March 1897.] DYAR : LlFE-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, n 
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. 
Stage 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 
nearlv 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 
