Sept. i8 9 3.] Dyar: Life Histories of N. Y. Slug Caterpillars. 153 



//^(Journal N. Y. Ent. Soc, IV, 167-172) contains many sentences 

 referring to T. testacea. Having wrongly identified the larva of tes- 

 tacea and being under a misapprehension as to the close relation of sev- 

 eral of our smooth red-spotted Eucleids and further desirous of includ- 

 ing all the varieties of pallida while I was writing about it, I went too 

 far and included portions taken from larvae of other species. The ac- 

 count, therefore, is based on Tortricidia pallida, T. testacea and T. 

 {Heterogenea*) flexuosa, confused together. It is fully corrected here- 

 with, with illustrations of both species. 



Description of the Several Stages in Detail. 



Egg. Elliptical, flat, whitish translucent on white leaves, shining ; 

 reticulations faint, narrowly linear, elongate. Size 1.0 X -6 mm. 

 Laid singly on the under side of the leaf. 



Stage I. (Plate VIII, fig. 1). Elliptical, rather elongate, dorsal and 

 lateral spaces rather broad. Setae as in T. pallida, the Y-shaped ones 

 large, strongly alternating, those on joints 5, 7, 9 and 11 leaving out. 

 Color translucent whitish with a slight green tint. Skin smooth. 

 Length .7-1.1 mm. The larva feeds during this stage. 



Stage II. Distinct short black setae, two on subdorsal ridge, one 

 on lateral ridge on the abdominal segments. Subdorsal ridge rather 

 square, dorsum flat, rounded ; tail quadrate ; sides concave. Lateral 

 ridge moderate, subventral space small, retracted. Depressed spaces 

 all present as in the mature larva, deep, sharp, the latticed ridges com- 

 posed of one row of large clear granules, becoming subpapillose on the 

 lateral ridge. Color pale greenish without marks. Length, 1.1-1.7 

 mm., or reaching 2.2 mm. in six-stage larvae. 



Stage III. Elliptical, tail rounded quadrate ; all pale green. Skin 

 structures the same as before; setae quite distinct. Length, 1.6-2.2 

 mm. Six-stage larvae, which have omitted stage II, have the size and 

 coloration of the next stage. 



Stage IV. (Plate VIII, figs. 2, 3). Elliptical, both ends rounded, 

 the anterior more obtusely ; dorsum arched. Ridges low, the subdorsal 

 shorter than the lateral. Body smooth, setae nearly obsolete. Skin 

 coarsely clear-granular except in the large depressed spaces which are 

 finely granular and on the lateral ridge where the granules become sub- 

 papillose. Color light yellowish green ; during the stage the subdorsal 



* I find that none of the American species belong to Heterogenea Knoch except 

 shitrtlejjii Pack, which is distinct from casonia Grt. A generic revision will follow. 



