399 



sending enquiries immediately any damage is observed, in order that 

 control measures may be undertaken without delay. Clean farming, 

 the securing of vigorous growi;h in young plants and good cultivation 

 are recommended as the best protective measures against insect 

 attack. 



SwAiNE (J. ]\I.). Canadian Bark-Beetles. Part I. Descriptions of 

 New Species. — Canada Dept. Aqric, Ottawa, Bull. no. 14, February 

 1917, 32 pp. [Received ind July 1917.] 



This is the first of a short series of bulletins on the species of bark- 

 beetles found in Canada, with their life-histories and bionomics. The 

 beetles constitute the chief insect enemies of the Coniferous trees in 

 the Canadian forests and cause enormous losses by their depredations. 

 The species described in this bulletin include 39 new species, and two 

 new genera are erected. 



Illixgworth (J. F.). Notes on Life-History of Attagenus plebejus, 

 Sharp. — Proc. Hawaiian Entom. Soc, Honolulu, iii, 4, May 1917, 

 pp. 287-288. 



This destructive household beetle [Attagenus glariosae, F.] does not 

 seem to occur outside the Hawaiian islands. Newly emerged adults 

 were confined in a covered glass dish for 36 days before the first eggs 

 and newly hatched larvae were discovered. The larval period consists 

 of seven instars and the pupal stage lasts 12 to 14 days, the whole life- 

 cycle occupying about 150 to 160 days. Carbon bisulphide destroys 

 the insects, but a second treatment is found necessary, indicating the 

 probability that the eggs are not destroyed by this method. 



Illingworth (J. F.). Webbing Clothes Moth predaeeous. — Proc. 

 Hawaiian Entom. Soc. Honolulu, iii, no. 4, May 1917, p. 274. 



Larvae of Tineola, biselUeUa, Hummel, having been taken from 

 brushes, upon which they had fed, were placed in a test-tube with 

 bits of tissue paper so that they might pupate. Several cocoons mth 

 almost mature pupae were put in with them. The larvae, being 

 without food, dug into these cocoons in the night and ate the Hving 

 pupae before spinning their own cocoons. 



Illingworth (J. F.). Economic Aspects of our predaeeous Ant 



{Pheidole tnegacephala). — Proc. Hawaiian Entom. Soc, Honolulu, 

 iii, no. 4, May 1917, pp. 349-368, 1 plate. 



In spite of the popular notion that ants are noxious insects, the 

 author agrees with several leading students of the subject in 

 considering that as a group they are eminently beneficial, not only 

 in the removal of myriads of dead insects, but also as an important 

 factor in the destruction of the living. A large colony is estimated 

 to collect some 100,000 insects daily during their greatest activity. 

 The worst enemies of ants are other species of ants, and it is frequently 



