THE ENTOMOLOGIST. 



No. 145.] 



AUGUST, MDCCCLXXV. 



[Price Cd. 



Aphilotheix solitaeia. 



Descriptions of Oak-galls. Translated from Dr. G. L. Mayr's 

 ' Die Milteleiiropaischen Eichengallen' by Mrs. Hubert 

 Herkomer nee Weise. 



(Continued from p. 147.) 



29. Aphilothrix solitaria, Fonsc. 

 {C.ferruginea, Hart.). — This woody, 

 spindle-shaped gall is developed 

 either without a pedicle, or with a 

 short and thick one, on the axillary 

 buds of Quercus pubescens and 

 Q. sessiliflora. It is surrounded at 

 the base by small bud-scales, and 

 terminates in a style, which varies in 

 length, and is often curved at the 

 top : the blunt point of this style 

 generally bears a small papilla or 

 short cone. The gall is brown, and when fresh more or less 

 covered with a yellowish brown wool. In the interior of this 

 moderately thin, but hard gall, we find a large oval cavity, 

 which is the larva-cell. Its longest diameter is one centi- 

 metre. The fly emerges in September, for on the 28th of 

 that month I found on the oaks fresh galls of this species, 

 showing the hole through which the fly had emerged. — 

 G. L. Mayr. 



Three different species of Synergus are dwellers in the galls 

 of this species, namely, — S. facialis and S. radialus, which 

 emerge in July; and S. vulgaris, which lives in the gall 

 through the winter, not emerging till April of the next year. 

 From one hundred galls of this species, collected by Von 

 Schlechtendal, only four produced the gall-maker; the others 



VOL. VIII. 7. 



