444 MAINF, AGRICULTURAIv EXPE;RIMENT STATION. 1912. 



equal, 6 -|- 7 are shortest and equal. The joints are quite variable in 

 length, as will be seen from the following measurements : 



Joint 123456789 



40 56 60 28 44 36 36 32 60. Formula (39) 215 (67) 84. 

 40 60 60 32 26 28 28 32 52 " (23) 915 (48) (67) 

 40 52 52 40 40 28 38 32 52 " (239) (14s) 8 (67) 

 44 56 52 24 36 32 56 60 an 8- jointed form, hardly adult. 



Legs short, stout. 



Middle leg: coxa, 80; fem. with troch., 180; tibia, 116; tarsus, 72; 

 claw, 24. 



Hind leg: coxa, 88; fem. with troch., 200; tibia, 148; tarsus, 84; claw 

 24. 



Scattered over the body are several long thin hairs and short thick 

 spines. The gland-pits are not numerous, and are very small. Caudal 

 tubercles, large, round, with two long setse, and several long thin hairs ; 

 the tubercles are well covered with short, stout, spear-shaped spines. 

 Young larva: Antennee 6-jointed, measuring as follows: Joint — (i) 

 24. (2) 32. (3) 40. (4) 24. (5) 24. (6) 68." (King 1901). 



Life history. The life history of this species resembles that 

 of the foregoing. The immature insects of both sexes hiber- 

 nate under the rough bark oi the host plant. In the early sum- 

 mer the eggs are laid, the young soon migrating to the under 

 surface of the leaves. This species has been recorded from the 

 haw and the apple. On April 29, 1912, some twigs of the 

 gooseberry infested with this species were received from Bruns- 

 wick, Maine. The twigs were covered with the puparia of males 

 which are small elongate, and felted, as well as a few females. 

 On May 4 to 6 the winged male adults appeared. On the 8th 

 of" May a few females were transferred from the drying goose- 

 berry twig to the stem of a young currant bush growing indoors. 

 One of the females (Fig. 490) laid eggs on June 11, numerous 

 young soon appearing and settling on the underside of the 

 leaves. Eggs from one of the other females were later also 

 obtained some of which were transferred to young plants of 

 apple, elm and maple, greenhouse grown. The eggs soon 

 hatched, the young settling upon the underside of the leaves 

 and thriving as well as upon the original host. As the experi- 

 ment was discontinued in September nothing can be said of the 

 subsequent development. This insect has been found in a few 

 northern states as well as in Canada. 



Remedies. Same methods as for preceding species. 



