali-r described a species on Polysjouum as Aphalara polifgoni, 

 which Low declared after careful comparison to be identical to Aph. callhar. The 

 name .4 ph. poli/goni, therefore, is synonymical. In 1851 Fitch described a new 

 species in America, naming it Psylla iiuadrilineala. .\s far as his very brief de- 

 scription goes it compares very closely to the European Aph. calthae. According 



