322 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 



A large uumber of Hemiptera, such as gall-lice, tree-hoppers, etc., 

 puncture the leaves, causing them to wither or raising galls upon them. 

 The followiug species have been noticed by Fitch and others: 



91. Thk hickory-stem gall-louse. 



Phylloxera carycecauUs (Fitch). 



Porraiug bullet-like galls, hollow, greeu, and of a leathery texture, upon the leaf- 

 stalks and succulent young shoots, with the walls of the cavity inside covered with 

 minute white and yellow lice. 



92. HiCKORY-VEIN GALL-LOUSE. 



Phylloxera carywvence (Fitch). 



Forming plaits in the veins of the leaves, which project up from the surface in an 

 abruptly elevated keel-like ridge upon the upper side of the leaf and with a mouth 

 opening on the under side, the lips of which are woolly and closed. The wingless 

 females minute, pale yellow, broad in front, and tapering behind to an acute point; 

 antennae and legs short and tinged with a dusky hue. 



93. The hickory leaf-witherer. 



Phylloxera car yrefoliw (Fitch). 



Forming small conical elevations on the upper surface of the leaf of Carya alba, 

 each having an orifice iu its summit; a very small black plane-louse with a pale 

 abdomen and legs and smoky wings laid flat on its back, and havingonly three veins 

 in addition to the rib. Length, 0.06 inch. (Fitch.) 



94. The seed-gall hickory phylloxera. 



Phylloxera dttryce-semen (Walsh). 



Forming fuscous, minute, subglobular, seed-like galls on the leaves of Carya glabra, 

 the galls opening in a small nipple on the under side. (Walsh.) 



95. The hickory round-gall. 



Phylloxera caryce-globuli Walsh. 



Forming hemispherical galls about 0.25 inch diameter on the upper surface of the 

 leaves of Carya glabra and alba, the galls rather flat below, where they open in a slit. 

 (Walsh.) 



96. The hickory spiny gall. 



Phylloxera spinosa (Shimer). 



Forming large, irregular galls, covered with spines, on the petiole of the leaf of 

 Carya amara, the galls opening beneath in an irregular, sinuate slit. (Shimer.) 



97. Phylloxera cary(v-septa (Shimer). 



Forming flattened galls with a septum, on the leaves of Carya alba, the galls open- 

 ing both above and below. (Shimer.) Probably, according to Riley, only an abnor- 

 mal form of P. caryce-globulis. 



98. Phylloxera forcata (Shimer). 

 Forming galls much like those of P. caryaisemen. 



