DUFFEV — TRANSFORMATIOXS OF A CARABID, ETC. 535 



the imago, but still within the pupa case.* Aug. 9, eight of the 

 supposed eggs of P. tiviidus were placed in a web oi H. ctinea 

 on a cutting of mulberry, which was set in moist sand in a six- 

 inch pot, and covered with a bottle from which the bottom had 

 been removed, a piece of muslin being tied over the mouth of the 

 bottle. One egg hatched during the day, and four more during 

 the following night. The young larvie, which were evidently 

 the same as those observed in the webs, began feeding on the 

 Hyphantria larvae soon after coming from the egg, Aug. 16, 

 three of these larvte were alive and in fine condition. All moulted 

 during the night of Aug. 15. This was probably the second moult, 

 the first moult not having been observed, for there is very little 

 difference in the appearance of the larva before and after moult- 

 ing, the only means of being sure of the time of moulting being to 

 find the cast skin, which is a difficult task when the larvae are in 

 the webs. 



From the i6th to the 17th of the month the larvce grew rapid- 

 ly. They had now reached nearly full size, and very little change 

 took place in them during the next two days, although they 

 thickened up a little and showed more white between the dorsal 

 plates. Aug. 21, one was removed from the cage to be sketched. 

 They had now stopped feeding, and during;- the next three days 

 they dug into the sand somewhat. During this time one of them 

 died. Aug. 24, the remaining larva took a position on the inner 

 side of a leaf that lay on the sand and remained in this position 

 for two days, pupating on the 26th, thus completing the larval 

 state in sixteen days. The pupa was apparently normal, but, 

 being used to sketch from, w^as injured and died. 



Aug. 5, a web of H. cunea^ in which were several Plochio7ius 

 larvae, was placed in a pot of sand and covered with a one-gallon 

 bell-jar having an open top over which a piece of muslin was 

 tied, and mulberry leaves were daily placed in the jar as food for 

 the webworms. These leaves were soon covered by their web, 

 after which the larvae ate all of the enclosed leaves excepting the 

 midrib and larger veins. Other larvae of P. timidus were placed 

 in the jar from time to time, and seemed at home in this web 



* This specimen did not succeed in freeing- itscll' from the pupa case, and died in a few 

 ays. 



