322 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 



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

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

 The following species have been noticed by Fitch and others ; 



91. The hickory-stem gall-louse. 



Phylloxera caryoscaulis (Fitch). 



Forming bullet-like galls, hollow, green, 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 carycBvence (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 tiuged with a dusky hue. 



93. The hickory leaf-witherer. 



Phylloxera carycefolice (Fitch). 



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

 each having an orifice in its summit; a very small black plant-louse with a pale 

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

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



94. The seed gall hickory phylloxera. 



Phylloxera caryce-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 earyw-septa (Shimer). 



Forming flattejed 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. carycB-globulis. 



98. Phylloxera forcata (Shimer). 

 Forming galls much like those of P. caryce-aemen. 



