Dec. 1898.] Dyar: Life-Histories of N. Y. Slug Caterpillars. 245 



Stage IV. — Elliptical, tail rounded quadrate, in general as T. pal- 

 lida ; ridges, especially the sab-dorsal, slightly segmentarily waved. 

 Depressed spaces deep, well marked with perpendicular sides. Skin on 

 the latticed ridges shortly, finely, densely white pubescent with minute 

 colorless fur arising in a crown from each small granule. On the 

 ridges the fur is usually dark, but it may be pale and concolorous with 

 the rest. Granules nearly uniform on all the latticed ridges, which 

 are at least four granules wide. Depressed spaces (1) to (8) present, 

 (7) and (8) partly confluent obliquely. Color light yellowish-green, 

 sparsely pigmented in patches dorsally and in the upper half of lateral 

 space, the ridges clearer. A narrow wavy yellow sub-dorsal line on 

 joints 4 to 13, often appearing double at a certain angle by the refrac- 

 tion of the distinct clear ridge, the pair connected by a narrow crim- 

 son bridge on joint 8, varying in different examples. A faint yellow 

 or salmon colored transverse band on the anterior edge of joint 3, 

 shaded dusky by the dark rosette spines. Sides paler green, depressed 

 spaces darker, without colored centers. Head green, width about .5 

 mm. Length, 2.6-4.0 mm. 



Stage V. —Elliptical, tail rounded, slightly notched at the sides ; 

 dorsal space about half as broad as the lateral one, flat ; lateral space 

 steep above, slightly concave ; subventral small, retracted ; the larva is 

 therefore flattened. Subdorsal ridge indicated by the angular change 

 in direction between back and sides ; lateral ridge prominent. De- 

 pressed spaces fairly large, distinct. Latticed ridges rounded, the 

 sides not always perpendicular. The skin looks smooth, minutely 

 granular, even shining a little ; but under a high power the 4 to 6 ro- 

 sette spines are still seen on the granules, very short and pale. The 

 granules are small, rounded, not quite contiguous, uniform' all over, 

 the narrowest latticed ridge four granules wide. The rosette spines 

 are dusky on the anterior edge of joint 3. Color bright yellow green, 

 rather translucent on the edges. The yellow subdorsal lines extend 

 from joint 3 posteriorly to joint 13 anteriorly, narrowed at the addor- 

 sal depressed spaces, slender, not reaching the extremities. A yellow 

 band on joint 3 anteriorly, shaded with crimson below. Depressed 

 space (4) yellow in the base with a green center. Subdorsal lines free 

 at the ends, a yellow bridge centrally, varying in different examples. 

 It may become broad, covering joints 7-9, containing a round red 

 spot on joints 7-S, scarcely even widening the subdorsal line. Length, 

 3.8-5.7 mm. 



