140 THE CANADIAN ENTOMOLOGIST. 



Type.— Cat. No. 5729, U. S. N. M. 

 Hab. — Outspoorn, South Africa. 



Host. — Hym. : Prospalta aurantii, How., infesting a Mytilaspis sp. 

 on Salix Capensis. 



THE LIFE-HISTORY OF THE GREENHOUSE LEAF-TYER. 



(Phlyctamia ferrugalis, Hbn., = Botis Harveyana, Grt.) 



BY DR. JAMES FLETCHER AND ARTHUR GIBSON, OTTAWA. 



The larva? of Phlyctceiiia ferrugalis, Hbn., have been since 1897 

 the cause of some loss to roses in the large houses of Mr J. H. Dunlop, 

 Toronto. References to this occurrence will be found in the Reports of 

 the Entomologist and Botanist to the Dominion Experimental Farms for 

 1899 and 1900. 



On the 12th November, 1900, a visit was paid to the above houses by 

 Mr. Gibson, and specimens of the mature larvae found feeding both on 

 violets and chrysanthemums were secured, as also some larvae in other 

 stages of development. These all changed to pupae, and in due course 

 the moths appeared, the pupal state lasting from 17 to 20 days. 



On the 4th December six moths, which had just emerged (the 

 whole six within three days), were placed in a muslin bag over a viole 1 

 plant. On the 7th December a large number of fresh eggs were 

 noticed. They were laid on the under side of the leaves, sometimes 

 singly, in pairs, in rows of 3 or 4, or in clusters of from 3 to 7, placed close 

 together and overlapping at the edges. 



The following notes, describing the egg and larval stages, were made: 



Egg. — 0.5 mm. in width, round in outline, much flattened, slightly 

 raised in centre, pearly white, coarsely reticulated, and, from their flattened 

 appearance, remarkably like those of the Codling Moth. Before hatching, 

 the black heads of the young larvae are very apparent through the shell. 



The eggs which were laid on the 7th December hatched in a warm 

 office on the 21st December, making the duration of the egg state 14 

 days. 



Stage I. — Length, 2 mm. General appearance, semi-translucent 

 creamy-white larva?, body bearing long whitish hairs. Head 0.2 mm. 

 wide, rather flattened, horizontal, inclined to be wedge-shaped, large, 

 deep black, shining, and bearing slender whitish hairs. Mouth-parts pale 

 brownish. Tubercles on segments piliferous and faintly darker than body, 



