•^)H Rev. T. A. Marshall's MonograiyJi of 



rather stout, 14-jointed. Prothorax and pectus black ; metathorax 

 carinated in the middle, areated. Wings hyaline ; squaraulse 

 radicles, stigma and nervures, pale »brownish ; 1st section of the 

 cubital nervure faintly traced ; the nervure is more distinct beneath 

 the 1st cubital areolet. Legs brown, with the trochanters, base and 

 apex of femora and tibiae, and base of tarsi, testaceous. Abdomen 

 blackish, the two first sutures narrowly pale ; let segment linear, 

 without distinct tubercles. $ Similar ; antennae 16-jointed ; legs 

 darker, and 1st segment paler than in the 5- Length, \l ; exp. 2 

 lines. 



The specimens in the Bignell collection were bred out 

 of Aphis tanacetina. Walk., which infests Tanacetum 

 vulgarc, the tansy, Chrysanthevmm sinense, the common 

 garden chrysanthemum, and other plants. 



28. Aphidius matricarim, Haliday. 



A. matricariie, Hal., lib. cit., 103, $; Marsh., lib. cit., p. 



592,^?. 

 ? A. restridus, Nees, Mon., i, 22 ; Ratz., Ichn. d. Forst., iii, 



63, ?. 

 ? A. diminuens, Nees, Mon., i., 22, ^. 



$ Black ; abdomen piceous with the 1st segment ferruginous. 

 Palpi fuscous. Antennae filiform, 14-jointed, either entirely black, 

 or brownish at the base. Prothorax sometimes ferruginous. Wings 

 hyaline ; stigma brownish, very pale ; nervures Ijrown ; cubital 

 nervure complete as far as the end of the 1st cubital areolet. Legs 

 ferruginous, the fore pair streaked with fuscous above ; 4 posterior 

 ha\'ing their coxas, femora, tibiae in the middle, and tarsi at the apex,- 

 more or less infuscated. Abdomen lanceolate, rather wide in the 

 middle ; 1st segment almost linear, twice as long as broad, its tubercles 

 indistinct, situated in the middle, the colouris very clear, and extends 

 a little on to the 2nd segment, along the median line ; the following 

 segments black. Valves of the terebra obtuse. ^ Similar ; antennae 

 longer, 16-17-jointed ; legs darker ; abdomen forming a flattened oval, 

 spathulate ; 1st segment more slender. Length, f-1 ; exp. 1^-2^ 

 lines. 



Found rarely by Haliday on Pyrethriun inodorum and 

 P. maritinumi. The Bignell collection contains two pairs 

 of this species, produced from Aphis myosotidis, Koch, 

 which infests Folygonum aviculare, common knot-grass. 

 I have also obtained the $ from the pucerons of Raphanuis 

 maritimus, 



