86 



in New York State, and from whose writings (1. c.) the following 

 account of the life history is in the main compiled, appears in ordinary 

 seasons in the vicinity of Alban}^ about the middle of April. Its eggs 

 are laid at night and presumably on the terminal leaves of rose bushes 

 when they are pushing out from the buds. The caterpillar or larva, 

 after hatching, begins by binding together the margins or surfaces of 

 a folded leaf. With an increase of size the leaf, partly eaten and 

 opened out by its rapid growth, is abandoned for another, or the larva 

 selects two contiguous leaves and fastens them together. This habita- 

 tion in turn, with the more advanced growth of the creature, is 

 deserted for still more ample quarters, which it finds among several of 

 the terminal leaves or in the unopened buds, as has been shown by 

 recent observation in the District of Columbia. 



Larval growth is rapid and at each successive molt the papillae or 

 piliferous warts and the hairs proceeding from them become more con- 

 spicuous. By the end of May the larvae have attained full maturity, 

 cease feeding, and are then believed to drop to the ground to undergo 

 their final transformations among the dead leaves. The reason for 

 this belief is that the pupae have never been found among the folded 

 or fastened leaves on the rose bushes. 



The period of pupation is about nine or ten days. The moth of the 

 first generation has been observed abroad at Alban} T as early as June 2. 

 Eggs are laid for a second generation and the new operations of the 

 caterpillars are soon to be seen and are extended into July. Dr. Lint- 

 ner expresses the opinion that there is possibly a second generation, 1 

 since the transformations among insects of this class are quite rapid 

 and several generations are of common occurrence in many species. 

 The latest date recorded near Albany was Juty 25. 



The fact of our rearing this insect to the adult from larvae taken in 

 December would seem to indicate that there may be three, or perhaps 

 even four, distinct generations developed each } T ear, under glass at 

 least, in a climate like that of the District of Columbia. 



As the name of rose, leaf -tyer is preoccupied by Pentliina cyahana, 

 which will presently receive mention, rose bud-worm is proposed as a 

 suitable appellation for this insect. 



A PARASITIC ENEMY. 



One larva received from Anacostia was seen to be parasitized, the 

 parasites being noticed in the larval condition from July 11 to 13. 

 The adult parasites began to issue July 15 and were identified b} T Mr. 

 Ashmead as Eulophus cyriades Walk., a Chalcidid fly. 



1 In speaking of the different generations, Lintner mentioned the first appearing 

 moths as one brood, and the first generation hatched during a year (which the writer 

 considers the first generation) as a second brood, and the second generation as the 

 third brood. 



