Dec. 1896 .] Dyar: Life-Histories of N. Y. Slug Caterpillars. 171 
pressed spots; broadly bordered with yellow, which color also extended 
along the subdorsal ridges half way to the tail. Length 3.5 to 
4.7 mm. 
Stage VI .—Depressed spaces deep and well marked, finely sha- 
greened granular in the bottom. Latticed ridges coarsely densely clear 
granular as before. Areas in the subventral space reniform, (7) and (8 ) 
conjoined, the granulations of this space finer than above the lateral 
ridge. Body green, at first scarcely marked, but during the stage the 
dorsal red patch appears. This varies greatly in shape in different 
larvae, from a small transverse bar (Plate VI, fig. 3) to a large patch 
covering the dorsum of joints 5 to 9 and extending part way down the 
sides. There is a more or less distinct yellow subdorsal line, broken 
where it crosses the red patch, the patch bordered with crimson and 
yellow. The patch is of a varying shade of purplish red with a more 
or less distinct central square blotch on joints 7 and 8, the enclosed de¬ 
pressed spaces of dorsal row (1) centered with a dark dot. The patch 
may have an irregular outline as in the mature larva, but it does not 
reach either extremity. A small reddish patch may occur on joint 3. 
Length 4.7 to 6.7 mm. 
Stage VII .—Smoothly rounded, elliptical, the tail subquadrate; 
highest through joint 5, evenly rounded (Plate VI, fig. 5). Subdorsal 
ridge rounded, dorsal space rather narrow, lateral broad, gradually 
sloping. Lateral ridge smooth, prominent, exceeding the subventral 
ridge. Subventral space small, hollowed. Depressed spaces large and 
deep, arranged as described above (Plate VI, fig. 8), their bottoms finely 
granular. Latticed ridges coarsely clear granular. Body green with a 
large dorsal marking which varies from narrow (Plate VI, fig. 6) to 
broad* (Plate VI, fig. 7) and from bright red to dull purplish in differ¬ 
ent examples. It has a pale salmon colored center, often square and cov¬ 
ering only one depressed space (joints 7-8) or rarely larger, occasionally 
wanting. The patch is bordered with crimson and yellow and is usually 
darker around the edge and on the latticed ridges. It usually narrows 
on joints 3 to 5, widens again, reaching the lateral depressed space (4) 
on joints 5-6, is incised in a curve and broadens to the lateral margin 
.at joint 8 ; narrows again in an incised curve to the depressed space (4) 
on joints 9-10, and there tapers to the tail, thus forming a large, blurred 
Ted cross. . Most of the depressed spaces on the sides are pale with darker 
green centers. Length of the larva 6.7 to 9.5 mm. 
*It is difficult to illustrate the range in the size of this marking without a long 
series of figures. The patch may be even larger than shown in figure 7. 
