1911] CynipidcB of California 365 



Synergus brevicornis A :hm. 



Synergus brevicornis, Ashmead, Tr. Am. Em . Soc . vol. 23 (1890), p. 189. 



"Female. Length 2.S-3 mm. Stature similar to 5. Iccviventris. 

 but the sculpture of the thorax is more rugose, the abdomen proportion- 

 ately shorter, the ventral valve projects slightly, and the antenna; reach 

 back only two-thirds the length of thorax. Vertex of head, thorax and 

 abdomen black; orbits, cheeks, face, antenna- and legs, brownish yellow, 

 the depth of color often varying; middle and posterior coxa? black, the 

 front pair often dusky basally, posterior femora often more or less 

 clouded; antennas 13-jointed, filiform, the 3rd joint one-third longer than 

 4th; face and mesopleura rather coarsely striated; scutellum rounded, 

 depressed at base with two distinct fovea?; the grooves of the mesonotum 

 rounded, almost obsolete by the coarse sculpture. Abdomen highly 

 polished, the second segment entirely hiding all the others and gaping 

 open at apex, in consequence the ventral valve projects, is brownish 

 and armed with a slight spine. Wings hyaline, pubescent, the veins 

 pale, the submarginal and marginal veins brownish apically; areolet 

 large, closed, the cubital cell only partially closed. 



" The male is but 1 .8 mm. long, with the head wholly, except stem- 

 maticum, and the legs, including coxa\ brownish yellow. The antenna? 

 are short, 15-jointed, the 3rd joint long, strongly excised, the apical 

 joint brown. 



' Habitat. Eldorado County, California." (W. H. Ashmead). 



I have not seen examples of this species. 



Synergus flavus Kieff. 

 Synergus flavus, Kieffer, Bull. Soc. Metz, ser. 2. vol. 11 (1904), p. 133. 

 Synergus ilavus, Kieffer, Invert. Pacif., vol. 1 (1904), p. 15. 



"Pale yellow or reddish yellow; head distinctly broader than the 

 thorax, without carina?; front and vertex smooth, face and cheeks paler 

 yellow. Antennae of the male 15-jointed, the two to three last joints 

 more dusky; second joint longer than thick; the third scarcely longer 

 than the fourth, faintly emargined outwardly; the fourth twice as long 

 as thick; the following ones gradually becoming shorter; the penultimate 

 joint is a little longer than thick, shorter than the last and all are very 

 slender; antenna? of the female 14-jointed, filiform and slender; the third 

 joint fully thrice as long as thick, the following gradually decreasing 

 in size, the penultimate only one-third longer than thick, shorter than 

 the last. Mesonotum finely coriaceous; mesopleura very finely longi- 

 tudinally striated; scutellum brownish red, rugose, the usual fovea? small, 

 not very distinct, separated by a small carina. Metanotum brown or 

 black-brown, the carina? parallel. Wings hyaline, veins brownish. 

 Tarsal claws simple. Petiole of abdomen black, coarsely longitudinally 

 striated; the second segment reaching to the apex of the abdomen, 

 smooth and not punctured. 



"Bred from galls of Callirkytis macuHpennis; the guests live in the 

 spongiose substance of the gall, outside of the cells, and do not hinder 

 the development of the gall makers. " (J- J. Kieffer). 



I have seen examples of this species, kindly furnished by- 

 Mr. Baker. 



