1877. 235 



The full-grown larva is two inches and one-eighth in length, the body thickest 

 at the 9th and 10th segments, tapering from thence a little gradually to the head, 

 a-id a little more to the anal extremity ; the head rises a little on the crown, where 

 tlie lobes are slightly defined, and is flattish in front ; there is a prominent ridge 

 having a triangular hump on the back of tlie ninth segment, and a slight elevation 

 occurs near the end of the 12th, bearing the hinder pair of tubercles more sharply 

 prominent than the rest ; the back is rounded, the belly flattened, at the junction of 

 the two surfaces just above the legs is a fringe of fleshy filaments, more or less 

 branched, though a few simple ones occur amongst them ; the anterior pairs of 

 tubercular warts on the back are small and unobtrusive, while the hinder pairs, and 

 the single row along each side, are rather large and bluntly pyramidal, every one 

 having a fine bristle ; the anterior and ventral legs extend laterally, at right angles 

 to the body, the anal pair also at an obtuse angle backwards, the third ventral pair 

 long, and the fourth pair longest. The ground colour is a light gi-eenish-grey, with 

 a distinct, large, pale patch of faint ochreous-greenish on the sides and back of the 

 5th, another on the 9th, and on the 10th less and less pale, strongly contrasted 

 towards the division by a sooty transverse ii-regular band extending down either side 

 from the blackish hump on the 9th to the back of the leg, from whence it spreads 

 behind, at first broadly, then slants off to a point on the lower side of the 10th, the 

 end of the 12th segment is a little darkened : the head is light greenish-grey, reticu- 

 lated with darker grey, a transverse streak of black reticulation over the crown 

 extends to the mouth, defining the boundary of the face, behind this a shorter black 

 streak marks the back of the cheeks, the face itself is whitish, with a dark greyish 

 streak on either side downwards to the mouth ; the thoracic segments ai-e very 

 much covered with freckles of lightish grey, dark grey and black, some of them so 

 disposed as to faintly indicate dorsal and sub-dorsal double lines, on the 5th the 

 back, though pale in front, is clouded behind, while on the 6th, 7th, 8th, and all 

 beyond the 9th, it is rather uniformly covered with fine greenish-grey freckles, 

 forming on each somewhat of a truncated diamond shape, each successively growing 

 paler, from the 6th to the end of the 8th, these diamonds are relieved by tlie hinder 

 pairs of whitish prominent warts, more or less ringed at their base with dark grey 

 or black, from these proceed backward to the segmental division short, dark greyish 

 double lines rather convergent, most strongly defined on the 5th, 11th, 12th, and 

 13th ; along the sides, from the end of each segment, is a broad-based, somewhat 

 wedge shape, of the paler ground, flanked below by the lateral whitish wai-t, from 

 whence a pale sinuous streak ascends a little obliquely forwards, finely and sharply 

 edged below with black like the wart itself, the dull red oval spiracle, outlined with 

 black, comes close beneath in front of the wart ; the rest of the side is freckled to 

 about the same appearance as the back ; the fleshy filaments are pearly-white ; the 

 anterior legs pale and ringed with dark greenish-grey ; the two first ventral pairs 

 are whitish-grey ; the third and fourth pairs greyish in front, darker greenish-grey 

 behind, bearing a few black freckles, the; anal pair similar : the belly is whitish, with 

 a conspicuous blackish mark on the middle of each segment, viz. : a transverse bar 

 between each pair of the anterior legs, a largish round spot on the 5tli and 6th 

 segments, a very much larger spot on the 7th, 8th, 9th, and 10th, on these two last 

 they are elongated transvei'sely to a diamond shape, the spot is round on the 11th, 

 12th, and 13th, each smaller in the order mentioned ; the skin of the liead, back, and 

 sides, a little rough, the belly smoother, the filaments smooth. 



