126 DRYOrHANTA AGAMA. 



3. DRYOPHANTA AGAMA. 



PI. II, fig. 2. 



Cynips agama, Htg., Germs. Zeits., ii, 188. 



Dryophanta agama, Mayr, Europ. Cyn., 36 ; Eichengallen, 37. 



The abdomen is formed as in foli and longiventris, with which it 

 agrees closely in coloration of the body ; but the legs are yellowish- 

 red with only the coxae at base blackish ; the antennas are brownish- 

 black, sometimes yellowish-red at the base, and the mesonotum has 

 the hinder part in the centre very smooth and shining and almost 

 glabrous ; the fore part of the mesonotum too not being so thickly 

 haired as in folii. It is also a smaller species. The twelfth antennal 

 joint is distinctly longer than broad, as in longiventris. 



Length 3 mm. 



The sexual form is unknown, but we have no 

 definite evidence that it may not have a spring form. 



Gall. — Length averaging 4 mm., oval or ovoid ; the 

 colour pale yellowish, seldom or never with red or 

 pink on the sides ; the surface marked with asperities ; 

 the central hollow large, the shell being thin ; found 

 on the underside of the leaves, on the veins, in July 

 and August. 



Easily known from the galls of divisa by being 

 smaller, more globular, and by the large central 

 cavity. 



The inquilines are Synergus pallicornis and 8. albijpes, 

 and, according to Brischke, S. ajpicalis. Parasites : 

 Syntomaspis cyanea ; S. eurynotus, Foer. (Griraud) ; 

 Torymus pubescens, Foer. ; T. regius, Eurytoma signata 

 (Kaltenbach) ; Eupelmus urozonus, Pteromalus fascicu- 

 latus, Foer. ; P. fuscipalpis, Foer. Brischke records 

 Torymus cultriventus, Ratz. (Mayr gives as the host 

 of this species Harmomyia Fagi), T. abdominalis, Deca- 

 toma biguttata, and Eurytoma rosas. 



Not common, and local. 



Germany, Austria. 



