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Feoggatt (W. W.). a New Parasite on Sheep-Maggot Flies. Notes 

 and Description of a Chalcid Parasite {Chakis caUiphorae). — 

 Qiieenshiiid Agric. Jl. Brisbane, vol. vi, no. 3. September 1916, 

 pp. 177-179, 1 plate. [Received Uh November 1916.] 



The subject matter embodied in this paper has already been 

 abstracted from another journal [see this Review, 8er. B, iv, p. 179]. 



Froggatt (W. W. & T. L.). Sheep-Maggot Flies, No. Z.—Dep. Agric. 

 New South Wales, Sydneij, Farmer's Bulletin no. 110, August 

 1916, 30 pp., 8 figs. [Received 6th November 1916.] 



This deals with further investigations subsequent to those previously 

 recorded [see this Review, Ser. B, iii, pp. 13-17, 184]. The breeding 

 and distribution of the Chalcid parasite, Nasonia brevicornis, was carried 

 out on a large scale, and it was found that few flies are likely to emerge 

 on carcases where these parasites are present. All flies captured near 

 the station were examined as to species, sex and number of eggs in the 

 female, and the results are tabulated as follows : — Pollenia stygia 

 {Calli'phora villosa), average about 260 eggs ; Anastellorhina augur 

 (C. Qceaniae), average 48 eggs ; Pycnosoma (C.) riififacies, about 200 ; 

 P. (0.) varipes, about 110 ; Lucilia sericata, about 200 ; Ojihyra nigra, 

 about 150. All the eggs in the ovaries of these flies appeared to have 

 reached the same stage of development and are all deposited at the 

 same time. Observations also tend to show that the same female, 

 either with or without pairing again, can continue to oviposit. Attempts 

 made to infect the flies with fungus and bacterial diseases were 

 disappointing. 



Lucilia sericala was noticed in fair numbers from November to 

 January and was bred from blown wool in October and November 1914, 

 and the first two months of the following year. P. rufifacies, which 

 was a very serious pest in New England in 1913 and 1914, was very 

 active from November to March and was also found in May, blowing 

 carcases and offal. Neocalliphora ochracea has never been found 

 breeding in carcases or live wool, and nothing is known of its life- 

 history ; it frequents shaded gullies and well timbered country. 

 Pollenia stygia occurred in swarms in September, and for two months 

 blankets had to be protected with mosquito nets. Wool was infested 

 with the maggots of this fly in October and November, and again in 

 the early months of 1915 and in August and September. A. augur, 

 though less abundant than the larger species, occurred almost through- 

 out the year, and was bred from blown live wool in October and 

 November and again in April. P. variptes was observed from November 

 to March and again in May, and seems to eat up the carcases it infests 

 more than other flies. Sheep infested with these maggots sufter much 

 more, and the area blown is much larger than in the case of attacks br- 

 other species, while the sheep so infested invariably appear to have been 

 attacked at the same time by other species, or else have not been 

 dressed after a previous attack. Hence this infestation seems to be 

 a case of secondary fly-blow. Ophyra nigra was always found in 

 putrid matter from October to the following March, and again about 

 the end of August. 



In order that the difterent species of flies blowing sheep could be 

 identified from examination of the maggots found in the wool and 



