262 DAVENPORT ACADEMY OF SCIENCES. 



along the front of the head are smallest and almost ovoid, while 

 the lateral protuberances grow gradually longer ; all are covered 

 with sharp projections or teeth, while the tip is either rounded or 

 furnished with some short projections. The surface of the body- 

 is densely corrugated. 



Pupa. — Length o. 6""-. Color yellow; eyes brown; antennae 

 and legs dusky ; the tubercles paler and the tip of the wing-pads 

 black. Antennae short, about one-fourth the length of the body, 

 the third joint cylindrical and smooth. The fleshy tubercles or 

 protuberances are very much shorter than those of the stem- 

 mother, especially those of the abdomen which are very small and 

 wart-like ; the surface of the body is densely covered with minute 

 points. 



Winged migrants. — Length of body o.6""'-; expanse of 

 wings about 2"™- Color orange, the prothorax darkest and the 

 abdomen palest towards the end. The prothorax is marked each 

 side with a large, more or less triangular dusky spot, two trans- 

 verse dusky stripes between them, accompanied in front by two 

 small dots and a similar dot each side of the posterior stripe. 

 Head dusky, eyes brown. Antennse, thoracic lobes, sternal plate 

 and legs black. Wings faintly dusky, veins and stigma darker, 

 the subcosta almost blacMy, the veins bordered by a slightly 

 darker shade. Front of head arcuate ; eyes large ; abdomen 

 much elongated and tapering. Antennae rather short, or slightly 

 more than one-third the length of the body ; the lower sensorium 

 of the third joint is circular or broadly oval and the upper one 

 elongated and about one-half the length of the section above the 

 lower sensorium; the whole joint is quite densely and sharply 

 serrate. 



Dr. C. V. Riley, in an article accompanied by figures, pub- 

 lished in the Sixth Report on the Noxious and Beneficial 

 Insects of Missouri, for 1874, pp. 64 and 65, and in his descrip- 

 tion of the species, p. 86, No. 25, as well as in a second article on 

 the same in the Seventh Report for 1875, pp. 118 to 121, 

 applied to it the name of Phylloxera rileyi Licht., of which sped- 

 mens had previously been sent by Dr. Riley to Mr. Lich ten- 

 stein, who decided it to be a new species, to which he gave the 

 name of Ph. rileyi, a name used by him, without a description, in 



