514 



Aguil6 (I.). La Cochinilla ae los Olivos y sus Enemigos. [The 

 Olive Scale and its Enemies.] — Rev. Inst. Agric. Catalan S. Isidro, 

 Barcelona, Ixix, no. 18, 20tli September 1920, pp. 296-299. 



Some observations on the life-history of Saissetia {Lecanium) oleae 

 in Spain are recorded. In 1920, no eggs hatched before 25th June. 

 From then till mid-September both eggs and scales were seen. 



The injury done by S. oleae and the various combative measures 

 employed against it are described. Two natural enemies were 

 observed : a Noctuid moth, Eublemma {Thalpochares) scitula, and a 

 Chalcid, Scufellista cyanea. The latter occurs in abundance, but as 

 the early scales escape its attack its action is limited to reducing the 

 amount of infestation. 



Brethes (J.). La Diatraea saccharalis en la Provincia de Buenos 

 Aires. — Anales Soc. Rural Argentina, Buenos Aires, liv, no. 16, 

 1st September 1920, pp. 943-948, 6 figs. 



The presence is recorded of larvae of the Pyralid, Diatraea saccharalis, 

 in maize stems from the Province of Buenos Aires, where it has not 

 hitherto been observed, although it has been known in the more 

 northern provinces of Argentina. The life-history and habits and the 

 usual remedial measures against this moth are discussed. 



Gemmill (J. F.). Wheat-Bulb Disease. — Nature. London, cvi, no. 

 2657, 30th September 1920, p. 148. 



It is pointed out that Kleine's conclusions in reference to Hylemyia 

 coarctata [R.A.E., A, \aii, 253] are misleading. Observations show 

 that the eggs are chiefly laid on fallow land and among root crops, 

 especially potatoes [see however loc. cit. 266, 269]. 



This fly has caused much damage in the east of Scotland, and is 

 apparently spreading. 



SuBRAMANiAM (P. Y.). Life History of the Buprestid Leaf miner 

 {TracJiys bicolor, Kerremans), a Pest on Butea frondosa in Mysore. 

 — Jl. Bombay Nat. Hist. Soc, Bombay, xxvii, no. 1, 1st July 1920, 

 pp. 178-179, 1 plate. 



TracJiys bicolor is a serious pest of Butea frondosa in Mysore. The 

 adults feed on the leaf-tissue and may be seen from April to about 

 February or March. About four to five broods occur during the year. 

 The eggs are laid singly or in groups of 2 or 3 on the upper surface of 

 the leaves at the junction of the veins with the midrib. The larvae 

 hatch in about 19 days, and at once begin to eat into the leaf-tissue 

 and continue feeding for about a month. Pupation occurs in the 

 cavity thus formed and lasts about nine days. 



The Natural enemies of this beetle include a small black ant, Cam- 

 jponotus sp., that feeds on the eggs, and a Chalcid that parasitises the 

 larva. 



