March, 1898 ] DYAR : LlFE-HlSTORIES OF N. Y. SLUG CATERPILLARS. 5 
skin. Lateral large areas (4) and (6), indicated by pigment under the 
granules, the smaller ones not represented. Tubercles obsolete, setm 
minute. The body is elongate, rather narrow, highest through joints 
7-8. Color, whitish green, becoming whiter during the stage as the pig¬ 
ment is slowly deposited. A dorsal green line interrupted by the dorsal 
impressed spots, subdorsal lines straight, yellowish white, connected on 
joint 3 and on the tail, edged above with dark green. A row of white 
dashes on the lateral ridge, the large depressed spaces (4) becoming 
whitish with dark centers like (1). Length, 7-11.5 mm. 
Cocoon and pupa as usual. 
Food-plants. —Wild cherry, white birch, black birch, oak, bayberry, 
sour gum, hickory and Clethra alnifolia have been observed. 
Packardia elegans Packard. 
1864— Cyrtosia elegans Packard, Proc. Ent. Soc. Phil. Ill, 342. 
1864— Cyrtosia fusca Packard, Proc. Ent. Soc. Phil. Ill, 343. 
1881— Fackardia nigripunctata Goodell, Can. Ent. XIII, 30. 
1891— Fackardia elegans Dyar, Trans. Am. Ent. Soc. XVIII, 157. 
1894— Fackardia elegans Neumoegen & Dyar, Journ. N. Y. Ent. Soc. II, 76. 
Larva. 
1864— Packard, Proc. Ent. Soc. Phil. Ill, 343 (cocoon; no larva). 
1881— Goodell, Can. Ent. XIII, 31 (brief desc.). 
1890— Packard, 5, Kept. U. S. Ent. Comm. 149 (quotes Goodell). 
1891— Dyar, Can. Ent. XXIH, 277. 
1893— Packard, Proc. Am. Phil. Soc. XXXI, 100. 
1894— Dyar, Ann. N. Y. Acad. Sci. VIII, 222. 
Special Structural Characters. 
Elongate elliptical, rounded before, joint 13 produced into a pointed 
tail. Dorsal space rather narrow, diminishing a little at the ends, 
slightly arched, highest at joints 6-7; lateral space broad, concave; 
subventral space broad, narrowly retracted in the middle. Ridges 
moderate, the lateral the most distinct, subtubercular, setiferous; smooth 
in the last stage. Skin rather coarsely clear granular, always without 
secondary spines. Depressed spaces feebly developed, (r) and (4) 
show faintly as pale rings, seen by transparency as if at the bottom of 
pits with convergent sides. Pigment unusually scanty ; a band of green 
color extends along the upper half of lateral area below the subdorsal 
ridge, elsewhere the body is transparent, faintly colored greenish by the 
blood. Dorsal vessel plainly seen and the contents of alimentary canal, 
showing through the dorsal space. At the end of the last stage the 
