74 CAMPTOGRAMMA FLUVIATA. 



numbers the rest, and may fairly be taken for the 

 type ; the description of the figure suits all varieties. 



The length, when full-grown, is about three-quarters 

 of an inch, the figure proportionately stout for an 

 ordinary geometer, tapering towards the head, cylin- 

 drical behind, and slightly flattened forward ; head 

 smaller than the second segment, with its lobes well 

 defined. 



The ground colour is greenish-grey, the head 

 striped with the commencement of the dorsal and 

 subdorsal lines ; the dorsal line dusky and slender, 

 dividing the lobes of the head, and running thence 

 continuously to the commencement of the fifth seg- 

 ment; the subdorsal stripe begins also on the head, 

 and is rather paler than the ground, but edged on 

 either side with a fine dusky line ; on the folds 

 between segments 5 — 10 are five diamond-shaped 

 marks, whitish, but bordered with dusky or blackish 

 outlines, and with the dorsal line appearing in the 

 centre of each as an elongated black spot ; the centre 

 of the back, after the middle of the tenth segment, 

 becomes much paler, with faint blackish As instead of 

 diamonds, and the subdorsal lines grow indistinct; 

 just above the spiracles is a dark line, continuous on 

 segments 2 — 5 and 10 — 13, but showing only as five 

 black dashes at the intermediate folds; the spiracles 

 are small and obscure, but ringed with black, and 

 placed on ground slightly paler than the rest of the 

 body ; the tubercular dots are whitish-grey ; the 

 segmental folds show slightly reddish ; the belly is 

 pinkish-grey, paler down the middle, and with a 

 central and two subspiracular fine dusky lines ; the 

 ventral legs have a dark streak, and the anal legs a 

 light streak down them. 



Some varieties have the markings as above, but the 

 ground colour all over pinkish-grey; others have a 

 grey ground, without any green or pink tinting in it. 



There is a very decided variety of a light yellowish- 

 green colour, without much noticeable marking, 



