British Braconidse. 55* 



segments infuscated. Clypeus and palpi yellowish, the latter infus- 

 cated towards the tips. Antennae slender, entirely black, 15-jointed. 

 Anterior portion of the pectus yellowish. Wings hyaline ; squamulae 

 and radicles obscurely yellowish ; stigma impure yellow, becoming 

 brownish after death ; nervures brownish. Legs impure yellow ; 

 femora streaked above with fuscous, the hind pair almost wholly 

 fuscous ; 4 posterior tibiae infuscated except at the base ; tarsi almost 

 wholly infuscated ; 4 posterior coxae black. A yellowish patch on 

 the 2nd abdominal suture. $ Black, with the oral parts impure 

 yellow ; antennae 18-jointed ; legs brown, fore femora and tibiae 

 ferruginous beneath ; ends of the trochanters, and all the knees> 

 ferruginous ; abdomen brown, the 1st segment partly yellow ; 2nd 

 suture yellowish. (Haliday.) Length, 1^ ; exp. 2J lines. 



Parasite of the pucerons of Aster tripolium, sea star- 

 vv^ort. 



23. Aphidius ribis, Haliday. 



A. ribis, Hal., lib. cit., 101, $ ; cf Reaum., M^m., iii, 286 ; 

 Marsh., lib. cit., p. 587, $ $ . 



9 Blackish, or dark brown ; head black ; abdomen yellow at both 

 ends. Oral parts yellow. Antennae fuscous with the two basal 

 joints yellow, 15-jointed. Prothorax yellow ; pectus paler than the 

 disc of the thorax. Wings hyaline ; squamulae and radicles yellowish ; 

 stigma yellow, becoming brownish after death ; nervures pale 

 brownish, mostly subobsolete ; cubital nervure interrupted in the 

 middle, reappearing beneath the 1st cubital areolet and one half of 

 the 2nd, then suddenly effaced ; 1st cubital areolet indistinctly 

 separated from the discoidal. Legs yellow, including all the coxae ;. 

 tips of femora above, middle of tibiae, and tarsi at the apex, slightly 

 infuscated. Abdomen yellow ; base of the 2nd segment and ex- 

 tremity of the 3rd infuscated, as well as the disc of the following 

 segments except the apical one, which is yellow. Valves of the 

 terebra black. (J Antennae 15-16-jointed,as long as the body, stout, 

 black with the two basal joints pale ; prothorax blackish ; abdomen 

 after the 1st segment brown to the apex; otherwise like the ?. 

 Length, i-| ; exp. I5-2J lines. 



This small Aphidius is abundant, attacking Myzus ribis, 

 L., the aphis which infests currant-bushes, both red and 

 black, Ribis riibra and R. grossularia, causing the well- 

 known puckering of their leaves. The pucerons pierced 

 by the parasite become pearly white ; they produce the 



