4 
Dec, 1896.] Dyar: Life-Histories of N. Y. Slug Caterpillars. 167 
THE LIFE-HISTORIES OF THE NEW YORK SLUG 
CATERPILLARS.—III-VI.* 
(Plates VI-IX.) 
By Harrison G. Dyar, A. M., Ph. D. 
Tortricidia pallida Herrich-Schaffer. 
1854— Limacodes pallida Herrich-Schaeffer, Ausser. Schmett. fig. 183. 
1854— Limacodes flavula Herrich-Schaeffer, Ausser. Schmett. fig. 185. 
1864— Tortricidia pallida and Jlavula Packard, Proc. Ent. Soc. Phil. Ill, 347. 
1891— Tortricidia Jlavula Dyar, Psyche, VI, 128. 
1892— Tortricidia pallida and Jlavula Kirby, Cat. Lep. Het. I, 551. 
1892— Isa textula Morton, Ent. News, III, 1. 
1892— Tortricidia Jlavula Dyar, Ent. News, III, 62. 
1894— Tortricidia Jlavula Neumoegen and Dyar, Jour. N. Y. Ent. Soc. II, 75. 
Larva. 
1891— Dyar, Psyche, VI, 145. 
1892— Morton, Ent. News, III, 1. (as Isa textula). 
1893— Packard, Proc. Am. Phil. Soc. XXXI, 104 (as young larva of Heterogenea sp.). 
1893—Packard, Proc. Am. Phil. Soc. XXXI, 105 (as Heterogenea testacea). 
1893— Packard, Hoc. Am. Phil. Soc. XXXI, 106 (as HeterogenesJlexuosa). 
1894— Dyar, Ann. N. Y. Acad. Sci. VIII, 220. 
Special Structural Characters. 
Dorsal space moderately broad, narrowing only a little toward the 
extremities, arched; lateral space broad, oblique, concave; subventral 
space small, retracted. Ridges slightly prominent, never tubercular, 
furnished with single or furcate swollen-tipped setae in stage I, afterward 
smooth or with rudimentary setae. Outline from dorsal.aspect elliptical 
notched at the anterior part of joint 13 to form a short quadrate tail. 
Skin covered with close, appressed, rather large, clear granules which 
appear immediately after the first molt and increase slightly in number 
at subsequent molts. Depressed spaces large, well developed, deep with 
sharp perpendicular sides, the bottom flat and finely granulated. These 
spaces are very conspicuous and so large as to divide the coarsely granu- 
* Miss Morton has given up her cohperation in these articles. The assistance 
which she has kindly continued to furnish me will be specially acknowledged in each 
case. 
