272 Mv. F. Walker's Ahdmct of Dr. Mmjr's 



iiiiddle ; scutelluin witli two df'0]~» cavities at the base ; first 

 alxlominal segment ring-sliajied, with a forked longitudinal 

 streak ; the large segment consisting of two wholly united 

 segments. Kadial areolet fully closed. 



tiiiijholijtas. 



Face, prothorax, scutellum, and abdomen as in Sijncrgus. 

 Antennae 14-15-jointed in the male, lo-jointed in the 

 female ; third joint dilated in the male. Furrows of the 

 front very short. Eadial areolet open by the foreborder 

 which the radial vein does not reach. 



Ccroptres, 



Face only feebly streaked on the sides ; a straight keel 

 from each socket of the antennte to the border of the 

 mouth. AntenntB in the male 15-jointed, with the third 

 joint not dilated nor thickened ; in the female 12-jointed, 

 somewhat thickened towards the tips. Front without 

 furrows. Prothorax in the middle with two hindward 

 converging longitudinal furrows. Scutellum at the base 

 without any, or with two slight cavities. First abdominal 

 segment ring-shaped, smooth ; the large segment has a 

 transverse suture before the middle, and- thus forms two 

 segments, of which the first is more or less hairy. Eadial 

 areolet closed. 



SYNOPSIS OF THE SPECIES OF SYNERGUS. 



A. Second abdominal segment 1 )roadlY and fully punctured 

 on the whole hind border. Larva' in the galls during 

 winter. 

 a. Second joint of tlie antenna shorter than thick in 

 the male, as long as thick in the female. Head 

 luteous ; front and vertex black. Eye borders yel- 

 low, mclanopus. 

 h. Second joint of the antenme distinctly longer than 

 thick. 

 * Hind legs black : sutures and tarsi yellow. Face 



black, 

 ■j- Mesothorax roughly and transversely wrinkled, 



