KNOWLEDGE OF THE BRITISH BRACONID®. 959 
thirty different species of Lepidoptera. A gregarious parasite, 
generally of the larve of Tortricina or Tineina. This is the © 
Rogas linearis of Wesmael,* from whose description and that of 
Marshall + I have identified my specimens, not having seen the 
original description of Fabricus. Marshall describes four distinct 
varieties, and although the numerous broods that I have reared 
in the New Forest have all been typical, I have captured the 
var. pallipes. It is recorded that Van Vallenhoven bred this 
variety mixed with typical specimens from the same victim, 
which is quite contrary to my own experience, nor is it borne 
out by the many broods from the Fitch collection which I have 
examined. It has often been stated that the broods invariably 
consist of one sex only, and so I had always found them until 
July, 1914, when, from a larva of Tortrix ribeana, I obtained a 
brood composed of a single male and eighteen females ; the male 
appeared some thirty-six hours before any of the females. 
In some specimens I find that the striolation at the base of 
the third abdominal segment is very faint. As a rule, the second 
cubital areolet is open outwardly, that is, the second cubital 
nervure is obsolete. I have a specimen of the var. pallipes, 
however, which has the second cubital areolet distinctly closed. 
The cocoons are brown, thin, shining and enveloped in a 
thin whitish web; they are usually found in bunches between 
the leaves which have been “‘ rolled” by the hosts. A period of 
from three to four weeks elapses between the emergence of the 
parasite larve from their host and the appearance of the perfect 
insects. I have noticed that, after emerging from their host, the 
larvee feed as external parasites for two or three days; in fact, 
until the edible parts of the host are entirely consumed. 
Bred from Tortrix ribeana, June 28rd, 1911 (eight females), 
July 3rd, 1912 (twelve females), July 4th, 1912 (thirteen males) ; 
from T’. licheany (ten females); from T’. viridana, July 14th, 
1912 (six females); from Depressaria alstromeriella, July 10th, 
1912 (four females). Harwood has two specimens (var. pallipes) 
labelled ‘‘ex caja, W. Sherston.” In Fitch’s boxes are broods 
obtained by Elisha from Depressaria nanatella and Gelechia 
mouffetella (both broods var. pallipes) ; from Depressaria alstro- 
meriella ; Gracilaria elongella, July 14th, 1885; Cerostoma 
xylostella, July 31st, 1882, and Hbulea crocealis; also broods 
from Hnnychia octomaculalis, September 22nd, 1881, bred by 
W. AR. Jeffery ; and from Botys verticalis, bred by G. T. Porritt. + 
M. marginator, Nees. (Fig. 1.)—This is the enemy of the 
Sesidz, having been bred as a solitary parasite from the larve 
of many members of the family. It is the largest and stoutest 
* Nouv. Mém. Ac. Brux., p. 173. 
|} Trans. Entom. Soc. 1888, p. 193. 
;| Some of these broods were recorded by Fitch, Entom, xiv. 143, and 
xvi. 68. 
Yea 
