TILE CANADIAN ENTOMOLOGIST. 159 



collection producers and parasites emerged the following season, June, 



1891. The galls were all at the top of branches, as if from a deformed 



terminal bud ; rarely overtopped by a growth of stem a little above the 

 gall, with a few leaves. 



Collected in Casci ravine, April 23, 1893, and north of Howard Park, 

 May 8, 1893, where ( the galls were numerous, a large series of specimens. 

 From May 21 to June 27, 1S93, numerous producers emerged, and from 

 May 8 to May 29, 1893, two species of small parasites emerged. July 17, 

 1893, specimens of the moth were sent to Dr. Riley, and of the parasites 

 to Dr. Ashmead. 



July 29, 1893, reply from Riley: "Unknown to me"; "Should be 

 described "; and from Ashmead a few days later : " Doubtless new 

 species"; " Will describe." 



August 1, 1893, three specimens of mature moth taken while sweeping 

 with hand net in Howard Park. 



August 11, 1893, specimens again taken while collecting in Rosedale. 



Collected from March 3 to April 10, 1897, at Grimsby, Mount Dennis 

 and Scarboro heights, 57 Ceanothus galls. From May 24 to June 12, 

 1897, numerous producers emerged. 



This shrub, C. Americana, and the rather peculiar galls very common 

 this year, 1897, on the ridges of King and Whitchurch townships, from 

 Yonge St. to Uxbridge. Mr. Cosens has described the gall, the larva and 

 mature moth in The Canadian Entomologist, Vol. 40, p. 107. 



Diplosis punicei. 



Cecidomyiid galls are found on leaves and stems of herbaceous 

 plants, on leaves and twigs of shrubs, and trees, and deformed buds and 

 flowers. The Cecidomyiid galls are morphologically as destructive as the 

 producers ; this may be said of galls generally, so that a description of 

 the gall may be even more specific than a description of the producer 

 as expressive of the biological relations between the "animal and the 

 plant." 



From 1887 to 1902 I found these galls common on Aster puniceus, 

 one of our fine vigorous flowers which is very common, growing in wet 

 ravines everywhere around Toronto. From 1S90 to 1898 I made 

 annual collections of galls in the spring and in the fall. The galls are on 

 branches of the flowering panicle ; they are spindle-form swellings of the 

 branches, and in size range from 5x10 mm., diameter of stem below gall 

 2^ to 5 x 15 mm. The galls are one-celled, the larvae of a pale straw 



