46 KANSAS UNIVERSITY SCIENCE BULLETIN. 



Abdomen brownish yellow, honey-tubes dark, incrassate, and 

 somewhat funnel-shaped at the end ; length, 0.25 mm. Style 

 concolorous with the abdomen, hirsute, knobbed, and 0.07 mm. 

 long. 



This form was taken on the Soft maple {Acer disycarpum) , 

 during the middle of May. They endured weather which froze 

 off the ends of their antenntr. They are both sporadic and gre- 

 garious in habit, and may be found on the terminal buds, but 

 more frequently on the ventral side of the leaves. 



ApMs ribis, n. sp. Plate XVI, fig. 82. 



Head dark. Antenmv dark, much imbricated, and with but 

 few hairs; length of segments: I, 0.05 mm.; II, 0.07 mm. ; 

 III, 0.27 mm.; IV, 0.23 mm.; V, 0.19 mm.; VI, 0.12 mm.; 

 VII, 0.28 mm. ; total length, 1.30 mm , extending to the cen- 

 tral part of the abdomen. Sensoria circular, six in a row on 

 the third joint, four in a row on the fourth, the usual distal one 

 on the lifth, six small and one large one at the distal end of the 

 sixth. Eyes black ; ocular tubercles prominent ; ocelli normal. 

 Beak dusky, 0.41 mm. long, extending midway between the 

 pro- and mesocoxtc. 



Prothorax dark, lateral tubercles broader than long. Thorax 

 dark, wings pellucid ; veins with a very slight smoky border. 

 Stigma black, 0.63 mm. long and 0.13 mm. broad. Total 

 wing expansion, 3.02 mm'. Legs of a nearly uniform brown, 

 tibia lighter except the distal end. 



Abdomen dark green, with four pairs of lateral black spots. 

 Near the caudal end on each side the style is a lateral tubercle 

 about twice as long as broad. Honey-tubes black, with imbri- 

 cations like those on the antennae, cylindrical, and 0.19 mm. 

 long, being twice the tarsi in length and extending to near the 

 base of the style. Style conical ; distal half black, the color 

 extending to the base along the lateral margins. The enclosed 

 part is of a lighter color. Armed with numerous small spines 

 and some setaceous hairs. Length, 0.18 mm., or about equal 

 to the honey-tubes. Total length of the body, 2.37 mm. 



This form was taken May 17, on the cultivated currant 

 {Ribes riibrum, var. suJ>glandulosuni) . It is gregarious in habit 

 and colonizes the ventral side of the leaves, causing them to 

 curl, which forms a pseudogall of protection. 



