Mar, 1899.] DyaR : LiFE-HlSTORIES OF N. Y. SlUG CATERPILLARS. 65 



and 13 are a little larger than the others, those of joints 4 and 5 bright 

 red, that of 3 as well as the laterals of 3 and 4, pale red ; all the rest 

 green. An obscure yellow line along the subdorsal ridge on joints 3 

 to 1 2 connects the horns in a series of lunate dashes ; a dorsal row of 

 segmental pale dots, largest on joint 11. Segmental incisures well 

 marked in paler lines. Body green from the blood, brighter anteriorly. 

 The addorsal depressed dots and the large lateral ones (4) are whitish. 

 Horns short, rounded, not much tapering, well spined. Skin very 

 finely densely clear granular, the granules much like those in the bot- 

 tom of the depressed spaces of H. flexuosa.^ Length, 3.7 to 6.0 mm. 

 Stage VI. Dorsal space moderately broad, even, flat or a little 

 concave, only turning down at the ends ; sides folded in above the 

 lateral horns, concave, nearly perpendicular above ; subventral space 

 much contracted, the lateral horns touching the leaf. Subdorsal horns 

 small, conical, projecting at an angle of 45° except those of joint 13, 

 which project obliquely backward ; 3 to 5 and 13 are a little the larg- 

 est. Lateral horns distinctly longer than the subdorsals, bearing sev- 

 eral swollen-tipped setiferous spines among the others. Cleiar leaf 

 green, horns of joints 3 and 4 and the subdorsals of 5 and 13 red, 13 

 the palest ; a narrow yellow subdorsal line ; a geminate dor.sal yellow 

 line composed of a double series of lunate marks, which enclose the 

 addorsal dots in the concavities and touch the paired dorsal dots with 

 theirapices (Plate I, fig. 5). This marking is faint on joints 3 and 13. 

 On the sides, the reniform (4) and round (6) spots are whitish in a 

 single large depressed area, cutting off the front of the segment as a 

 dark green bar. The paired dorsal dot on joint 9 is now scarcely 

 defined from the regular dorsal marking. Skin uniformly granular 

 shagreened, the sides of the low granules radially corrugated to the 

 base. Horns granular ; spines of the red horns blacker than the 

 others. No caltropes. Length, 6 to 9.3 mm. 



Stage VII. Elongate, dorsum flat, sides not narrowed till the ends, 

 the lateral horns almost touching the leaf. Bright green, the narrow, 

 pale yellow subdorsal lines of joints 4 to 13, joined by a straight line 



*The skin structure is practically the same in stages II to IV, showing under the 

 microscope shining lines in small, dense, irregularly hexagonal reticulations, not re- 

 vealing a very definite structure (Plate I, fig. 8). It is the same as in S. textula, 

 but the reticulations are more regular, distinctly round, not elongate. In S. textula 

 they are elongate, somewhat sinuate and more confused. After stage IV the larvae 

 diverge, nasoni becoming granular. 



