100 



depredations in houses, bakeries, etc., are described. Though cock- 

 roaches have not been definitely proved to convey disease to man, 

 it is quite possible that they may do so ; they contaminate food and 

 render it unfit for consumption, and sometimes do actual damage. 

 All places that might provide an entrance for them, such as brick 

 and tile work around fireplaces, entrance holes of pipes, etc., should 

 be cemented up. This should be followed by the use of an insect 

 powder, such as three parts of sodium fluoride to one part of pyrethrum 

 powder, which should be scattered about at night and swept up and 

 burnt with the dead insects next morning ; powdered borax and some 

 sweet substance, or a mixture of one part plaster of Paris and two 

 parts sugar may be substituted. Phosphorus paste is efficacious, but 

 is dangerous to^ animals ; it is used by spreading on cardboard and 

 placing in the runways of cockroaches. Traps, of which several are 

 described, are useful in places where powder cannot be spread. Stale 

 beer and peeled bananas have proved the best baits, and may be 

 placed in a jam jar covered with a cardboard lid pierced with a wide 

 hole through which a funnel-shaped paper cone is inserted. Fumi- 

 gation with 2 lb. sulphur per 1,000 cu. ft., or carbon bisulphide in the 

 same proportion, is efficacious, the room being closed for at least an 

 hour with the former treatment and for 36 hours with the latter. 

 In places that can be conveniently so treated, a temperature of 130° F. 

 may be used to kill the cockroaches, sufficient time being allowed for 

 the heat to penetrate to their hiding-places. 



StGUY (E.). Note surTArinure genitale du Cnlex jiigonmi, Villen.— - 



Bull. Soc. Entom. France, Paris, 1921, no. 3, 9th February 1921, 

 pp. 39-40, 1 fig. 



The characters of the male genital armature of Culex jugorum, 

 Vill., are described and illustrated. These distinguish the males 

 of this mosquito from those of any other species of the group of 

 Aedcs communis, in which C. jugorum should be placed, next to 

 A. [Ochlerotatus) stictus, Mg. 



Be 41. (W. P. B.). Report on Live Stock Industries of the Northern 

 Territories, Gold Coast.— MS. Report, dated 27th May 1920, 

 97 pp. _|_ 7 appendices, comprising 4 maps. (Abstract in Trop. 

 Vet. Bull, London, ix, no. 1, 28th February 1921, pp. 36-50.) 



This is a report on the present-day conditions of rearing live-stock in 

 the Northern Territories of the Gold C6ast ; measures by which the 

 future of this industry might be improved are suggested. 



It has been maintained [7^. yl.£., B, vi, 97] that a thorough search 

 would reveal t.setse-flies everywhere, but the author considers that 

 there are areas in the Territories free from them, varying from 1 to 

 10 sq. miles in extent. Glossina nwrsitans is fairly common, and is 

 an inland fly not seen in pure savannah districts, but occurring in the 

 so-called savannah forest districts. G. tachinoides is very common, 

 but is confined to the river system. During the rains it may be 

 found alongside rivers with grassy banks, but is chiefly confined to 

 rivers with banks covered with shrubs and small scrub. G. palpalis 

 is comparativelvrare, and is chiefly found on river banks covered with 

 a dense undergrowth. Among the indigenous live-stock, outbreaks of 



