CONTRIBUTIONS TO OUR KNOWLEDGE OF BRITISH BRACONIDA. 271 
gnawing through in order to emerge, so that in an empty cocoon 
the ridge is not noticeable. A solitary parasite, it is on the 
wing from April to October; of the last generation in the year 
some emerge in October, but the majority pass the winter within 
their cocoons. 
I have obtained it very frequently from both the summer and 
autumn broods of the larve of Cabera pusaria, and have also 
bred it from Cidaria corylata, February 2nd, 1912, and March Ist, 
1912 (forced), Semiothisa liturata, June 10th, 1913, Hybernia 
marginaria, Jane 11th, 1911; Oporabia dilutata, May 30th, 1911, 
etc., and Metrocampa margaritaria, October 10th, 1911. 
Immunis, Hal.* 
This species seems to have been somewhat confused with 
others. Haliday’s description of the female, given below, is, 
however, very clear : 
« Thorace levi: femoribus tibiisque flavo-testaceis ; posterioribus 
illorum utrinque, harum apice, fuscis; alis hyalinis ; aculeo brevis- 
simo. 
M. glomerato equalis; antenns longiores; palpi fusci, apice 
pallide; pedes flavo-testacei, coxis et trochanterum basi nigris; 
femora antica summa, basi, intermedia lineola supera et alia infera 
fuscis ; postica fusca plaga longitudinali testaced ; tibiz postice et 
tarsi posteriores apice fuscescentia; ale hyaline stigmate costaque 
piceis; thorax levis nitidus; segmentum 1™™ quam M. glomerato 
brevius scuto lateribus subrotundato medio latiore, subtilits aciculato ; 
gdum arcuato-impressum medio subtilissimé aciculatum ; aculeus 
subexertus.”’ 
The species is variable in colour, sometimes not only the 
sides of the first and second abdominal segments being testaceous 
but also the greater part of the third and fourth also. The 
metathorax is almost smooth and the terebra slightly surpasses 
the extremity of the abdomen. ; 
A solitary parasite; cocoon pale lemon colour. Bred from 
Hybernia marginaria, June 21st, 1911, and June 26th, 1915; 
Hs oe June 21st, 1915, and Thecla quercus, June 23rd, 
1908- 
Cabere, Marsh.+ 
As Marshall remarks, this is very near immunis, and I rather 
doubt if itis really distinct. The only difference brought forward 
seems to be in the enclosed space on the second segment of the 
abdomen, which in cabere is smooth, in immunis is aciculate. 
Marshall describes the cocoon as ‘‘ brownish-white”’; this is 
correct with cocoons which have been kept on damp sand, etc., 
through the winter, but when newly-made they are pale lemon 
colour, similar to those of immunis. In Marshall’s collection in 
* «Ent. Mag.,’ ii, 250. 
+ ‘Trans. Entom. Soc.,’ 1885, p. 213. 
