SYNERGUS ALBIPES. 67 



and by myself from D. longiventris and from galled 

 acorns, but these latter examples have the antennae 

 infuscated. On the Continent Mayr records it from 

 the galls of Gynips Hartigi, C. argentea, G. hungarica, 

 G. tinctoria, G. Kollari, G. lignicola, G. conglomerate 

 G. glutinosa, G. coriaria, G. polycera, G. caput-medusde, 

 G. calicis, Dryophanta folii, D. longiventris, D. divisa, 

 D. agama, D. disticha, D. cornifex. 

 Sweden, Germany, Austria. 



7. StNEEGUS ALBIPES. 



Synergus albipes, Htg., Germs. Zeits., iii, 349; Mayr, Verh. 

 z.-b. Ges. Wien, xxii,712. 

 — erythrocerus, Htg., 1. c, 349. 



Black ; the antennse and legs clear rufo-testaceous, often pure yellow ; 

 the coxae, the four anterior femora at the base, the posterior except at 

 base and apex, infuscated or blackish ; the wings hyaline, with lemon- 

 yellow nervures. Second antennal joint somewhat longer than broad ; 

 the third and fourth joints subequal. Front and mesonotum coria- 

 ceous, the latter sometimes finely transversely rugulose. Radial 

 cellule about two and a half times longer than wide. Petiole at apex 

 pyriform. 



The $ has the thickened third joint longer than the fourth. 



Length 1—2 <?, 1-5—2 mm. ? . 



It is difficult to find any very tangible points wherein 

 this species differs clearly from pallicornis. Generally 

 the sculpture is finer and closer, and the fourth 

 antennal joint is proportionately longer; moreover 

 the times of appearance are different, albipes issuing 

 in early summer from the same year's galls, pallicornis 

 from the second year's galls. 



I have it from the galls of Spathegaster baccarum, 

 8. tricolor, and Dryophanta divisa. Mayr records it 

 from Biorhiza synaspis, Andricus curvator, Dryophanta 

 agama, and D. disticha. 



Not uncommon. 



Germany, Austria. 



