— 6o'— 



The body of the usual cylindrical shape, rather slender, dark 

 pitchy reddish brown all over. Prothoracic shield transversely 

 oblong, not so square at the corners as in D.perspicua. There are 

 four dull whitish rather obscure lines on each side, which are of 

 nearly the same width and of exactly the same color; they are 

 somewhat irregular on the edges, being somewhat broken and of 

 the same distance apart. The lowest or infraspiracular line is a 

 little wider and more distinct than the others and extends along 

 the lateral ridge. The body beneath is of the same color as above. 

 The suranal plate is black, rounded; the anal legs are black at the 

 tips. The middle abdominal legs are stained black above the 

 plantar, and the thoracic legs are black. The hairs are long and 

 white; those on ist thoracic segment, and 8th and 9th abdominal 

 longer than those elsewhere; those on the prothoracic segment 

 stand up and curl over the head, and two or three of them are as 

 long as the three thoracic segments put together. The spiracles 

 are black. 



Datana contracta ]]'alkcr. 



The larvce were sent me by Mr. James Angus, and were received 

 Sept. I. It feeds on the walnut and will eat the ash or rose. 



Full-grown larva. — Length, 30 mm. Head large, as broad as 

 the body, entirely black, including the mouth-parts, ist thoracic 

 segment with a distinct gamboge-colored transversely oblong 

 l^late, with three indistinct blackish clouds on it. The body is jet- 

 black, with four continuous whitish-yellow very distinct stripes on 

 each side, and a fifth broken one between the bases of the legs, 

 both thoracic and abdominal. The three upper stripes are equi- 

 distant, the upper or subdorsal one being slightly wider than the 

 others. The 4th stripe is on the lateral ridge and is broader than 

 the others and wavy. The width of the dorsal black stripe is 

 like that of D. perspicua. There is a median ventral whitish 

 yellow stripe which ends before reaching the anal legs. The 

 thoracic legs are black, but gamboge-yellow at the enlarged fleshy 

 base. The middle abdominal legs are gamboge-yellow, each with 

 a large external black patch above the planta. The two subdorsal 

 whitish yellow lines end before reaching the suranal plate, leaving 

 a black space; the plate is also black, and the anal legs are wholly 

 black above and beneath and on the sides, 'i'he head and body 

 are clothed with long white hairs, much longer and thicker than 

 in D. perspicua, and longer than the body is thick. 



