Dec, 1896.] Dyar : Life-Histories ok N. Y. Sluc; 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 — Liinacodes pallida Herrich-Schaeffer, Ausser. Schmelt. fig. 183. 



1854 — Limacodes fiavula Herrich-Schaeffer, Ausser. Sclimett. fig. 185. 



1864 — Tortricidia pallida and fiavula Packard, Proc. Ent. Soc. PhiL III, 347. 



1891 — Tortricidia Jlavula Dyar, Psyche, VI, 128. 



1892 — Tortricidia pallida zxAJiavula KiRBY, Cat. Lep. Hat. I, 551. 



1892 — ha textula Morton, Ent. News, III, 1. 



1892 — Tortricidia Jlavula Dyar, Ent. News, III, 62. 



1894 — Tortricidia Jlavula Neumoegen and Dyar, Jour. N. V. Ent. Soc. II, 75. 



Larya. 

 1 89 1 — Dyar, Psyche, VI, 145. 

 1892 — Morton, Ent. News, III, I. (as Isa textula^. 



1893 Packard, Proc. Am. Phil. Soc. XXXI, 104 (as young larva oi Heterogenea sp.). 



1893 — Packard, Proc. Am. Phil. Soc. XXXI, 105 (as Heterogenea testacea'). 

 1893 — Packard, Proc. Am. Phil. Soc. XXXI, 106 (as Heterogenes flexnosa"). 

 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 setse. 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 cooperation in these articles. The assistance 

 which she has kindly continued to furnish me will be specially acknowledged in each 

 case. 



