126 Journal New York Entomological Society. [Voi. iv. 



the lateral row (4) and lower intersegmental lateral (6) quite distinct, 

 the former reniform. 



Skin at first smooth, in the later stages covered with minute clear, 

 conical granules, rather sparsely distributed. These little granules are 

 intermediate in development between the sharp-pointed skin spines of 

 Sibine and the low, rounded, smooth, colorless granules of Apoda. 

 They are not present on any of the horns, which are armed only with 

 the spines and setre. Caltrope patches appear toward the tip of the 

 horns of the lateral row at about stage VII. They are present on joints 

 6 to I 2 and also on the subdorsal horn of joint 13. In the last stage a 

 single pair of detachable spine patches appears, situated above the sub- 

 dorsal horn of joint 13, the patch small, slender, obliquely truncate. 



The coloration is on the whole mimetic and adapted to escape ob- 

 servation. These larvae persistently hide by day in their native habitat, 

 creeping into curled leaves or any other similar protected place on their 

 food plant. 



The larva is closely comparable with Sibine (Journ. N. Y. Ent. 

 Soc, IV, 2), on the whole slightly less specialized, as seen by the 

 smaller and imperfectly developed detachable spines and the less un- 

 equally developed horns. Its skin structure is, however, considerably 

 higher than that of Sibine. 



Description of the Several Stages in Detail. 



Eg^s. — Laid singly, or in patches of two to seven, slightly 

 overlapping. Flattened, the upper surface low arched, elliptical, but 

 not of a constant shape ; 1.6 x .9 x .2 mm., or about these dimensions, 

 varying in thickness as well as in outline. Nearly transparent as seen 

 on the leaf, milky whitish on glass, and pale lemon yellow on white 

 paper, shining ; reticulations obscure, narrow, linear, angularly 4 to 

 6-sided areas, only seen in a strong direct light. The eggs hatch in 

 seven days from the time they are laid. 



Stage I. — The embryo forms as usual curved ventrally, flattened 

 laterally, the head and tail touching. Before hatching it shortens and 

 thickens slightly, but still well compressed, and emerges through a hole 

 at the top of the egg. Head pale with a large black eye ; width about 

 .2 mm, retracted beneath joint 2, which may be partly retracted below 

 joint 3. Body rather square, the horns all present as described for the 

 mature larva, but the short ones relatively longer (Plate V, Fig. i). The 

 arrangement is as in Sibine and is shown on the plate. The subdorsal 

 horn on joint 8 is only partially reduced in size. There is a tendency 



