216 



are expected to appear has proved to be effective, but this method 

 ^would be difficult to carry out in the high veld, where the young maize 

 is practicall}' the first green vegetation in the spring. 



■Aphelinus malt, the introduced parasite of the woolly aphis [Eriosoma 

 lanigerum] is still surviving near Pretoria and at Ventersdorp, but it 

 will apparently not prove of very material importance in suppressing 

 the Aphid, as the present indications are that it is not adapted to the 

 South African climate. 



The maize stalk borer [Busseola fusca] is expected to be more 

 abundant than usual, as a great deal of incipient attack was reported 

 during December. 



Great damage has been done in Natal and the Transvaal by the 

 elegant grasshopper [Zonocerus elegans]. To protect fruit trees 

 from this pest they should be sprayed with 3 lb. of lead arsenate 

 paste to 50 gals, water. For peaches, apricots and plums, onl}'' 2 lb. 

 of paste should be used. Orduiarj^ locust poisons, whether to be 

 used as sprays or poison baits, require to be made much sweeter than 

 is usual for true locusts. The formula suggested is 1 lb. sodium 

 arsenite, 6 lb. sugar and 12 gals, water. This solution is destructive 

 to vegetation and is best spread thinly over the ground close to the 

 plants on which the insects are feeding. In waste land the hoppers 

 appear to be most abundant on the common milkweed {Asclepias 

 fructicosa) ; this plant should therefore be carefully watched in the 

 \'icinity of gardens. Excellent results are obtained by fire where 

 this method is possible. The best method, however, of dealing with 

 this pest in gardens is b)^ collecting the young hoppers with nets in 

 the early morning. The newly hatched yoimg may be destroj^ed by 

 drenching with a solution of 1 lb. soap to 5 gals, water, or any. other 

 strong soap3'^ or oil}^ insecticide. 



Armitage (H. M.). a Practical Method of liberating Parasites of Black 

 Scale in the Field.— Ca/?/. Citrogr., vi, no. 8, 1921, p. 272, 3 figs. 

 (Abstract in Expt. Sta. Record, Washington, D.C., xlv, no. 9, 

 8th February 1922, p. 861.) 



In the method here described, the black scale [Saissetia oleae] on 

 food-plants in individual containers is subjected to the attack of 

 the parasite, Aphycus lounshuryi, in small cages, which are then 

 moved to open racks in a heated room in order to hasten the develop- 

 ment of the parasite. Before emergence actually takes place the 

 containers are taken into orchards in which the parasites are to be 

 used, and planted under the trees. By this method it is possible to 

 place an individual food-plant, infested with a maximum of parasitised 

 scale, under each tree in the orchard at a cost of less than £\ per acre. 



Hill (G. F.). On some Australian Termites of the Genera Drepano- 

 ternies, Hamitermes and Leucotermes. — Bull. Ent. Res., London, 

 xii, pt. 4, February 1922, pp. 363-400, 4 plates, 31 figs. 



This paper is intended to be the first of a series recording the results 

 of examination of a large collection of termites from various parts 

 of Australia. The new species described, with notes on their biology, 

 •are Drepanotermes silvestrii, D. septentrionalis , D. daliensis, Hamitermes 

 parvus, H.perplexiis, H. perplexus\'a.v.victoriensis,n., H.neogermaniis, 

 H. eucalypti and Leucotermes clarki. 



