206 NEMATUS HERBAGES. 



shining, of a green colour, often more or less marked 

 with red. Each gall contains only one larva, and as a 

 rule there is but one gall on a leaf. 



The larva has the head fuscous, somewhat darker in 

 front, the eye-spots deep black, the mouth is also 

 black. The legs are dark greenish- white, with darker 

 claws ; the ventral legs are the same, but if anything 

 whiter. Over each claw is a small black mark ; there 

 is a large (comparatively) irregular mark over each 

 foot (including the ventral ones, except over the anal 

 pair). The body is of a fuscous-white colour through- 

 out ; the contents of the food canal give to the back a 

 darker tint, while the skin is covered with small, black, 

 or fuscous-black dots arranged in rows. In all there 

 are five rows of these dots, arranged as follows one 

 row on the centre of the back, the dots composing it 

 being of a nearly uniform size, as well as being more 

 numerous ; in the second row the dots are fewer, 

 there being about three to each segment of the body ; 

 the following row has two dots to a segment, one large, 

 the other small; the next is composed of one long 

 dot, and the last row is made up of the above-men- 

 tioned marks over the legs. On the second segment 

 the first two dots are of an irregular shape and larger 

 than any of the others, and a little below and in front 

 of them are two smaller dots. The anal segment 

 bears no marks. 



This is the only gall-inhabiting larva which bears 

 regularly -arranged marks on the body. It becomes of 

 a slate colour before pupating. 



I have found very young galls containing eggs in 

 June, but they are most abundant from the middle of 

 July to the middle of August. The lowest elevation 

 at which I have found the galls would be about 2000 

 feet, and from that height they extend to near 3800 

 feet, if not higher. They are rather local in their dis- 

 tribution, showing a partiality for particular spots on 

 a mountain and not spread uniformly over it. Appa- 

 rently also they vary in numbers during particular 



