142 THE CANADIAN ENTOMOLOGIST. 



In this paper, he considered the vast number of species, now known 

 in the world, to belong to a single large family which he called the 

 Te?ithredi?iitce, and then separates it into three subfamilies as follows : 

 i. Lydetse, ii. Siricette, and iii. Tenthredinelae. The Lydetse he divides 

 into four tribes: (i) Lydini, (2) Cephini, (3) Pinicolini, and (4) Blasti- 

 cotomi7ii ; the Siriceta^ into three tribes : (5) Xiphydriini, (6) Siricini, 

 and (7) Oryssini ; while the Tenthredinetse he divides into four tribes : 

 (8) Ci??tbici?ii, (9) Argi?ii, (10) Lophyrini, and (11) Tenthrediiimi. 



Many of these he again subdivides into subtribes, which agree in 

 the main with some of the subfamilies of other authors. 



Since this publication appeared, he has, in several very valuable c 

 tributions, still further elaborated his system, and in many clear and ai 

 mirable tables has greatly enlarged our knowledge of genera and species. 



The present status of Konow's systematic work in the group is 

 probably well expressed in Dr. Von Dalla Torre's "Catalogue of the 

 Tenthredinidae," representing Vol. I. of his Catalogus Hymenopterorum , 

 published in 1894, and which, in the main, appears to be arranged in 

 accordance with the views published by Konow, up to date of publication. 



In this Catalogue, 18 subfamilies are recognized, arranged in the 

 following sequence: (i) Delerince, Thomson, 187 1; (2) Tenthredinidce, 

 Newman, 1834; (3) Selandriida:,'Y\\ovi\%or\, 187 1; (4) Blennacampincz, 

 Konow, 1890; (5) Hoplocampince, Konow, 1890; (6) Nematince^ Thom- 

 son, 187 1; (7) Lophyrince, Thomson, 187 1; (8) Fierygophorince, Cam- 

 eron, 1878; (9) Lobocerince, Kirby, 1882; (10) Hy/oiomintx, Newma-n, 

 1834; (11) Ciinbic'nice, Leach, 1817; (12) Oryssince, Newman, 1834; (13) 

 SiriciiiXt Newman, 1834; (14) Xiphydrii?ice, Thomson, 1871 ; (15) 

 Blasticotoinince, Thomson, 1871; (16) Xyelifice, Newman, 1834; (17) 

 Cephijice, Westwood, 1840; and (18) Pamphilimce, Dalla Torre, 1894. 



I have gone somewhat particularly into the present arrangement of 

 these insects, and probably further than was really necessary as an intro- 

 duction to the present series of papers on their classification : ist, Because 

 my own views are so at variance with other systematists ; 2nd, Because I 

 have recognized no less than 15 distinct families; and, 3rd, Because I 

 have separated, quite widely, groups and genera that were previously 

 placed together or in juxtaposition. 



This separation will become more apparent in the articles that are to 

 follow the present introductory paper, which will include synoptic tables 

 for the recognition of the genera of the world. 



