73 



only. These observations carried out on Pedicvlus Jiumanus are 

 described. The results show that it 15 pounds pressure is produced 

 in the disinfector within 5 minutes and kept up for another 10 minutes 

 with a 10 inch preliminary vacuum and a 10 inch drying vacuum a 

 temperature of 167° F. (75° C.) is obtained, which is sufficient to kill 

 the Uce. Individual bundles of garments in the disinfector itself 

 must not be packed too tightly. 



Moore (W.) & Hirschfelder (A. D.), An Investigation of the Louse 



Problem.^ Research Publications Univ. Minnesota, Minneapolis, 

 viii, no. 4, July 1919, 86 pp., 2 figs., 6 charts, [Received 4th 

 February 1920.] 



This paper deals with methods of rearing lice, the pathological 

 effects of the bite of the clothes-louse {Pediculus himanus), and its 

 destruction. 



It is summarised by the author as follows : Lice may be reared 

 under incubator conditions in large numbers, if fed with human blood 

 twice daily, but under such conditions the life- cycle is slowed down, 

 and the daily and total egg-production per female is reduced. Fever, 

 rash, and a general lassitude are produced as a result of the louse 

 bites. Lice and their, eggs are destroyed by the ordinary laundering 

 processes used in the washing of cotton and khaki goods ; for woollens 

 slight alterations in the methods of washing are necessary. Chloropicrin 

 may be used for fumigation of garments, accomplishing the desired 

 results in a short period of time with a small quantity of the chemical, 

 without the use of high temperatures. The sachet method of con- 

 trolling lice is ineffective or very expensive. Louse powders may be 

 used with success but, being a wasteful method of applying an 

 insecticide, are not recommended. Impregnation of the underwear 

 is the most promising method of louse control between lousings. 

 Active chemicals of very low volatility are necessary to prove effective 

 for the longest period of time. Halogenated phenols, such as dibrom- 

 metacresol, dichlormonobrommetacresol, and their sodium salts, 

 dibromcarvacrol and dibromxylenol, were found to be the most 

 promising under laboratory conditions. 



Tryon (H.). Report of the Entomologist and Vegetable Pathologist. 



— Ann. Rep. Queensland Dept. Agric. & Stock for the Year 1916- 

 1917, Brisbane, 1917, pp. 49-63. [Received 11th February 1920.] 



The parasites recorded include : The dog tick, Rhipicephalus 

 sanguineus, which is reported from the Northern Territory ; Ixodes 

 holocyclus, Neum., which occurs on many animal hosts including 

 man ; Haeniaphysalis papuana, Thorell ; the bot-fly, Gastrophilus 

 nasalis, which is apparently spreading and is found in certain districts 

 on the wing as early as 1st October ; Hippobosca equina ; Ortholfersia 

 macleayi, which was found on a marsupial and on a horse. 



Special investigations have been carried on in connection with 

 sheep-maggot fhes, the species dealt with including Anastellorhina 

 augur (mottled blow-fly), Pollenia stygia {villosa) (large yellow blow- 

 fly), Neocalliphora ochracea (large red blow-fly), Calliphora incisoralis 

 (dark blue blow-fly), Chrysomyia (Pycnosoma) rufifacies (golden-green 

 blow-fly), C (P.) varipes (small green blow-fly), Lucilia sericata 



(668) B 



