]6 KANSAS UNIVERSITY SCIENCE BULLETIN, 



wings pellucid, venation not distinct but darker than the re- 

 mainder of the wing. Stigma dark, sometimes extending to 

 the proximal part of the wing, but generally more normal, as 

 shown in the illustration, being 0.09 mm. broad, and 0.36 mm. 

 long. Legs pale yellow, slightly hirsute, and normal in length ; 

 tarsi (two-jointed in young and old) normal, except being 

 mounted with two capitate hairs near the claws, as shown in 

 the illustration. Other hairs, but not capitate, are present, as 

 shown in the figure. 



Abdomen greenish yellow. Honey-tubes obsolete. Abdomen 

 nearly always drawn out pointed at the distal end. Total 

 length of the body, 1.09 mm. For an illustration of the apte- 

 rous stem-mother, see plate XXII, figure 101. 



This form was taken May 25, on hickory (Carya amara) . 

 The forms are gregarious and live in reddish galls on the main 

 trunk of the tree. Following is Mr. Burrows's description of 

 the gall :" 



"Phylloxera carya^caulis (?) Fitch. This species forms large 

 stem galls on the hickory {Carya amara) . The gall is bullet- 

 shaped, with a tough leathery covering ; green when young, 

 turning to a red in the sunlight, resembling a large strawberry. 

 These galls are about 25 mm. in diameter, with a large hollow 

 cavity enclosed by a wall 2 mm. in thickness, which is covered 

 with yellow lice. The galls appear about April 15, and winged 

 lice appear about May 26, and even in June I have seen small 

 green galls from which aphids emerged. I am inclined to be- 

 lieve that there are two broods of gall-making stem-mothers of 

 this species during the year. The galls appear on the twigs 

 and young shoots of the tree, and are deformed buds as far as 

 I have observed. On the upper surface of the gall I have found 

 several growing bunches of leaves wiiich were normal leaves 

 of the deformed bud. A slight evidence of deformed leaves 

 may be found in the thick, succulent walls of the young galls." 



Subfamily PEMPHIGIN^. 



Antennje short, with five or six joints. Third joint the lon- 

 gest, and about equal, when six-jointed, to the three following 

 taken together. The third and following joints are nearly 

 always annulated with transverse sensoria, but when not annu- 



9. From M. T. Burrows's UDpublishcd manuscript on galls. 



