132 



three each, and the rest only 2; there is a faint sub-dorsal brownish 

 line broken up into patches; the spiracles are brown, with redder brown 

 patches above and below them. When at rest, segments 3, 4, 5 and 6 are 

 very much elevated into a hump. All the tubercles bear short sharp 

 hairs, and there is also a series along the lower lateral region. 

 Length, when at rest, 25 mm.; when feeding, 32 mm. 



Food plant, Ulmus. 



A variety of the caterpillar occurs, which is pale brownish, with a 

 flesh tint, but agreeing in all its markings with the green form. 



Food plant, Viburtittm. 



On changing to pupa, the larva loses the brown patches of the 

 middle and posterior segments, and becomes wholly of a dull orange 

 color. 



ACRONYCTA OCCIDENTALIS. G. & R. (No. 46.) 



Larva. (After third moult.) 



Body wholly velvety black, as are also the head, legs, and entire 

 under surface. Each segment is furnished with 7 small warty tubercles, 

 from which spring bundles of short ochreous spines. The spiracles 

 are white, and below them is a waved irregular line of pale reddish 

 brown. 



Length, i.oo inch. 



Full grown. Head pitchy, with deep sinus in the middle. Along 

 the dorsum is a broad black band, extending on each side, in the 

 middle of the segments, into a transverse line, on 5 to 10 only. This 

 band bears on each of these segments 2 ochreous spots, between which 

 are some whitish patches; the sub-dorsal lines are sordid flesh-color; 

 those of the lateral region enclosing the spiracles are lead-color, the 

 spiracles being black; the 2, 3 and 4 segments are wholly lead-color, 

 only interrupted by the pinkish sub-dorsal stripe; the 12th segment 

 bears a small hump, and the body is covered rather sparingly with long 

 chestnut hairs. 



Length, 1.25 inch. 



Food plant, wild cherry. 



ACRONYCTA LITHOSPILA. Gr. (No. I02.) 



Larva. (Full grown.) 



Very dark bluish green, darkest dorsally; head slightly truncate in 

 front, with 2 slightly raised protuberances on the crown; pitchy with 

 brown marks. The body is covered with rather long hairs; along the 

 dorsum is a dull pink stripe, triangularly formed on the 6 anterior seg- 

 ments, then widening very much until the whole of the dorsum is cov- 

 ered on 7, 8 and 9, then narrowing again to the anal extremity. The 

 middle and broad portion of this mark is darker than the anterior and 



