298 



CLARENCE M. WEED. 



probably because of coloring matter in sap consumed. Dorsum of head usually 

 nearly covered with two large, subquadrangular, dusky patches, which some- 

 times run together. Dorsum of prothorax with three more or less distinct small 

 spots arranged iu a triangle near margins; and one transverse spot on each side 

 of dorsc-mesou near front margin ; rest of dorsum with a longitudinal marginal 

 and submarginal row of indented blackish dots on each side. In the green 

 specimens the dorsum shows two longitudinal rows of large, transverse, quad- 

 rangular, slightly dusky patches. Antennae short, nearly unicolorous with 

 head or else light wood-brown, from base to apical fourth of third joint; from 

 there to tip dusky, first and second joint normal ; third longest, about equal to 

 iv plus v, which are subequal; basal part of joint vi a little longer than v, and 

 same length as its apical portion. The median portion of the tergum of the 

 penultimate abdominal segment produced into a prominent, subconieal, truncate 

 tubercle, projecting caudad ; this is generally dusky at tip. Eyes dark, post- 

 ocular tubercle not very prominent; cornicles dusky, especially at tip; more 

 than half as long as antennae; slightly expanding toward tip, then suddenly 

 contracting and ending with a flange; cauda well developed, dusky at tip; ros- 

 trum short, barely reaching second coxae, dusky at tip. Legs light wood-brown, 

 with tips of tibiae and all of tarsi of first two pairs, and all of tibiae and tarsi of 

 hind pair dusky. 



Described from many specimens on Salix, at Hanover, N. H., 

 Nov. 10, 1892. One had three eggs in abdomen. 



Egg_ — Length 0.8 mm. Suboval, one side (that by which attached) usually 

 being nearly straight, and the other much curved ; yellowish when first ex- 

 truded, but soon changing to shining black. Deposited in crevices between 

 buds and twigs. 



Described from many specimens on Salix, Nov. 10, 1892. 

 Aplii!^ euonymi. 



In the Autumn of 1890 the oviparous forms of Aphis euonymi 

 were common on the leaves and twigs of the burning bush (Euony- 

 vms atropurpurem) in the vicinity of Columbus, Ohio. 



Oviparojis Female. — Length L5 mm. : width across abdomen 0.6 mm. ; antennae, 

 0.7 mm. Body obovate, tapering to a point; a row of indentations near outer 



.^-nf^ 



Fig. 1. — Aphis euonymi: a, oviparous female, magnified; 6, liead and antenna 

 of same, greatly magnified ; c, e^rgs on twig, masnified. 



end of margin. Color deep, dark brown, bronzy iu some lights; antennae dusky, 

 except proximal half of third joint, which is whitish; first two pairs of legs 

 with coxae, unicolorous with body, femora and tibiae whitish or yellowish, with 



