92 



MoKRZECKi (S. A.). BflJiaia WMna wnn TroTWHOBun ipiinc [Thnps 

 tahaci, Lindem).— Tk)th)h. OpraH Ha CApyweHneio Ha EKcnopi- 

 MopMie M Oa5piiKaHTMTe na Th)th)h b BjirapMfl. [Tobacco: A 



Publication for the Furtherance of the Export and Manufacture 

 of Tobacco in Bulgaria], Sofia, ii, no. 31, 1st December 1921, pp. 1-2. 



A brief account is given of the damage caused to tobacco by Thrips 

 tabaci, Lind., in Bulgaria. The winged individuals appear at the 

 beginning of June. The eggs laid by this generation hatch in from 

 live to seven days, and the subsequent larval stage lasts about 20 days. 

 At the beginning of July another generation of winged individuals 

 makes its appearance. The larvae from the eggs of this generation 

 cause serious damage to the plants in July and August, especially 

 in dry seasons. During this period all stages of the insect may be 

 found on the leaves. A third generation may occur, but the chief 

 damage is caused by the larvae of the second generation. 



The remedial measures advocated include the disinfection of seedlings, 

 cultural methods with a view to increasing the vigour of the plants, 

 and spraying with a solution of 151b. of tobacco refuse, 16 gals, of 

 water and 5 lb. of common soap. 



MoKRZECKi (S.). B^pxy BMonomaTa na HeKOM hobm BpeAMTejiM no 



P03MTe B B^JirapHfl {Agrilus foveicolUs, Mars, & Syrista parreyssi. 

 Spin.). [On the Biology of some new Pests of Roses in Bulgaria.] — 

 TpYAOBe na ^tknv. Flpiip. fl-BO. [Troodovena Big. Prir. D-vo], 

 Sofia, ix, 1921, pp. 117-126, 4 figs. [Received 20th December 1921.] 



The information contained in this paper with regard to Agrilus 

 foveicolUs, Mars., on roses in Bulgaria has been noticed elsewhere 

 [R.A.E., A, ix, 496 ; x, 41]. Other species injurious to these plants 

 are A. coeruleus, Rossi, the larvae of which live under the bark, and 

 the Cephid, Serysta parreyssi, Spin., a stem borer. The latter pupates 

 in the gallery, and this stage lasts about three weeks. The sawfiies 

 appear about the 26th June and lay their eggs on the growth of the 

 second year. The larvae appear about the middle of the summer 

 and feed on the pith of the stem. At various distances in the galleries 

 circular ventilation holes are cut. There is one generation a year. 



Felt (E. P.). Javanese Gall-midges. — Treubia, Buitenzorg, i, no. 4, 

 August 1921, pp. 139-151, 5 figs. [Received 20th December 

 1921.] 



Among the species described in this paper are the following new ones : 

 Dasyneura elatostemmae , from petiole galls on Elatostemma ; Stefaniella 

 falcaria, from leaf galls on Avicennia officinalis ; S. orientalis from a 

 petiole gall on Lepidagathis javanica; Schizomyia laporteae from a petiole 

 or basal leaf gall on Laportea stiniulans ; S. nodosa from Moschosoma 

 polystachum ; S. villebrunneae from Villebrunnea rubescens ; Asphondylia 

 leeae from a fruit gall on Leea sambusina ; A . litseae from Litsea sp. ; and 

 A. strobilanthi from a gall on the aerial roots of Strobilanthus cernuus. 



DocTERs VAN Leeuwen (W. M.). Additional Notes to the Article of 

 Mr. E. P. Felt on Javanese Gall-midges. — Treubia, Buitenzorg, i, 



no. 4, August 1921, pp. 153-159, 9 figs. [Received 20th December 

 1921.] 



This paper describes some of the galls and deformities on the plants 

 caused by the midges described in the preceding paper. 



