THE ENTOMOLOGIST. 835 



but slightly wider, as already noticed, at the third segment; the 

 twelfth segment is slightly elevated dorsally, and the elevated 

 portion bears two small tubercles or warts placed trans- 

 versely ; the dorsal surface is convex and transversely 

 wrinkled ; its division into segments is perceptible, but not 

 conspicuous; the ventral surface is flat; the dorsal slightly 

 overlaps the ventral surface, its margin being dilated and 

 fringed with a series of slender fleshy appendages, bearing 

 the same relation to the body, both in position and appear- 

 ance, as the rootlets of ivy to the climbing twig from which 

 they emanate. The legs are rather long, incurved or sickle- 

 shaped, and the claws sharp- pointed, admirably adapted for 

 clinging to the lichens growing on the perpendicular surface 

 on which the larva constantly resides; the claspers are ten in 

 number ; the ventral pairs increase in size as they recede from 

 the head, the first pair being the smallest, the second slightly 

 larger, and the third and fourth still larger, longer and 

 stronger ; the anal claspers are slightly spreading, and extend 

 considerably beyond the rounded extremity of the anal flap. 

 The head and body emit a number of scattered hairs, each 

 seated on a minute wart. The colour of the head and body 

 is green-gray, the head being more decidedly gray and the 

 body more decidedly green ; the head has two crescentic 

 black marks on the face, and two black spots on the crown ; 

 the cusps of the crescents are directed towards the crown ; 

 the component parts of the mouth are black, and there is a 

 black transverse line immediately above it; the ocelli on 

 each cheek are black, and surrounded by a slender black 

 ring; the body has numerous black spots and dots irregular 

 in size and shape ; the legs are spotted or annulated with 

 black, and the claws entirely black. The life-history of this 

 interesting insect is entirely unknown to me: the full-grown 

 larva I have described, this 2nd day of June, is the only one 

 1 ever saw ; it was most obligingly presented to me b)^ Mr. 

 Machin, whose knowledge of our British Lepidoptera is 

 almost unsurpassed, and whose contributions to the mass of 

 knowledge collected in the 'Entomologist' are familiar to all 

 its readers. A word remains to be said about the scientific 

 name and the aflinities of this interesting insect : it is the 

 Phalaena sinuata of Villars ; the Geometra flexularia of 

 Hubner; the Pyralis flexulalis of Haworth's *Prodromus;' 



x2 



