SANBORN : KANSAS APHIDID.E. 63 



mm. ; III, 0.45 mm. ; IV, 0.28 mm. ; V, 0.28 mm. ; VI, 0.10 

 mm. ; VII, 0.50 mm. ; total length, 1.78 mm., being about the 

 length of the tarsum longer than the body, Sensoria circular and 

 unequal in size ; there are fifteen or twenty on the third seg- 

 ment, five to eight in a row on the fourth, five or six on the 

 fifth, and a cluster of about six unequal in size on the distal 

 end of the sixth. Eyes black ; ocular tubercles inconspicuous ; 

 ocelli inconspicuous. Beak dark, 0.45 mm. in length, extend- 

 ing to the abdomen. 



Thorax of a mild black; wings lightly pellucid, veins dark 

 and frail. The subcostal is bounded caudad with a faint licht 

 band. The stigma is dark and 0.09 mm. broad by 0.45 mm. 

 long. Total wing expansion, 4.00 mm. Legs black, a shade 

 lighter at the bases, slightly hirsute, and normal in length. 



Abdomen pale yellow, with about seven black, patches located 

 as shown in the illustration, and four or five lateral black spots. 

 These patches are variable in size and number. Honey-tubes 

 are black, imbricated, and cylindrical, with a slight dilation at 

 the base ; 0.19 mm. in length, or about one and one-half times 

 the length of the tarsi. Style black, except a small basal part ; 

 hirsute, spinous, ensiform, and 0.09 rhm. long, being half the 

 length of the honey-tubes. Total length of the body, 1.28 mm. 



This form was taken November 1, on the cultivated strawberry 

 (Fragaria virginiana) . It is somewhat sporadic, but forms 

 small colonies on the dorsal side of the leaves. The apterous 

 forms have more pronounced frontal tubercles than the winged 

 forms. 



Aphis gossypii Glov. Plate Xf, fig. 64. 



Head black. Antenn^ie dark, latter imbricated, and almost 

 bare ; length of segments : I, 0.07 mm. ; II, 0.05 mm. ; III, 0.27 

 mm. ; IV, 0.18 mm. ; V, 0.16 mm. ; VI, 0.09 mm. ; VII, 0.27 

 mm. ; total length, 1.37 mm., or about the length of the third 

 joint shorter than the body. Sensoria circular and large ; there 

 are from eight to ten on the third joint, none on the fourth, the 

 usual distal one on the fifth, and about six small ones of un- 

 equal size at the distal end of the sixth. Eyes are black ; ocu- 

 lar tubercles prominent ; ocelli normal. The beak is dark, 0.50 

 r"m. long, and extends to the mesacoxse. 



Prothorax dark, lateral tubercles prominent and conspicuous. 



