British Braconide. 5 
the radial nervure near the base ; radial areolet acuminate ; radial 
nervure sinuated ; 2nd discoidal areolet completely closed. Legs 
testaceous; cox blackish; hind tibiz infuscated at the apex, 
their tarsi blackish. Abdomen somewhat narrower and longer 
than the thorax, oblong, depressed, contracted at the base, shining ; 
1st segment more than twice as long as its breadth, punctate- 
rugose, the tubercles obsolete ; 2nd striolate in the middle, smooth 
at the sides, somewhat narrowed towards the base; 3rd and 
following segments smooth, very shining. @Q unknown, Length, 
1% lines ; exp., 3 lines. 
This and the three preceding species are distinguished 
from the rest by the rugosity of the 2nd segment at its 
base. D. striatula much resembles sp. 4, but is smaller. 
According to Haliday it is rare in the north of Ireland: 
my only specimen was taken at Niton, in the I. of 
Wight. 
6. Ducnusa tristis, Nees. 
Alysia tristis, Nees, Mon.,i., p. 258, ¢ 3; D. tristis, 
Marsh., lib. cit., p. 467, ¢ 2. 
D. ampliator, Hal., Hym. Brit., ii., p. 8, ¢ 2 (nec 
Nees). 
¢@ Deep black, shining, with whitish pubescence ; palpi 
dusky. Head transverse, wider than the thorax. Antennz longer 
than the body, 25-jointed in the 9, 31-jointed inthe ¢. Furrows 
of the mesothorax merely inchoate, humeral ; mesonotum faintly 
impressed with a longitudinal channel terminating before the 
scutellum in an oval fovea, deep and elongate; furrow of the 
mesopleure crenulate ; metathorax very short, rounded, granulated 
and dull, somewhat densely covered with whitish pubescence. 
Wings ample, hyaline, sometimes with a lacteous tinge, some- 
times more cinereous ; squamule, nervures, and stigma black, this 
last elongate, rather stout, acuminate at the apex ; radial nervure 
slightly sinuated ; radial areolet longer than the prebrachial ; 
recurrent nervure interstitial; 2nd discoidal areolet not quite 
closed on the outer side. Fore legs brownish testaceous, their 
femora and tibize with a black streak above, or almost wholly 
blackish ; tarsi obscure ; 4 posterior legs black, with the 2nd joint 
of the trochanters and the base of the tibie dull testaceous. First 
abdominal segment obconic, twice as long as its apical width, 
narrowed at the base, margined, finely striolate, furnished with 
two carine, convergent and meeting before the hind margin, 
