Pomona College Journal of Entomology 495 



DD. Body very large, brown. Dorsum quite strongly arched. 



Wings very large, attenuate at base ; first marginal cell relatively short. 



Aphalara picta Zett. 



Aphalara calthae I.inne (1760) 

 (Figure 157, M, N; 158, E, H, L; 159, F, G, S; 160, I, M) 



(Syn. Aph. polygon! Forst.) 

 (Psylla quadrilineata Fitch, and (?) Aph. exilis W. & M.) 



Lengtli of body 1.8 mm.; Icngtii of forewing 2.6 mm.; greatest width 1.0 mm.; 

 width of vertex between eyes Al mm.; with eyes .76 mm.; length .34 mm. General 

 color brown, light to dark; vertex usually light; mesonotum with four stripes 

 of light brown, ligliter than ground color, two on each side of median line; stripes 

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

 what variegated. 



Head slightly deflexed, verj' coarsely punctate ; 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. Genae distinctly 

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

 stalked. Labrum very prominent, elongate, truncate at apex, yellow. 



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

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

 short, quadrate, depressed; forecoxas mostly concealed. Dorsulum short; with 

 four light colored stripes on dorsal surface. Wings rather small, fumose, darker 

 in apical half than in basal ; sides subparallel, about two and a half times as long 

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

 wanting; cubital petiole shorter than discoidal subcosta and shorter than first 

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

 furcal ; apex of wing between radius and fourth furcal. 



Male — Abdomen strongly convergent caudad. Genital segment moderately 

 large ; genital plate about as large as two preceding 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. 



Female — Genital segment short, scarcely longer than anal ventral sclerite; dor- 

 sal plate longer than ventral and more acute ; ventral plate very obtuse at apex. 



Redescribed 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 United States. 



This species was first described by Linne in 1760 from specimens on Caltha 

 palustris. Forster later described a species on Poly gonum as Aphalara polygoni, 

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

 name Aph. polygoni, therefore, is synonymical. In 1851 Fitch described a new 

 species in America, naming it Psylla quadrilineata. As far as his very brief de- 

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



