^IQ COLLEGE OP AGBICULTURB 



border. Veins dark, as is the fringe at the terminus of each 

 vein. 



Body ash, mottled with black and white. Under part of wings 

 and thorax ash white, thorax covered with long, silken hairs on. 

 under side. 



Length 16.5 mm.; wing expanse 38 mm. 



The difference in appearance of the sexes is very slight, the 

 foregoing description being that of a female. According to 

 Packard considerable geographical variation seems to occur, but 

 in looking over a number of New Hampshire specimens very 

 little, if any, variation was evident. 



Habits of the Adults. As already mentioned but little is known 

 of the habits of the adult moth. From observations in the 

 laboratory the moths are entirely nocturnal id their habits, re- 

 maining quiet in the daytime when they may be easily captured. 

 The eggs are probably deposited on the leaves, egg deposition 

 extending over a considerable length of time, for the species, 

 if not for the individual, as larvae of all sizes were found July 

 20, although on that date by far the larger number were ready 

 to pupate. There seems, also, to be a tendency to a second 

 brood, as one moth emerged the first of August and others ap- 

 peared later. From this it seems reasonable to expect the 

 adults any time during the spring and summer. Several moths, 

 which I think were of this species, were taken at Tamworth, 

 July 20-25, resting on the bark of beech and maple trees, 

 a number were also taken by means of a trap lantern at night. 

 However, they were in too battered) a condition to make identi- 

 fication certain. The last moth to emerge in the laboratory 

 was October 15, but beyond a doubt this was unusual, although 

 the temperature conditions were about normal. 



Description of Larval Stages. The exact period of incubation 

 for this species Is not known. However, emerging from the 

 egg Is one of our most peculiar larvae. According to Packard, 

 "The larva is the most remarkable of its family, in possessing 

 at this stage, an extraordinary armature of nine pairs of enorm- 

 ous horns like those of a deer. The prothoracic pair are nearly 

 three times as large as those on the first abdominal segment, 

 and arise from a dark piceous plate, each horn is stout, about 

 twice as long as the body is thick, with two stout acute tines 

 reaching forward and outward, and a third upward, with a fourth 

 small sharp one projecting in front near the base; each tine 

 bears a hair arising from near the end. The tines are, more 

 or less, rough and finely splnulose, especially on the opposing 



