PROCEEDINGS, 1918 9 



Diptera 2, and Hymenoptera 2. Of these 33 new species and varieties, 

 no less than 22 were described from material collected by members of 

 this Society, divided as follows: E. H. Blackmore, 9; J. W. Cockle, 5; 

 late Capt. Harvey, 3; E. M. Anderson, 2; G. O. Day, 1 ; A. W. Hanham, 

 1 ; and the late Tom Wilson, 1. This is a showing of which we should 

 be proud, and should spur our individual members on to greater efforts, 

 for much work remains to be done in each and every order. 



It has given me much pleasure to place these facts before you, and 

 perhaps I have put them in a rather unconventional manner, but if so 

 I must beg your forgiveness, as I have only done what I have thought to 

 be right and in the best interests of the Society. 



LIFE-HISTORY OF THE LEAF-EATING CRANE-FLY 

 CYLINDROTOMA SPLENDENS, DOANE (DIPTERA, TIPULIDAE) 



By Alfred E. Cameron, M.A., D.Sc, F.E.S., Technical Assistant, 

 Entomological Branch, Department of Agriculture, Ottawa 



INTRODUCTION 



Previous to the discovery of the larvae of Cylindrotoma splendens 

 by the author and Mr. E. W. White of Victoria, at Westholme, Van- 

 couver Island, the species was known only from Alaska, and apparently 

 the female had not been found. The original description of Doane 

 (1900) was made from three male specimens, and Coquillet (1901) 

 re-described the species under the name of Cylindrotoma juneta from a 

 single male specimen. 



In addition to the fact that the author, in the present work, obtained 

 in the course of breeding all the pre-adult stages for the first time and 

 described them in a paper recently read before the Annual Meeting of 

 the American Entomological Society at Pittsburg, it may be remarked 

 that never before had the immature stages of any species of the genus 

 Cylindrotoma been found on the American continent. 



The tribe Cylindrotomini occupies an isolated and intermediate posi- 

 tion between the Tipulidae brevipalpi and longipalpi. The structure of 

 the adult flies, especially as regards certain details of the venation of the 

 wings, is quite unique, but it is in the immature stages of the different 

 genera that the most interesting distinctions are found. The larvae, 

 instead of living in the mud along the banks of streams or in rotten wood, 

 as do the majority of the known crane-fly larvae, dwell upon the leaves 

 of various terrestial and aquatic plants ; instead of being brown or grey 

 in colour, they are bright green and usually resemble the leaves of their 

 host-plants to a very remarkable degree. 



