44 RHODITES NERVOSUS. 



fuscous or brownish; abdomen yellowish-red, the hypopygium brownish- 

 black ; wings pale fuscous, the nervures brownish, shining ; the meso- 

 notum closely aciculate ; the parapsidal furrows distinct, and there is 

 a short furrow between them at the base ; scutellum finely rugose, 

 irregularly keeled, projecting at the base between the foveaa. The 

 third antennal joint hardly one-fourth longer than the fourth. $ . 

 Length 3 to 35 mm. 



The cubitus is usually present, but may be very 

 faint; the keels on the scutellum are not so well 

 developed in the smaller as in the larger examples ; 

 the quantity of yellow on the four anterior legs varies, 

 and some specimens have the wings more deeply 

 suffused than others. 



The c? I have never seen, nor has it been described 

 by any author. 



Gall. — Irregularly pea-shaped, bearing five or less 

 stout, sharp-pointed spines, smaller, as long, or longer 

 than the gall itself; smooth, sometimes bearing small 

 warts ; green, spotted with red when old, and becom- 

 ing brownish when they fall from the leaf. In dia- 

 meter they vary from 4 to 6 mm. ; they are unicellular, 

 the cell large, the bounding wall being about 1 mm. in 

 thickness. The gall is attached by a narrow point to 

 the leaf -vein on the under side, the mark of attach- 

 ment not being visible on the upper side of the leaf. 

 It is found in July, and falls to the ground when ripe. 



When attacked by Periclistus caninss, the galls are 

 larger, more irregular, usually paler, and are poly- 

 thalamous, as in Bhodites eglanterise. The parasites 

 are Torymus macropterus, Pteromalus eminens, Foer., 

 P. inflexus, Foer., Tetrastichus obtusatus, Gir. 



The galls have been recorded from Rosa canina, B. 

 arvensis, B. rubiginosa, and B. causacica. I believe I 

 once found them on B. eglanteria. 



I think there is no doubt about this being nervosus. 

 Ourtis's description is as follows : " Black, shining, 

 obscurely punctured, and slightly pubescent ; antennae 

 14-jointed, as long as the body, two basal joints 

 brownish ; ocelli very large ; post-scutellum rugose, 

 with three parallel ridges ; abdomen very smooth and 



