﻿JOURNAL 



OF THK 



]0p1d ]9opk 6lntomologirHl ^oriptg. 



Vol. III. DECEMBER, 1895. No. 4. 



THE LIFE-HISTORIES OF THE NEW YORK 

 SLUG CATERPILLARS— I. 



PLATE VI, FIGS. I-I9. 



By Harrison G. Dyar, A. M., Ph. D. and Miss Emily L. Morton. 



Introductory. 



The authors of the series of articles, of which this is the first, have 

 long been interested in the species of Eucleidce found in this country, 

 especially in their larval state. We have concluded to present jointly a 

 full account of the life-history of each species, as rapidly as we are able 

 to work them out. The accounts of the habits are by Miss Morton, 

 and the labor of obtaining fertile eggs has been performed by her. Dr. 

 Dyar has prepared the technical descriptions. 



The following is a preliminary synopsis of the different species 

 known to occur in New York State, listed in ascending order. We are 

 unable to make it final at present, for the reason that several of the 

 forms are still imperfectly known, and there may be one or two more 

 species than we now recognize. It will, however, serve to outline the 

 scope of our work, but we shall not be able to present the descriptions 

 consecutively. It is, perhaps, unnecessary to state that we would feel 

 duly grateful to receive larvre or cocoons of any of the less known spe- 

 cies (marked with an asterisk below) or of any species not on this list. 



Section i. Spined larva;. — LarvDS with spinose processes ; the spiracle on joint 5 



higher up than those on joints 6 to 12 and the tubercle above it missing. 

 Type I. Three distinct tubercles on the last two thoracic segments. Subdorsal row 

 on joints 4 to 13 converted into detachable, hairy, fleshy appendages. 



Phobetron pithecium. 

 Type 2. Only two tubercles on the thoracic segments. Spines arising from fleshy 

 horns more or less developed. Dorsal and lateral areas both broad. 



Without patches of long, detachable skin spines between the terminal horns 



