54 Rev, T. A. Marshall's Monograph of 



Tnoxys hcraclei, Hal. A. dissolutus, Nees, is stated by 

 that author to occur in hedges and oak-plantations ; 

 A. dissolutus, Haliday, is found, though rarely, in meadows 

 overgrown with Ranunculus acris. 



21, Aphidius sooichi, Marshall. 



A. sonchi, Marsh., lib. cit., p. 585, (^ $ . 



9 Black ; prothorax, base and apex of abdomen, clypeus, man- 

 dibles, and palpi, testaceous. Antennae slender, filiform, shorter 

 than the body, 16-jointed, the two basal joints and the l)ase of the 

 3rd testaceous. Mesothoracic furrows obsolete ; metathorax carin- 

 ated in the middle longitudinally, and crossed lower down by 

 another and transverse carina. Wings hyaline ; squamulae and 

 radicles testaceous ; stigma colourless ; nervures pale brownish ; all 

 obsolete beyond the stigma ; cubital nervure very weak at its origin, 

 but continued to the end of the first cubital areolet. Legs clear 

 testaceous, including the coxse. Abdomen lanceolate, as wide in the 

 middle as the thorax ; 1st segment nearly linear, tliree times as 

 long as broad, clear testaceous, its tubercles placed a little before 

 the middle ; 2nd brownish with a pale patch in the middle reaching 

 to the anterior margin ; 2nd suture bordered on both sides with 

 testaceous ; segments 3-4 brownish, the rest testaceous, sometimes 

 with a brownish spot in the disc of the 5th. Terebra very short, 

 with lilack, stout, obtuse valves. ,^ Antennae as long as the body, 

 18-jointed ; the testaceous portions of the body less clear ; 4 posterior 

 tibise and hind femora infuscated ; base of hind coxae marked with 

 a fuscous spot ; 1st abdominal segment brownish towards the ex- 

 tremity ; 2nd dark 1:)rown, leaving the sutures always pale ; after 

 the 2nd suture the abdomen is black. This ^ resembles so many 

 others that it can hardly be recognised apart from the other sex. 

 Length, Ij ; exp. 2i lines. 



Six specimens were reared by Bignell, and eight by 

 myself, from Sipfhonophm^a lactuciB, Kalt., the puceron of 

 Laduca saliva, lettuce ; but in the present instance this 

 aphis was found infesting Sonchus olcraceus, sow-thistle. 

 Hyperparasite, Allotria minuta, Hartig. 



22. Aphidius asteris, Haliday. 



A. asteris, Hal, lib. cit., 100; Marsh., lib. cit., p, 586v 



^ ?. 

 $ The colours are those of rosie (sp. 10), but not so clear. Head 

 and thorax black ; abdomen impure yellow, with the intermediate- 



