70 SYNERGUS RADIATUS. 



Diplolepis gallse-pomiformis, Fonsc, Ann. Sc. Nat., xxvi, 1832, 



195, partim. 



Black ; the head except the front above, vertex, the antennae, and 

 legs rufo-testaceous ; the hinder coxae more or less black ; the abdomen 

 fuscous-p'iceous or obscure red or testaceous, never quite black ; wings 

 hyaline, the nervures pallid rufo-yellow ; the radial cellule longer than 

 broad, acute at the apex ; the basal abscissa of the radius curved, the 

 apical straight. Punctation on head and thorax moderately coarse, 

 transverse on the mesonotum ; mesopleurae longitudinally striolated ; 

 frontal laniinse distinct, not reaching to the hind ocelli; facial keel 

 indistinct. 



Length 1'5 — 2*5 mm. 



One of the commonest species. Common in the 

 galls of Biorhiza terminalis ; also in those of Andricus 

 curvator, A. albopunctata, A. solitaria, A. ramuli, Spa- 

 thegaster baccarum, 8. tricolor, Trigonaspis megaptera, 

 and on the Continent in those of Gynips glutinosa. It 

 appears in July. 



Sweden, Germany, Austria. 



12. SYNERGUS RADIATUS. 

 Synergus radiatus, Mayr, Verh. z.-b. Ges. Wien, xxii, 718, 20. 



Black ; the antennae and legs reddish-testaceous ; the coxae for the 

 greater part blackish ; vertex and front finely, in some examples 

 transversely, rugulose; mesonotum strongly coriaceous or rugulose, 

 sometimes transversely. Frontal laminae distinct. 



Length 1*5 — 2 - 5 mm. 



Closely allied to S. facialis, differing in having the 

 head black except at the oral region, the sculpture 

 much finer, and the coxse are for the greater part 

 black. 



Common in the galls of Spathegaster baccarum ; 

 also in those of Andricus albopunctata, A. curvator, A. 

 solitaria, and A. ramuli. Mr. Bignell has bred it from 

 A. glandulae. Widely distributed and common. Ap- 

 pears in June. 



Germany, Austria. 



