DEY0PHANTA LONGIVENTB1S. 125 



pi. ii, fig. 15 ; Mayr, Europ. Cyn., 

 36. 

 Sjoathegaster similis, Adler, Zeits. wiss. Zool., xxxv, 190, pi. xi, 

 fig. 15 a; Licht., Cyn., 52, pi. ii. fig. 15 a ; 

 Mayr, Europ. Cyn., 35. 



The only tangible points in which, this species 

 differs from folii are that the twelfth antennal joint is 

 perceptibly longer than broad and that the femora are 

 brownish. 



The sexual form cannot be separated. 



Gall (agamic). — Found in August, becoming ripe in 

 October, when the flies leave them. They are situated 

 on the nervures (the central or lateral) somewhat irre- 

 gular in shape, hard and woody, about 7 to 8 mm. long, 

 and about 4 to 5 mm. in height; the surface rough, 

 gibbous, the gibbosities and the general surface whitish- 

 yellow, marked frequently with reddish bands; the red 

 forming continuous bands or irregular spots. The 

 central cavity small, the walls being thick. The apex 

 is not depressed. 



The inquiline is 8. pallicornis, and, according to 

 Brischke, 8. apicalis. Parasites : Syntomaspis cyanea, 

 8. lazulina, Torymus dbdominalis, T. regius, Eurytoma 

 rosse. Brischke gives Callimome longiventris, Kalten- 

 bach Entedon cyniphidium, and Ratzeburg Elachestus 

 ajniphidium as parasites. 



Gall (sexual). — Found on the adventitious buds on 

 old oaks, sometimes also from those issuing from the 

 bark, and also from the small twigs. Length about 

 2 mm. ; ovoid, pointed at the apex, green, velvety, 

 covered with long whitish hairs, which are sometimes 

 so numerous as to give the gall a whitish appearance. 



It is found in May or at the end of April, the flies 

 coming out early in May as a rule. 



Distribution : common. 



Germany, Austria, Switzerland. 



