NEMATUS RIBESII. 169 



specimens are caught with the back of the abdomen 

 black. 



The full-fed larva has a shining black head, paler at 

 the mouth, and bears some longish hairs. The body is 

 green, or pallid sea-green, generally darker along the 

 back when the food canal is filled. The first and the 

 second in part and the anal segments from the eleventh 

 are orange. The legs are black above, whitish at the 

 junction of the femora and tibiae and beneath ; claws 

 also black. Claspers pallid green. Over the legs is 

 a large black tubercle; over the claspers a pair of 

 smaller tubercles, bearing two or three hairs. The 

 body is covered with black shining tubercles, each 

 ending in one or more hairs ; on the first thoracic 

 segment there are eight in all above that over the 

 leg; on second and third are six on each side. The 

 tubercle over the pedal one is the largest of all. On 

 the abdominal segments there are twelve on each side, 

 exclusive of the pair over the legs ; those on the top 

 are arranged in two nearly parallel rows of six each, 

 those below are more irregularly placed, one of them 

 being situated between the large tubercles. On the top 

 of the anal segments is a large black mark, narrowed 

 behind and ending in the cerci, which are black; 

 on either side of the mark at the narrow base are six 

 or seven small black marks. When young the Iarva3 

 are green, with black heads, and bear minute black 

 points. At the last moult all the black tubercles are 

 cast off; they then become shining bluish-green, orange 

 behind the head and on the tail ; the head is also paler. 



The eggs are laid along the veins on the underside 

 of the leaves in which they are but very slightly 

 embedded by means of the saws. Pupa green or 

 yellowish-green, orange on thorax and apex of 

 abdomen. 



The larvae feed on the gooseberry and currant 

 bushes; and are frequently excessively numerous, 

 doing great damage by denuding the bushes of leaves. 

 The young larvae eat the surface of the leaf at first, 



