128 DRYOPHANTA DISTICHA. 



corded by Giraud; Pteromalus Saxesenii, E,atz., by 

 Ratzeburg ; Torymus pubescens, Foer. ; Eurytoma sig- 

 nata, Nees ; Eupelmus urozonus, Dim. ; Pteromalus 

 fasciculatus, Foer., by Kaltenbach ; Eurytoma squama, 

 Wlk. ? ; Decatoma biguttata, Swed. ? by Fitch (Bnt., ix, 

 150). 



The galls frequently occur in enormous quantities, 

 covering and bending down the leaves. The speci- 

 mens frequented by Synergi are often very minute. 



Gall (sexual). — Found early in May when the leaves 

 are beginning to expand, and generally on the ter- 

 minal buds. They are usually on the young leaves, 

 issuing from the mid-rib, or from the edge, the leaf 

 being considerably distorted thereby ; they may be also 

 found in the buds. They are about 4 mm. in length, 

 rounded at base and apex, the apex, if anything, being 

 slightly narrower than the base. The shell is very 

 thin, the colour greenish or greenish-yellow, when 

 young sometimes marked with red ; the texture granu- 

 lar, without any pubescence, but covered with minute 

 liquid-bearing vesicles. 



Common. 



Germany, Austria, Switzerland. 



5. Deyophanta disticha. 

 PI. II, fig. 3. 



Cynips disticha, Htg., Germs. Zeits., ii, 188 ; Schenck, Nass. 



Cyn., 58. 

 Aphilothrix disticha, Mayr, Eichengallen, 38, pi. v, fig. 53. 

 Andricus disticha, Mayr, Eur. Oyn., 37. 

 A species not easily separated from divisa, but normally sized 

 examples may usually be known by the mesonotum in front being less 

 .strongly pilose and smoother; the mesopleurse bear punctures and with 

 a large, smooth, and bare spot in the middle. 



Gall. — Semicircular at the top, a little longer than 

 wide, and nearly as high as it is long ; pale yellow, 

 smooth; at bottom narrowed towards the centre 



