46 NOLA CENTONALIS. 



of which they ate well both flowers and leaves, until the 

 15th, when, a frost occurring, they became very torpid. 



Their structure was now very well seen, they having 

 only three pair of ventral prolegs ; the head blackish- 

 brown and shining, a small semilunar plate of the 

 same colour and finely divided on the second segment, 

 and three rows of dark brown tubercles on each side 

 of the body ; the upper or subdorsal row was the 

 largest and most prominent, and all were thickly 

 studded with radiating brown hairs, a few single, much 

 longer, hairs occurring behind and along the sides. 



On October 22rd, as they had not fed for more than 

 a week, I placed them out on a potted plant of Lotus 

 corniculatus, but next morning, the 24th, about 11 

 o'clock, one of two kept back in a bottle for observa- 

 tion moulted for the fifth time, whereupon I withdrew 

 the sprays on which were the other three from the 

 Lotus, and secured them in another bottle to await 

 their moult, which occurred during the night, so that 

 on the following morning, the 25th, I found that only 

 one larva was waiting for this operation, which was 

 not accomplished until 10 a.m. on the 27th. Up to 

 that date none of the larvae had fed at all since 

 moulting, and up to the end of the month they all 

 refused to feed, and had begun to hibernate. 



On November 4th I received a full-grown larva of 

 the same brood from Mr. Tugwell, who by keeping 

 several larvse in a warm room with a fire and gas, 

 confined in a wide-mouthed glass bottle containing 

 mixed food of Trifolium minus, T. jpratense blossoms, 

 and Medicago lujpulina, on all of which they fed (the 

 bottle tied over with calico and over the bottle a large 

 glass globe (? shade), to prevent the food drying too 

 much), had forced them forward to maturity. This 

 larva I figured as soon as it arrived. 



Its length was nine-sixteenths of an inch, or nearly 

 five- eighths when stretched out fully ; it was stout 

 and plump, the segments well divided, and having on 

 each side of the body three rows of prominent warty 



