HICKORY APHIDS. 323 



99. Phylloxera depressa (Shimer). 



Forming depressed galls on leaves of Gary a alba, the galls opening below with a 

 constricted mouth fringed with filaments. Daktylosphcera coniferum iShimer is, in all 

 probability, Riley claims, the same. (7th Rep. Ins. Mo., p. 118.) 



100. Phylloxera conica (Shimer). 



Forming galls similar to those of P. depressa, bnt without the fringe. (Probably 

 the same, Riley claims.) 



101. Phylloxera caryce-gummoaa Riley. 



Forming pedunculated ovoid or globular galls ou the under side of Carya alba ; the 

 gall white, pubescent, and gummy or sticky, opening below in a fibrous point. 



The eggs are almost spherical, pale, and translucent. Larva, mother-louse, and 

 pupa quite pale, the red eyes and eyelets strongly contrasting. (Riley, 7th Rep. Ins. 

 Mo., p. 118.) 



102. Phylloxera caryce-ren Riley. 



Forming numerous more or less confluent mostly reniform galls on the petiole and 

 leaf-stems of Carya glabra; the galls varying from 0.2 to 0.7 inch in diameter, pale 

 green and densely pubescent, and opening in a slit the whole of their length, trans- 

 versely with the axis of the petiole. (Riley. ) 



103. Phylloxera caryce-fallax Riley. * 



Forming conical galls thickly crowded on the upper surface of tbe leaves of the 

 Carya alba. Strongly resembling P. carym-folice, but the height one-third greater 

 than the basal diameter, and opening below, instead of above, in a circular fuzzy 

 mouth. (Riley.) 



104. Lachnus caryce (Harr.) 



Stylo nullo, corniculis breviaaimis, corpore cinereo, dorso nigro-maculato ; femoribus 

 brunneis, iibiis, tarsis antennisque nigris. 



Larva. — Body with a cinereous pruina, which is somewhat evanescent on the thorax, 

 80 as to exhibit the black color, more or less, on this part. Dorsum of the abdomen 

 with four longitudinal rows of transverse black spots (or four on each segment). 

 Style obsolete ; cornicula very short, tuberculiforra, rostrum extending only to the 

 middle of the third segment ; wings fuliginous, bases ferrnginous brown, dilated, 

 costa and nervures black ; legs black, hairy, the posterior tibiae remarkably so ; 

 femora, except at tips, ferruginous brown. Length of body .25, of upper wings, .35, 

 of body and wings when at rest .43, expansion of wings .72 of an inch. 



Larvae, pupae, and winged insects found on the limbs of the Carya poroina, July 1, 

 1831. (Harris' Corr.) 



105. The hickory gay-louse. 



Monella caryella (Fitch). 



Scattered upon the under side of the leaves, a small pale-yellow plant-louse with 

 white antennae alternated with black rings and pellucid wings laid flat upon its back, 

 its abdomen egg-shaped, somewhat flattened, and with only miuute rudimentary 

 honoy-tubes. (Fitch.) 



106. The dotted-winged gay-louse. 



Callipterus f punctatellus Fitch. 



A ]>lant-lou3e like the preceding, but with black feet and a black dot on the base 

 and another on the apex of each of the veins of its fore-wings. The stigma is salt- 

 white, with a brown streak at each end ; the second vein is wavy, and at its tip is 



