76 THE ENTOMOLOGIST. 



projections varies from half to one centimetre. The gall is 

 hard, brown, and not ghilinous. It is chiefly remarkable in 

 the section which exhibits many egg-shaped cells, in which 

 the larvae of the gall-flies live; these cells or inner galls are 

 surrounded by the moderately hard, brown, gall-substance. 

 It is found on Quercus pubescens, rarely on Q. sessiliflora, 

 and is full grown in the autumn, but does not fall ; therefore 

 two-year old galls perforated with holes are often met with on 

 the oaks, Herr von Haimhoffen, who has both described and 

 figured this species in the ' Verhandlungen der Zoologisch- 

 botanischen Gesellschaft,' 1867, page 527, states that 

 when kept in a warm room the imagos emerged from 

 December to the end of February, but those kept out of 

 doors did not appear till the end of spring. From a gall 

 which I collected on the 8th November, 1869, the first 

 imago emerged on the 18th of the same month, and was 

 followed by others during the next few days. — G. L. Mayr. 



Three species of Synergus, viz. Melanopus, Pallidipennis, 

 and Pallicornis, occur in the galls of this species; and 

 Megastigmus dorsalis is parasitic on the Cynips larva. — 

 E. A. Fitch. 



Life-histories of Sawfiies. Translated from the Dutch of 

 Dr. S. C. Snellen van Vollenhoven by J. W. May, Esq. 



(Continued from p. 52.) 



Nematus appendiculatus, Hart. 



Imago : Hartig, Blaii-und-Holzwespen, p. 202, No. 34. 



Larva undescribed. 



Nematus niger, subnitidus, clypeo et pedibus pallide 

 ochraceis, antennis subtus et alarum stigmate fusces- 

 centibus. 



I had from time to time seen on red-currant bushes a small 

 green tenthredinous larva, which evidently belonged to a 

 species of Nematus, but I had not taken any particular 

 interest in the matter. The smallness of the larva, its green 

 colour, the probability that it would only produce a yellow 

 and black Nematus, whose number seems to be legion, the 

 absence of anything remarkable in its habit and mode of 



