Life-History of a Cochlidian Moth 15 



level. Subdorsal horns of joints 3-5, 8, 11, 12 spherical, large, 

 densely spined, those of joints 6, 7, 9, and 10 minute, with one tubercle 

 and one spine only, and each approximated to the adjoining large 

 horn; subdorsal horn of joint 13 small, with two or three spines. 

 Lateral horns alike with three or four spines, except those of joints 

 3 and 4, which are larger and more rounded. Skin rather densely 

 granular, smooth, without markings. The spines are large, with 

 large tubercular bases and black tips. The detachable tip is nearly 

 as long as the shaft of the spine and is not enlarged near the junction. 

 These spines are presumably of the urticating type, as they have 

 that structure, though they are probably too small to pierce the 

 human skin, at least in this early stage. There is a row of fine 

 hairs on the anterior edge of the hood (joint 2). Length, 0.9- 

 1 .6 mm. 



Slage III. — Head elongate, higher than wide, whitish, the eyes 

 in a round black spot, the mandible brown-tipped. Elongate ellip- 

 tical, flattened, rounded squarish, narrowed behind more than in 

 front, the dorsum flat. Subdorsal horns large, rounded, well spined, 

 those of joints 6, 7, 9, and 10 represented by four or five spines on 

 the skin, approximated to the neighboring horns. Lateral horns 

 moderate, rounded, all elevated. Skin granular shagreened, the 

 granules sharply conical over the dorsal region and separated by 

 their own diameters or more, on the sides more flattened and irreg- 

 ular till along the subventral edge they form a pattern resembling 

 alligator skin. All whitish green, no marks. The depressed spaces 

 (i) are faintly indicated, paired. The cores of the large subdorsal 

 horns are slightly whitish. The spines on the horns have the detach- 

 able tips relatively shorter than before, being not over one-third 

 of the whole spine for the subdorsal horns. The lateral ones are 

 less advanced, and have the structure of the subdorsals of the pre- 

 vious stage. Length, i . 6-1 . 8 mm. This is apparently the inter- 

 polated stage. 



Stage IV. — Elongate, flattened, tapered behind, the ends trun- 

 cate; the larva generally sits a little curved. Subdorsal horns 

 rounded, large, subequal on joints 3, 4, 5, 8, 11, and 12, the pair 

 on joint 13 small, not as yet produced. The short horns of joints 

 6, 7, 9, and 10 rounded, well spined, not so strongly appro .ximated 



