366 Annals Entomological Society of America [Vol. IV, 



Synergus dimorphus O.-S. 



Svnergus dimorphus, Osten-Sacken, Proc. Ent. Soc. Philad., vol. 4 (1865), 

 p. 376. 



Synergus dimorphus, Gillette, Tr. Am. Ent. Soc, vol. 23 (1896), p. 86. 87. 



Female. Black, antennae, ocelli, face on anterior margin, mandibles 

 basally, gena; and orbital margins, tegular, legs (except coxa?) and 

 ovipositor sheath yellowish brown, tips of antennas and tarsi fuscous. 

 Head faintly reticulate, face radiately striate, antenna; 14-segmented, 

 1st segment stout, 2nd slender and oval, 3rd longest, slightly longer 

 than either 4 and 5, following segments progressively shorter, except 

 the last, which is somewhat longer than penultimate. Pronotum wide 

 in the middle, rugose, mesonotum transversely wrinkled (some speci- 

 mens without transverse folds, rugose), parapsidal grooves incomplete, 

 extending less than half-way to anterior margin, median longitudinal 

 lines not reaching the middle, smooth lines over base of wings distinct, 

 mesopleura transversely aciculatc, with a triangular smooth patch 

 beneath wing, scutcllum deeply rugose, fovea? indistinct, small, oval and 

 approximate, separated by a median carina; pronotum, mesonotum and 

 scutellum sparsely covered with silvery pubescence. Abdomen smooth 

 and shining, vertical and horizontal dimensions almost equal, tergal line 

 from the side almost straight, sternal line semicircular, 2nd tergite 

 wholly obscuring the following segments, posterior margin faintly 

 punctate. Wings hyaline, pubescent, radial, subcostal, basal and 2nd 

 transverse veins black, heavy, others faint, radial cell short, closed, vein 

 at base slightly arcuate, areolet indistinct, cubitus not reaching basal 

 vein. Length 2.25-2.5 mms. 



Male. Black, tips of mandibles, palpi, antenna? (except distally 

 infuscated basal segments), legs (except trochanters and coxa-), ventral 

 margin of abdomen and a transverse basal band brown. Head rugose 

 and finely reticulate, antennce 15-segmented, reaching middle of abdo- 

 men, 3rd and 4th segments subequal, 3rd longer than 1 and 2 together, 

 incised at base, following segments progressively shorter to last. Thorax 

 coarsely rugose, mesonotum transversely wrinkled, parapsidal gr< • 

 complete and deeply impressed, median longitudinal lines distinct, 

 posterior margin of abdomen punctate. Wings hyaline, pubescent, 

 areolet distinct, cubitus nearly reaching basal vein. Length 3.5 mm. 



Bred from galls of Cynips mttlli punctata on Quercus lobata. 



Habitat. Stevens Creek Canyon, above Cupertino, Cal. 

 (R. W. Patterson.) 



Synergus oneratus oneratus (W. Harr.) 



nips oneratus, T. \V. Harris, Treat. Ins. X. Eng. (1842), p. 398. 



Svnergus oneratus, B. D. Walsh, Proc. Ent. Soc. Philad., vol. 2 (1864), p. 

 488, 498. 



Synergus oneratus oneratus, I >alla Torre and Kieffer, Das Tierreich, lief. 

 24 Cynipidae (1910). p. 632. 



Female. Yellowish brown, legs and face light yellowish brown, 

 eyes, ocelli, tips of mandibles, presternum, pecten, mesopleura beneath, 

 metathorax apically and hind tarsi black; pubescent. Head faintly 



