iMarch 1897.] DyAR : LiFE-HlSTORIES OF N. Y. SlUG CATERPILLARS. 13 



dorsum flat, sides nearly perpendicular, composed of both lateral and 

 subventral spaces. During the stage the color changes. Dark brown, 

 the subdorsal horns pale yellow, only the long ones visible. Subventral 

 space very narrow, the bulging subventral edge colorless. Length i.i 

 to 1.8 mm. 



Stage III. — Upper side dark velvety brownish red as far as the 

 upper edge of the lateral horns ; subdorsal horns on joints 3, 4, 5, 8, 1 1 

 and 12 large, thick, light yellow, the short horns not showing; lateral 

 horns all small and with the subventral space light yellow. Skin ob- 

 scurely finely granular. Dorsal pale dots paired, very faint. The 

 short subdorsal horns have one spine only. Length 1.8 to 3 mm. 



S'age IV. — (Plate II, Fig. 2.) As before. Color velvety red- 

 brown, the long horns and subventral region pale yellow ; a white line 

 along subventral edge. Later the long horns become orange at the tips 

 and a straight white line appears along the middle of the sides between 

 the subdorsal and lateral horns, broken segmentally. Body high, sides 

 nearly perpendicular, horns erect. The short subdorsals have two or 

 three spines and are situated as before adjacent to the long ones. 

 Length 3 to 4 5 mm. 



Stage V. — The six pairs of long horns prominent, thick, alike and 

 well spined ; bright red ; the four short ones small, rounded, incon- 

 spicuous, yet reddish. A faint pinkish dorsal line and traces of one 

 along the subdorsal ridge, ill defined on the dark purple ground which 

 reaches to the lateral horns. Lateral horns faintly pinkish. Subventral 

 region colorless, white on the lower edge. Later in the stage all the 

 horns are fine red and three pale lines can be seen, an addorsal pair be- 

 sides the dorsal, these new lines faint and broken by the large horns. 

 Also three pale lines in the lateral space, one above and one below the 

 original lateral line. Length 4.5 to 7 mm. 



Stage VI. — Horns short at first and pale, but they quickly grow. 

 Color all purple brown, the horns red. Dorsum with three bluish 

 white lines, the outer ones waved and indistinct, lateral space with 

 three yellowish white lines, only the middle one distinct ; subventral 

 space with two white lines ; obscure red lines along the two rows of 

 horns. Skin finely clear granular. Later the broad lateral pale line 

 and subventral edge maybe tinged with red. Length 7 to 10.5 mm. 



Stage VII. — The purplish black ground is now so much narrowed 

 that it appears rather as dark lines on a pale ground. Dorsal space 

 contracted at joints 3, 4, 5, 8, 11 and 12, traversed by three bluish 

 white and four purple lines, somewhat broken. Subdorsal ridge whitish 



