47 



being when the locusts are from 15 to 20 days old. At an earlier date 

 contamination is very slight, and later on, individuals of varying ages 

 and resistance are present, so that the virus is weakened. In con- 

 clusion, it is stated that the good results yielded by Coccobacillus 

 acridiorum are undeniable, and in spite of the many imperfections of 

 this system, it should be largely used against new invasions, in 

 conjunction with other methods. 



Benoist (R.) Sur VEniomognatlms brevis, Lind. [Sphegidae], 

 Hymenopt§re chasseur d'Altises. [On Entomognathus brevis, a 

 Hymenopteron predaceous on Haltica spp.] — Bull. Soc. 

 Entom. France. Paris, no. 15, 13th October 1915, pp. 241-242. 

 [Received 8th December 1915.] l/ . 



In the nests of the Crabronid, Entomognathus brevis, Lind., from '^' 

 20 to 25 Haltica were found in each cell. As a nest contains about 10 

 cells, large numbers of these beetles must be destroyed by this common 

 wasp. 



Ritchie (W.). The Smaller Pine Beetle {Myelophilus minor, Hart.) in 

 Aberdeenshire. — Scottish Naturalist, Edinburgh, no. 48, December 

 1915, pp. 352-355, 5 figs. 



Specimens of the bark-boring beetle, Myelophilus minor, were found 

 in considerable numbers in a Scots pine wood near Aboyne during 

 August 1915. The mother-galleries of this species are cut deeply into 

 the sapwood in a transverse direction, while the larval ones run 

 vertically. When the larvae are mature, the tunnels become trans- 

 verse. Pupation takes place within the host. Living trees are usually 

 attacked, but occasionally felled logs and stumps serve as food. The 

 larvae are attacked by parasitic Hymenoptera. 



Imms (A. D.). Notes on Beet or Mangold Fly. — Jl. Bd. Agric, London, 

 xxii, no. 9, December 1915, pp. 881-884. 



Pegomyia hyoscyami var betae, Curt, (beet fly) occurs over the greater 

 part of the British Isles and is widely distributed throughout Europe. 

 The number of plants attacked is considerable, and includes beet, 

 mangold, spinach and common weeds such as henbane, deadly night- 

 shade, orache, white goosefoot and nettle-leaved goosefoot. The 

 attacks of the fly are intermittent ; in some years it is very destructive, 

 at other times its numbers, owing to unknown factors, are reduced 

 to a negligible quantity. [See also this Review, Ser. A, ii, p. 616.] 



The Turnip Gall Weevil. — Jl. Bd. Agric. London, xxii, no. 9, December 

 1915, pp. 884-887, 5 figs. 



Ceufhorrhynchus pleurostigma, Marsh., is frequently a source of con- 

 siderable loss in turnip and cabbage crops. Adults emerge from the 

 pupae in spring and summer and the females oviposit in or on the roots 

 of the food-plants. The larva, upon hatching, feeds on the root and 

 thus produces a gall. Pupation occurs in the soU. The duration 



