THE ENTOMOLOGIST. 139 



specimens. Head smooth and shining, gray, very thickly 

 marked and dotted with intense black ; there is a black 

 shining plate-like mark on the 2nd, and another on the anal 

 segment; that on the 2nd is divided by the medio-dorsal 

 and subdorsal lines. The medio-dorsal stripe is yellowish 

 white; the subdorsal lines narrower, white; two parallel 

 waved lines of the same colour as the medio-dorsal stripe 

 form the spiracular lines; these waved lines form a sort of 

 chain-like Isand of oblong spaces, and in the centre of each 

 space, just below the upper line, the black spiracles are 

 situated ; the trapezoidal dots also black. Ventral surface 

 and claspers uniformly dull yellowish green ; the legs black. 

 Rests on a leaf, with the head bent considerably round to one 

 side. My larvae fed on whitethorn ; and were full grown and 

 went down May 28th. — Geo. T. Porriil ; Hudderi^Jield, June 

 8, 1872. 



Description of the Larva of Acidalia imitaria. — This 

 larva astonishes me by its extraordinary length and slimness : 

 it rests with its four claspers attached almost close together, 

 and its body elevated at an angle of 45 degrees, and swaying 

 backwards and forwards with every breath of air, or with the 

 motion of the room, or the trembling of the hand ; I do not 

 allude to the undulating movement from side to side, which 

 is a normal habit of Geometers when not perfectly at ease. 

 The head is semiprone, and scarcely as wide as the 2nd 

 segment. The body is uniformly slender, with a raised 

 lateral skinfold interrupted at the divisions of the segments; 

 there are also two almost imperceptible ridges, one on each 

 side, equidistant between the lateral skinfold and a median 

 line of the back ; the body is also transversely wrinkled or 

 divided into sections, from sixteen to twenty on each 

 segment; the number, doubtless, uniform in the species, but 

 not in the individual ; after the 9lh segment these sections 

 are manifestly fewer and wider than on the anterior and 

 median segments; there are many short stiff scattered bristles 

 about the head and body, more particularly about the 

 posterior extremity of the latter. The colour of the larva is 

 pale putty-colour, almost while, with a medio-dorsal smoke- 

 coloured stripe, which grows gradually paler as it approaches 

 the head ; lighter and darker stripes are discernible on the 

 sides of the body, the lowest on each side is the darkest and 



