555 



Iacobson (G. G.). aeMJiflHbix BnoiUKax (Coleoptera, Chrysomelidae, 

 Halticini). [On Flca-bcetles (Coleoptera, Chrysomelidae, 

 Halticini).] -BfOJineieHb 2-ro BcepoccuMCKoro 3htomo- 

 OnTonaTOJiorMHecKoro C'esAa b neiporpafle 25 30 OktaSph 

 1920 r. [Bull. 2nd All-Eiissian Entomo-Phytopaih. Meeting, 

 Petrograd, 25-30th October 1920], Petrograd, no. 7, 1st December 

 1920, pp. 4-6. [Received 27th September 1921.] 



A brief account is given of the Halticini in general, their anatomy, 

 classification and distribution in Russia and Siberia. 



Rimski-Korsakov (M. N.). flapasMTbi HacBKOMblx, BpeflflmMX 



Pbl60B0flCTBy. [Parasites of Insects injurious to Pisciculture.] — 



BwjiJieTeHb 2-ro BcepoccniiCKoro SHTOMO-OnTonaTO/iornHecKoro 

 C'esAa b neiporpaAe 25-30 0KTfl6pfl 1920 r. [Bull. 2nd All- 

 Rtissian Entomo-Pliytopath. Meeting, Petrograd, 25-30th October 

 1920], Petrograd, no. 7, 1st December 1920, pp. 6-8. [Received 

 27th September 1921.] 



The application of the biological method in controlling the insects 

 injurious to fish culture is urged, and a list of their parasites occurring 

 in Russia is given. These are chiefly Mymarids and Trichogrammatids, 

 and include Prestwichia aquatica, Lubbock, parasitic on eggs of 

 Dytiscus, widely distributed in Central Russia ; P. solitaria, Ruschka, 

 parasitic on the eggs of various dragonflies {Aeschna, Lestes, Agrion) ; 

 Cataphractus cinctits, Haliday ; C. rediictus, sp. n. ; Anaphes dytisci- 

 daritm, sp. n. ; Anagrus siibfuscus, Forst., a parasite of the eggs of 

 Agrion, Lestes and Calopteryx ; Mestocharis sp. ; and a Eulophid, 

 parasitising eggs of various dragonflies. 



Most of the species recorded have three and sometimes four generations 

 a year. The entire development of the parasites takes place in the 

 egg of the host, with the exception of the Eulophid, in which case 

 the full-grown larva emerges from the egg and lives on aquatic plants, 

 where pupation also occurs. 



Reichardt (A. N.). flonrOHOCMKax M3 POAa Ceuthorrhynchus, 

 Germ., BpeAHlMMX KpeCTOl^BeTHblM. [Ceuthorrhynchus spp. in- 

 jurious to Cruciferae.l — BlOJlJieTeHb 2-ro BcepoccMMCKoro Shtomo- 

 (DmonaTonorMHecKoro C'esAa b neiporpaAe 25-30 OkthSpa 

 1920 r. [Bull. 2nd All-Riissian Entonw-Phytopath. Meeting, 

 Petrograd, 25-3()th October 1920], Petrograd, no. 7, 1st December 

 1920, pp. 28-30. [Received 27th September 1921.] 



Ceuthorrhynchus quadridens, Panz., is the chief weevil pest of 

 kitchen gardens in the Petrograd district. It probably also occurs 

 in the Moscow and Kiev districts. In the Petrograd district the adults 

 appear about the middle of May, and the eggs are usuaUy deposited 

 in the midrib of the leaves or in the stalk of the plants, towards the 

 end of the month. The larvae are found in June, an average of 

 about seven to ten occurring in each plant ; occasionally as many as 

 twenty may be present. As a result of injury the plants may become 

 stunted in growth or even be killed, and the larval exit hole frequently 

 becomes the seat of secondary infection. The larvae are often found 

 together with those of Phorbia [Chortophila] sp., to which fly 

 the condition of the plant is often wrongly attributed. The larvae 

 of C. quadridens are parasitised by an Ichneumonid and a fungus. 



