14 
C. F. H. Jenkins. 
more releases were made and in July, Twa<ldle (unpublished report 1933) 
\^Tites “ approximately 1,900 wasps have been released in the Derby District — 
Meda Station 1,300 ; Yeeda, 600 to date. On 16th June I released 500 wasps 
on Roebuck Plains Station, Rroome, on the cattle camp at Equire Well. 
Approximately 300 of tliis lot of parasites were bred at Derby, the remainder 
being obtained from Brock’s Creek during the month of May.” 
In July, 1933, Twaddle writes : — 
“ Owing to the difficulty of breeding buffalo dy jjupae at Derby for 
infection, the hirther release of these parasites is suspended for the time being.” 
Yo published iufonnatioii is available concerning the fate of Spalangia 
but Mr. Tw'addle informed me that when he left the district in 1935 there was 
no sign of the w^as^^ being active and that at no time had it given any signs of 
permanently establishing itself. 
LlTERATUllE. 
Handschin, E. 1932, Coim. Sci. hid. Mes, AusL Pamph. 31. 
F. CALLIPHORIDAE. 
(Blowflies) 
Three parasites have been tested in Western Australia for the purpose of 
controlling blowflies. In 1927 Newman obtained a consigmnent of 500 wasps 
{Alysici iiuiiiiluccitov PaiiK.) from Sir Oiiy !Mai‘.shalI, England, but none were 
reared for distribution. 
In 1929 Avith the assistance of Dr. Miller of tlie CaAvthron Institute an 
attempt was made to introduce specimens from New Zealand, but again without 
success. Experiments with a local wasp (Stenoterys Julvoventrolis Dodd), were 
conducted for a number of years (Newman and Andrewartha 1930) but although 
many thousands were artificially reared and distributed, no success was 
obtained . 
In 1915 Mornioniella vitripc-^inis Wile. = (d!^asonia hrevicornis Ashm,) 
was introduced from N.S.W. but without success (Newman 1915). 
literature. 
NeAvman, L. J. 1915, Ann. Keport Dept. Agric. W. Anst. 1914-15, (unpublished). 
Newman, L. J. 1928, “Sheep Maggot Fly Parasite,” Journ. Dept. Agric. If. Atist 
Ser. 2, Vol, V., p. 151. 
Newman, L. J. and Andrewartha 1930, “ Blowfly Parasite,” Journ. Dept. Agric. W. Aust 
Ser. 2, Vol. VIl, p. 89. 
Order. LEPIDOPTERA. 
F. PLUTELLIDAE. 
Plutella maculipennis Curtis. (Diamond-backed Cabbage Moth) 
It is not knowTi wlien this pest first gained a footing in Western Australia 
but it must have been amongst the first introductions as it appears in local 
literatures as far back as 1897 (Lea 1897). Unpublished records show that 
several attempts have been made to establish parasites and all available details 
are included in Table VI. 
