56 Rev. T. A. Marshall's Monograph of 



hyperparasite, AUotria minuta, Hartig, in such numbers 

 that it is often difficult to procure from them a single 

 Aphid ius. 



24. Aphidius cirsii, Haliday. 



A. cirsii, Hal., lib. cit., 101, $ (not of Curtis) ; Marsh., lib. 

 ciL, p. 588, ?. 



$ Pro thorax flavo-ferruginous ; head and thorax Idack or blackish ; 

 abdomen piceous, almost black at the apex, with the 1st segment 

 and two first sutures yellow. Face and clypeus black ; palpi 

 fuscous ; mandibles yellow, infuscated at the points. Antennae 15- 

 jointed (rarely with 16, and once only with 17 joints, according to 

 Haliday), shorter than the body, the apical joint largest ; they are 

 black, with the two basal joints brownish, the 3rd testaceous, black 

 at the extremity. Mesothoracic furrows obsolete ; metathorax carin- 

 ated, areated. Wings hyaline, with a dusky tinge ; squamulse and 

 radicles testaceous ; stigma very pale ; nervures fine but distinct, 

 pale brownish ; cubital complete as far as the end of the 1st cubital 

 areolet. Legs rufotestaceous, coxae and trochanters paler ; hind coxse 

 infumated above at the base ; femora and tibiaj of the same pair 

 usually of a deeper red. Abdomen lanceolate, slender, narrower 

 than the thorax ; 1st segment rufotestaceous, slightly widened pos- 

 teriorly, 2^ times as long as its mean breadth, without distinct 

 tubercles ; the two first sutures and the posterior half of the 2nd 

 segment pale ; the following segments black. Valves of the terebra 

 black. $ Unknown. Length, | ; exp. 1|. 



Bignell has reared six females of this species. One 

 came out of Aphis cardui, L., infesting Carduus lanccolatus, 

 Pyrethriim maritiiiuim, and some other plants. Buckton 

 remarks that this Aphis is subject to the attacks of a 

 parasite, probably of the present species. On a single 

 stalk of Pyrtthrurti, an inch and a half long, he counted 

 19 parasitised pucerons. Three more of cirsii were pro- 

 duced from Aphis tanacctina, Walk., infesting a geranium, 

 and two from an undetermined puceron found on Galiutn 

 verum, ladies' bed-straw. Haliday procured his specimens 

 from Cirsium arvense, creeping thistle, but not by breeding. 



25. Aphidius eglanteri^, Haliday. 

 A. eglanteriai, Hal, lib. cit., 102; Marsh., lib. cit., p. 589, 



^ ?. 

 9 Black ; prothorax sometimes ferruginous ; base of abdomen 

 yellow. Oral parts and palpi brownish. Antennae black, 14-15- 



