168 



THE ENTOMOLOGIST. 



it being a bright warm day with a sun temperature of 73°, 

 but they all remained motionless. On the 3rd of January, with 

 a shade temperature of 48°, I observed one larva feeding slowly ; 

 from that date others occasionally fed. On January 17th those 

 from ova deposited on September 12th began crawling about in 

 search of fresh food. The plants having only a few living leaves, 

 I removed forty of the larvae on to a fresh plant with a good 

 supply of young leaves ; they all crawled up the stems and 

 rested on the petals, mostly on the under side, but they did not 

 commence feeding until the 20th, when I noticed several feeding, 

 and again on the following day, when it turned warmer, the out- 

 door shade temperature at 11 a.m. being 52°, and indoors 60°, 

 where the larvae were kept. It apparently is the usual habit of 

 the larvae of hyale to leave their hybernaculum about the middle 

 of January in their more southern home, as those I had in 1892* 

 did the same. February 12th was a cold, almost cloudless day 

 after a very cold early morning of 22°, but a slight haze prevented 

 much warmth from the sun, as the temperature in the sun did 

 not rise above 54° where the larvae were, but for the want of 

 more heat they remained nearly motionless all day. 



In the continuous dull weather during February and March 

 the larvae were kept near a fire during the daytime, but from the 

 dullness of the weather they showed little signs of activity, and 

 fed but slightly ; but from 5 to 11 p.m. nightly they were placed 

 on a chimney-piece over a fire and directly under a gaslight, 

 which appeared to suit them admirably, as they became active 

 and fed on and off all the time, yet they made but slow progress, 

 although a few moulted for the third time, and they all gradually 

 died, the last one dying on March 16th, having lived for about 

 two hundred days. I was so far enabled to figure and describe 

 the larva after the third moult — description presently. 



I will now allude to another brood of hyale larvae, which 

 Messrs. Cope and Hawkins had under observation, from ova 

 obtained the middle of August last. They all commenced 

 hybernating during September, and at the end of that month 

 the plants containing the larvae were placed in a greenhouse, 

 which was kept at a moderately warm temperature throughout 

 the winter, the night temperature not going down below 44°. 

 These were left untouched until the third week of February, 

 when my friends found forty still living, the majority of them 

 having moulted the third time. They made satisfactory progress 

 until many had reached their last stage, when they gradually 

 died off, and only one succeeded in pupating on March 6th, 

 which, however, was slightly malformed, and produced a crippled 

 yellow female on April 4th. 



On March 18th Mr. W. A. Cope kindly gave me, for the purpose 

 of figuring, the last remaining larva, almost full grown, which I 

 figured the following day, when it measured just an inch in 



