PLANT-LICE OF THE OAK. 211 



agrees with the above species. There were many winged specimens 

 which already had deposited numbers of larvse. (Unpublished notes.) 



298. Callipterus quercifolii Thomas. 



Winged specimen. — Antennse nearly as long as the body, seven jointed; first joint 

 quite large and very prominent, nearly twice the length and twice the diameter of 

 the second joint, which is rather small, and of the usual suborbicular form ; the 

 third joint longest, but it exceeds the fourth very little, fifth very little shorter than 

 the fourth ; sixth not more than one-third the length of the fifth ; seventh a little 

 shorter than the sixth. 



The wings as usual ; third discoidal vein of the front pair twice-forked ; the hind 

 pair with two discoidal or branch veins ; all the veins and branches are bordered 

 with dark brown, giving them the appearance, when seen through a pocket magni- 

 fier, of broad black veins; the bordering does not expand at the tops of the veins, 

 but retains its uniform width throughout. Stigma opaque, brown, with a posterior 

 bordering of brown, fusiform in shape, being very acutely pointed at the apex, with 

 no internal angle at the point where the fourth vein arises. 



Costal vein very distinct, and rather prominent, it and the subcostal vein are 

 remarkably parallel, the distance apart scarcely varying in the smallest degree from 

 the base to the stigma. Distance between the insertion of the first and second, and 

 second and third veins about equal; the second fork about equally distant from the 

 apex and first fork. Fourth vein nearly straight at its base, curving regularly but 

 not sharply towards its apex, runs very nearly with the first fork of the third vein. 



The front of the mesothorax distinctly broader than the prothorax, the offset form- 

 ing a distinct shoulder, the abdomen terminating suddenly and bluntly ; no tail ap- 

 parent. Honey-tubes very short and thick, slightly enlarged at the base, the length 

 greater than but not twice the diameter. 



When seen through a pocket lens, these (alcoholic) specimens appear dark brown ; 

 the antennae annulated alternately with dark brown, or fuscous and white; the legs 

 brownish or dusky with the base of the femora and tips of the tibue pale ; the wings 

 transparent with the broad dark brown or fuscous veins previously described. The 

 body dark brown except the tij) of the abdomen, which is pale and shows traces of 

 transverse dark bands. (Thomas.) 



Wingless specimen. — Somewhat regularly ovate, but subtruncate at the posterior 

 extremity, or, at least, rounded very suddenly and bluntly to the tip. Antennse not 

 quite as long as the body, showing the light and dark annulations very distinctly. 

 Eyes of this as well as the winged specimens reddish-brown. The ground color of 

 the body of the alcoholic specimens is a pale, dirty yellow, but the dorsal surface is 

 chiefly occupied by broad transverse brown or fuscous bauds which extend to the 

 somewhat broad, depressed portion of the lateral margins; there is one band on each 

 segment; a pale line runs along the middle of the back from the head to the tail. 

 Legs as in the winged specimens. Scattered over the body are stiff, spine like black 

 hairs; it is also more or less covered with small tubercles. Honey-tubes as in the 

 winged specimens — pale yellow. 



Length of winged specimen to the tip of the abdomen ( which is somewhat shrunken), 

 .06 inch; to the tip of the wings, .15 inch. 



Professor Bundy, of Sauk City, Wis., from whom the specimens were 

 received, makes the following statement in reference to them: 



Abdomen of the female light green below ; black above, with four greenish spots; 

 honey-tubes and tip of the abdomen white; head and thorax black, shining above. 

 Eyes black: antenniB light, banded with black ; wings with widened veins and tinged 

 with purple (reflection). 



On red oak {Quercns ruhra) leaves in June, Sauk City, Wis. On both sides of the 

 leaves, along the veins. Leaves becoming viscid from their secretions. 



