Dec. iSy7.] Dyar : New York Slug Caterpillars. 169 



Stage II. (Plate IX, fig. 2.) — Blunt, squarish, highest at joints 5-6. 

 Pale green, a whitish line along subdorsal ridge, a little wavy. Sub- 

 dorsal tubercles on joints 3-13 and middle ones on joints 3 and 4 con- 

 ical, clear, with two black set^e each ; lateral row on joints 3-1 2 with 

 one seta, all with small, short, colorless, secondary setje with blunt tips. 

 Skin with sparse watery granules (Plate IX, fig. 6). Largest depressed 

 spaces indicated. The primary setse are conic and sharp tipped, the 

 secondary ones bulbous. The dorsal space appears as a dark green 

 band from the food showing by transparency. Length 1.5 to 2,5 mm. 



Stage III. — Thickly conic, clear granular, otherwise as before. 

 The dorsal depressed spaces show faintly as whitish dots. Subdorsal 

 line more distinct, nearly straight ; lateral tubercles setose. Head about 

 .4 mm. wide, whitish, eye black, mouth brown. Length 2.4-3.5 '^'^• 

 Duration 4 days. 



Stage IV. — Elliptical with square tail. Dorsal space flat : lateral 

 concave, subventral, short. Subdorsal ridge slight, lateral one well 

 marked. No subdorsal tubercles, set» arising from the ridge, two dark 

 stiff ones on each segment with no secondary setae. On the lateral 

 ridge, low raised tubercles with some secondary setae. Skin densely 

 clear granular, the granules slightly conic. Color green, a yellow line 

 along the subdorsal ridge on joints 3-13, not joining each other at 

 either end. A distinct dorsal row (with dark centers) and a fainter 

 lateral row of whitish intersegmental dots. Head .5 mm. wide, pale, 

 eye black. Later the ad-dorsal depressed spaces are indicated, and a 

 darker green shade appears above and below the subdorsal line. Length 

 3.5-4.6 mm. 



Stage V. — Ridges even, not tubercular ; skin densely clear granular, 

 the granules large, conic, especially large along the lateral ridge, but no 

 longer setiform. Setee of both ridges black, arising from the ridge. 

 Dorsal (i), addorsal (2), small ones below the ridge (3), large lateral 

 (4), upper segmental (5) and lower inter- segmental (6) white dots, the 

 two largest (i) and (4), dark centered, all these areas smoother than 

 the skin between, lacking the granules in a small space, not much 

 deepened, the edges graded and obscure. Body elliptical, tail quadrate, 

 notched on the sides. Dorsal, and upper half of lateral space pig- 

 mented, green ; below this transparent leaf green ; a broad yellow sub- 

 dorsal line on joints 3-13, dark edged above and below. The larva 

 looks much smoother than before. Length 4.5-6.5 mm. 



Stage VI. — Head about 1.3 mm., green, eye black. Body smooth, 

 no setae perceptible with a lens except the two pale ones of subventral row 



