60 



Jack (R W.). A Form of Myiasis in Cattle. — Rhodesia Agric. Jl., 

 Salisbury, xv, no. 6, December 1918, pp. 539-540, 1 plate. 



This paper deals with a fly, allied to Chrysomyia (Pycnosoma) 

 margimilis, bred out from maggots said to have been taken from large 

 cavities in the subcutaneous tissues of cattle. This fly, which does 

 not appear to have been associated with myiasis before, probably 

 breeds as a rule in decaying meat. Whether eggs are laid, or whether 

 the maggots are extruded alive, is unknown, but after completing 

 their feeding they reach the ground which they penetrate, if possible, 

 in order to pupate, the pupal stage, in the laboratory, occupying 14 

 days. 



For the treatment of infested cattle, chloroform or hydrogen 

 peroxide should be poured into the wound, care being taken that it 

 Teaches all the cavities caused by the maggots. Any of the carbolic 

 disinfectants in common use may be applied, and a solution of peach 

 leaves will be found most useful. After cleansing with any of these 

 solutions, the wound should be dressed with carbolic ointment or 

 Stockholm tar to assist in healing and to prevent further infestation. 



Hardy (G. H.). Notes on Tasmanian Diptera and Description of New 

 Species. — Papers & Proc. R. Soc. Tasmania for Year 1917, Hobart, 

 25th February 1918, pp. 60-66. [Received 4th February 1919.] 



Among the Diptera dealt with in this paper, the new Tabanids 

 described include Pelecorhynchus igniculus, and P. albolineatus. 

 P. montanus, Hardy, is now considered to rank as a distinct species 

 and not as a local race of P. eristaloides, WI1<., and is further described. 

 The habitat of all these species is Cradle Mt., at about 3,700 ft. eleva- 

 tion. A key is given to all the known Tasmanian species of this genus. 



Williams (T. H.). Lice and Tick on Sheep.— JZ. Dept. Agric. 

 S. Australia, Adelaide, xxii, no. 3, October 1918, pp. 224-232, 

 7 figs. [Received 6th February 1919.] 



Trichodectes sphaerocephalus (sheep louse) was probably introduced 

 into South Australia on imported Lincoln sheep about 30 years ago. 

 No effort was made to check the spread of the parasite till 1890, and 

 at the present day all breeds of sheep are attacked. Merinos being the 

 worst sufferers, and the parasite has become acclimatised even in 

 the northern districts and breeds continuously on undipped sheep. 

 It is calculated that there will be a decrease of from 15 to 20 per 

 cent, in the State wool clip if sheep are not dipped and if the pest 

 continues to increase as it has done during the past two years, to 

 say nothing .of the enormous loss of meat due to infested sheep failing 

 to thrive. 



Legislation concerning the compulsory dipping of sheep m infested 

 areas has been in force since 1915, enacting that all such sheep must 

 be immersed in a bath consisting of an approved arsenious preparation 

 in which they must remain for not less than one minute. Dipping 

 in non-poisonous carbolic solutions, or hurrjdng freshly-clipped sheep 

 even through arsenious dips have proved to be of Uttle or no value. 



