SYNEKGUS TSOHEKI. 65 



hyaline, the nervures dark rufous; the radial cellule hardly twice 

 longer than broad. Front rugose. Mesonotum with stout, curved, 

 transverse striolations, between which the surface is smooth ; meso- 

 pleurae shining, longitudinally striated. Second antennal joint hardly 

 longer than broad ; the third about one fourth longer than the fourth. 

 Frontal laminae narrow, thinning towards the ocelli. Posterior part 

 of petiole broadly rounded from apex to base. Facial keel blunt. 



The $ has the third antennal joint curved, greatly thickened, espe- 

 cially at the apex, and twice the length of the fourth ; the second joint 

 broader than long ; the head, except the front and vertex in the centre, 

 is rufo-testaceous ; the coxae may be infuscated; the alar nervures are 

 darker. 



Length 2*5 — 3"5 mm. 



A distinct species, especially through the thickened 

 antennae in both sexes and the round petiole. 



Common. Found only on root galls; namely, on 

 those of Andricus radicis, A. corticis, and A. Sieboldii. 



In size it varies considerably, as it does also in the 

 depth of the sculpture ; while in colour I have seen 

 specimens with the head and thorax dull brownish, 

 and the abdomen reddish. 



Sweden, Grermany, Austria. 



5. Stneegus Tsoheki. 

 PI. XII, fig. 6. 



Synergus TscheM, Mayr, Verh. z.-b. Ges. Wien, xxii, 708. 



Black ; the antennas and legs rufo-testaceous ; the base of the 

 antennae, the coxae, the four anterior femora broadly at the base, the 

 posterior almost entirely, and the greater part of the hinder tibia? 

 fuscous or fuscous-black ; the wings hyaline, the nervures fuscous to 

 testaceous. Front and mesonotum coriaceous, alutaceous, the latter 

 sometimes transversely rugulose in the middle. The second antennal 

 joint in the $ is a little longer than broad ; in the $ as long as broad ; 

 in the <$ the curved and thickened third joint is somewhat longer than 

 the fourth. The radial cellule a little more than twice longer than 

 broad. Apical half of petiole sometimes aciculate, especially in the 

 larger specimens. 



Length 2 — 2*5 mm. 



The coloration of the antennas and legs varies, 

 especially as regards the quantity of the fuscous 

 colour, but the base of the antennas is never yellow. 

 A specimen reared from the galls of Dryophanta 



VOL. iv. 5 



