12 Journal New York Entomological Society. [Voi v. 



and absent in others near by. Though not gregarious many are often 

 found on the same bush. They are low feeders, not occurring on trees 

 to any extent. 



The eggs are laid during July and the larvae mature toward the 

 middle of September. They remain on the under sides of the leaves in 

 spite of their very conspicuous coloration. The effect of a touch of 

 their spines is about tlie same as that of Sibiiie stimulea. The larvae 

 have eight stages, occasionally nine. Two examples bred from eggs of 

 the same moth varied in this respect. They do not feed in stage I, 

 which is rapidly passed through. 



I am indebted to Miss Morton for obtaining for me the eggs from 

 moths bred from larvae part of which I collected and part obtained from 

 Mr. Doll. 



Criticism of Previous Descriptions. 



All of the references given are to figures or descriptions of the ma- 

 ture larva, none of them going into structural details. The two best are 

 that of Professor French (1885) and my own (1894). I notice nothing 

 important of a positive nature to criticize except that in Prof. French's 

 account the segments from which the horns are said to arise are not 

 quite accurately numbered. 



Description of the Several Stages in Detail. 



Egg. — Singly, or in small groups, slightly imbricated. Elliptical, 

 flattened, translucent pale ocher yellow on glass, 1.5 x .9 mm.; reticu- 

 lations obscure, visible only in a strong light, rounded hexagonal, 

 nearly linear, somewhat irregular. No special characters. They hatch 

 in nine days. 



Stage I. — (Plate II, Fig. i.) Not different in structure from Euclea 

 delphinii, the horns proportioned the same, each with three setae with 

 slightly swollen tips. Color rather dark yellow, shining, the long 

 horns whitish. Segments well marked ; skin smooth. Shape as usual, 

 elongate, squarish, the horns low conical, prominent, their bases con- 

 tiguous. Length i.i mm. The larvas do not feed in this stage. 



Siage II. — Subdorsal horns on joints 3, 4, 5, 8, 11 and 12 large, 

 rounded ; the rest small, all furnished with stinging spines ; the short 

 subdorsals (joints 6, 7, 9, 10) bear only one si)ine and are crowded up 

 adjacent to the next large horn. Spines pale, black tipped. Ridges 

 whitish, but dorsal and lateral spaces faintly shaded with dull red; 

 horns pale. Dorsal depressed spaces (i) cleft-like with paired dots. In 

 shape the larva is thickest through joints 4-5, the outline elliptical; 



