526 



cold paraffin mixed in equal parts with either cedar-wood, linseed, 

 or a heavy mineral oil, gives partial immunity from infestation ; these 

 applications should be made from early April to September. For 

 timber in stores and sheds, better deterrents are orthodichlorobenzene, 

 applied with a brush or sprayer, the top layer being thoroughly wetted , 

 or paradichlorobenzene scattered on the top of the stack or suspended 

 in bags from the roof of the shed. Either of these is most effective 

 at temperatures of 60° F. and upwards. Another treatment for 

 material that is already infested is dry heat, the wood being gradually 

 heated to 149° F., or moist heat at 158° F., the temperature being 

 maintained in both cases for two hours for 1 in. thick material, with 

 an additional hour for each extra inch of thickness. Fumigation in 

 air-tight stores with hydrocyanic acid gas for 24 hours for f in. thick 

 timber is effective at normal temperature, or 1 pint of chloropicrin 

 per 1,000 cu. ft. for 24 hours at 75° F. and upwards. Fumigation 

 with a specially constructed plant, which has not yet been used in 

 this country, is described ; by this method carbon bisulphide also 

 can be used with success, while the risks attending ordinary fumigation 

 are almost eliminated. 



Roebuck (A.). Experiments on Cultural Methods of Controlling Onion 



Fly {Hylemyia antiqua, Meigen = Phorbia cepetorum, Meade). — 

 Bull. Chamber Hortic, London, \, pt. 1, July 1922, pp. 8-10, 

 4 figs. 



Of the various cultural methods tested for the protection of onions 

 from Hylemyia antiqua, Meig., sets and transplants both from autumn 

 sowing and sowing in heat show a marked superiority over spring 

 sowing. 



KuwANA (I.) & Tanaka (K.). Hompo ni okeru Saboten ni kisseisura 

 atarashiki Kaigaramushi ni tuki. [A new Eriococcus on Cactus 

 from Japan.] — Konchu Sekai [The Insect World], xxvi, no. 299, 

 1922, pp. 215-221. 



An interesting species of Eriococcus, E. saboteneus, sp. n., has been 

 found by the authors on cultivated cacti in Yokohama and near 

 Tokyo. The Coccids are always found scattered upon the surface 

 of the stems and never in swarms, as in the case of other species of 

 the genus. The larvae hatch most abundantly at the end of May, 

 though hatching continues until the beginning of July. The male 

 larva when mature migrates to the spines, where it spins a cocoon, 

 but the female always remains upon the stem surface. 



Marshall (G. A. K.). On the Australian Fern Weevils. — Bull. Ent. 

 Res., London, xiii, no. 2, August 1922, pp. 169-180, 3 plates. 



In the course of a study of the Australian fern weevil, Syagrius 

 fulvitarsis, Pasc, undertaken by Mr. C. E. Pemberton in New South 

 Wales, for the purpose of obtaining parasites to introduce into Hawaii 

 for its control there, a number of other weevils were found attacking 

 wild ferns. 



These include several new species here described, namely, Syagrius 

 costicollis, S. pembertoni, S. squamipes, Neosyagrius porosus, and 

 N. striatus. A key is given to the species of Syagrius. 



