9 THE ENTOMOLOGIST. 
quite halfway up the face. Cheeks bare, jowls narrow, about one 
sixth the height of eye. Palpi stout and black. Antenne very long, 
third joint quite four times the length of second, arista bare, distinctly 
thickened to about the middle, second joint not much lengthened. 
Scutellum blackish grey, terminal bristles crossed and not erect, 
though slightly upturned. Abdomen ovate, with discal and marginal 
macrochete. Hind tibie with unequal bristles, ungues microscopi- 
cally pubescent, nearly as long as last tarsal joint (male), much shorter 
(female). Wings with first posterior cell open, ending just before 
wing tip, angle of cubital vein slightly rounded and without an 
appendix, radial vein bristly at base only. Length 4-6 mm. 
Zenillia (Myxexorista) roseane was described by Brauer & 
Bergenstamm in Denkschr. Akad. Wien lviii. (1891) p. 8382. It 
was known to them in the female sex only, the specimens having 
been bred from Tortriz roseana, Hw., and no one appears to have 
recognised the species since. 
Mr. Adkin has also reared another parasitic dipteron from 
Tortriz pronubana which appeared with the above ; this second 
species is Nemorilla maculosa, Mg., which is reported as having 
been bred on the Continent from Acrobasis consociella, Hb., 
Cacecia murinana, Hb., Psecadia bipunctella, F., Rhodophea 
suavella, Zk., Sylepta ruralis, Scop., and Pyralis sp. 
Newmarket: December, 1908. 
The first traces of the parasite referred to above were seen 
in June last, when, in the cage in which I was keeping the pupe 
of Tortrix pronubana, I found several dipterons not unlike small 
houseflies in general appearance. Upon closer investigation I 
found among the leaves in which the Y’ortrix had pupated the 
puparia from which the dipterons had emerged. In the autumn 
[ again collected wild larve of 7’. pronubana, which in due course 
pupated, and the dipterons again began to appear. I therefore 
made a careful examination of the pupal webs, and in many 
cases found a dipterous puparium in the web alongside the 
lepidopterous pupa; in every case the pupa had been fully 
formed before the parasitic larva emerged from it. The number 
of pupe infested I should estimate at fully twenty per cent. 
Tortrix roseana, the species from which Bergenstamm reared 
the original specimens of Zenillia roseane, occurs in the same 
gardens where 7’. pronubana is found, and is also pretty generally 
distributed throughout the surrounding country; it is therefore 
quite likely that the dipteron may ali along have infested that © 
species, but been overlooked, and that having found a more 
suitable host in the double-brooded J’. pronubana, has been able 
to multiply more rapidly, and even become a serious menace to 
its existence; yet it should be noted that larve of Tortrix podana 
and Batodes angustiorana, taken in some numbers at the same 
time and place as the spring larve of J’. pronubana, showed no 
signs of the parasite.-—Roperr ADKIN. 
