Dec. 1896.] Dyar : LiFE-HiSTORiES OF N. Y. Slug Caterpillars. 183 



with a central pale line and pale tip ; sette pale, simple as before, but 

 supplemented by many very fine short curved hairs, also simple. The 

 primitive setce may be distinguished, arranged as in the mature larva, i 

 on the basal portion, ii on the apex of the subdorsal horns. Length 5 

 to 7 mm. 



Stage VI. — Long horns longer, short ones shorter in proportion 

 than before, the second, third and fifth pairs (joints 5, 6 and 8) curved 

 backward, sickle-shaped the seventh pair (joint 10) forward. Nine pairs 

 visible from above, first and eighth short, fourth and sixth very short. 

 Each has a distinct constricted basal piece, the terminal setge of both 

 portions arising from a round tubercle. Horns covered with large stiff, 

 smooth, pale setae and also with fine, short, broadly branched hairs 

 which become very dense at the apices of the long horns, giving the ap- 

 pearance of rusty brown tips. On the short horns these fine setse are 

 few or absent. A few dark hairs on the dorsum as before. Lateral 

 horns and the lower ones of thorax short, conic, with many pale spines 

 and a pale bare tip. Color brown, the horns darker with a white stripe 

 up the middle. Subventral area broadly white. As the larva grows 

 the bases of the subdorsal horns swell up on the lower side. Length 

 6.5 to 8.5 mm. 



Stage VII. — Shape and proportions of the appendages much as in 

 the mature larva, but slenderer and the posterior ones less closely applied 

 to each other. The first, second, third and fifth pairs curve backward, 

 the seventh and eighth forward, the tenth pair is just visible from above. 

 Clothing of the horns more modified than before. The fine brown 

 branching secondary hairs are thick, especially along the anterior edges 

 of the long horns ; the coarse pale hairs are still present about as be- 

 fore on the basal pieces and short horns, but on the long horns outwardly 

 reduced in number and partly converted into long pale seta^ irregularly 

 spinulated toward the tip on one side. Lateral tubercles with a bare 

 tip, from which arises the primitive seta, surrounded by a circle of stiff 

 hairs. Color brown, the horns darker, a pale gray line up the middle 

 of each, furcate on the basal pieces ; subventral edge white. The long 

 white hairs are on the posterior edge of the horns, away from the greatest 

 number of fine brown hairs. Length 8 to 10 mm. 



Stage VIII. — All pale whitish brown with scarcely any marks. 

 Hair clothing almost exactly as before, except for the addition of a i^\i 

 black, club-shaped spinulated hairs (Plate VIII, fig. 12) on the long 

 horns. Seta ii of subdorsal row on the long horns arises from a bare 

 cone surrounded by a brush of little black spines. Lateral row well 



