64 SYNERGUS INCRASSATUS. 



B. Second abdominal segment, if punctured at all, only 

 on the upper side at the apex. 



3. Synergus apioalis. 

 PI. XII, fig. 2, ? . 



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



z.-b. Ges. Wien, xxii, 705 ; Thorns., 

 Opusc, 796, 7. 



— immarginatus, Htg., 1. c, 348. 



— erythrostomus, Htg., 1. c, 348. 



Black ; the oral region and the lower part of the face and cheeks and 

 legs pale rufo -testaceous ; the antennae testaceous at the base, the rest 

 infuscated ; the eoxae black, the basal half of the fore and the greater 

 part of the hind femora infuscated; the hind tibia3 slightly infuscated. 

 Second antennal joint longer than broad; frontal keels short, not 

 reaching to the ocelli. Front finely punctured ; mesonotum trans- 

 versely rugosely striolate ; the striae interrupted ; mesopleurae acutely 

 striolate; wings clear hyaline; the nervures pallid, testaceous to fuscous; 

 the radial cellule three times longer than broad. 



The (J has the head yellowish, with the vertex and front in the 

 middle black, sometimes with the face blackish ; the antennae have the 

 basal half yellow ; the legs are of a clearer yellow than in the $ ; the 

 coxae and femora more or less infuscated. 



Length 1 — 1*5 mm. 



One of the smallest species. Reared in June from 

 galls of Andricus noduli. Mayr reports it also from 

 the galls of Gynips lignicola, 0. conglomerata, G. am- 

 blycera, Andricus gemmae, and Neuroterus albipes ; but 

 he suggests that the specimens may actually have 

 issued from the twigs on which these galls were, rather 

 than that they really come from the galls of A. noduli. 



Rare. Clydesdale. 



Sweden, Germany, Austria. 



4. Synergus incrassatus. 



Synergus incrassatus, Htg., Germs. Zeits., ii, 707 ; Mayr, 

 Verh. z.-b. Ges. Wien, xxii, 707; 

 Thomson, Opusc. Ent., 793. 



Black; the antennae and legs rufo-testaceous ; the coxae and hind 

 femora more or less black, the anterior sometimes infuscated ; wings 



