Dec, I9I2.] FuLLAWAY: CALIFORNIA GaLL-FlY PARASITES. 279 



mesosternum, scutellum, metanotum, abdomen dorsally and laterally beyond the 

 middle, all the femora and tibiae outwardly, middle and hind tibiae almost entirely 

 black. Eyes brown. Antennae fuscous, the scape and pedicel golden brown, 

 black above. Ocelli red. Wings hyaline, slightly iridescent, marginal vein 

 short, stigmated, a brown gourd-shaped cloud extending across the middle of 

 the wing two thirds its width, the short capitate stigma projecting from the 

 outer side of the neck. 



From twig swelling on Qucrcns chrysolepis from which no gall- 

 flies were bred. 



Described from two specimens in Coll. L. S. J. U. (Lot 509 s. 11). 



A single male specimen corresponding closely in structure was 

 bred from the gall of Disholcaspis eldoradensis collected in the vicin- 

 ity of Stanford University. The following slight differences are 

 noted : 



Slender, greatest width of fore-wing .y6 mm. Antennae 8-jointed 

 (only 4 joints in funicle), the club slightly enlarged, metanotum more 

 or less flat, abdomen not compressed ovate dorsal margin (from 

 side) semicircular, ventral margin straight, 3d segment occupying 

 half the abdomen, 4th and 5th rather inconspicuous; hairy, black on 

 head beyond ocelli, on to face, and on vertex beyond eyes, thorax 

 also black except lateral angles of pronotum and narrow strip in 

 front, and mesopleura. 



D. doanei, new species. 



Female. — Length 2.75 mm., expanse of wings 4.25 mm., greatest width of 

 fore-wing .90 mm. Head and thorax umbilicately punctate, rather thickly clothed 

 with silvery pubescence, which is longer on mesosternum and laterally on meta- 

 thorax; mesopleura faintly shagreened in front, aciculate behind, petiole only 

 faintly rugose ; abdomen smooth and shining, with a few sparse hairs. Head 

 triangular (when viewed from in front), slightly wider than the thorax, trans- 

 verse and fairly thick anterior-posteriorly, eyes small, front between wide, 

 ocelli arranged in an obtuse triangle, antennae inserted on level with lower 

 margin of eyes, antennal groove broad and nearly reaching lower ocellus, 

 antennae g-jointed (one ring-joint and an undivided club). Thorax convex, 

 almost tuberculate, pronotum as long as mesonotum, parapsidal grooves present 

 but indistinct, scutellum rounded posteriorly and very convex, metanotum more 

 or less flat, with a shallow fovea medially at the base smooth and shining. 

 Abdomen compressed, elliptical from above, semicircular from side, the ventral 

 line straight, petiole fairly long and broad, 7 segments visible, 3 and 4 wide, 

 much wider than any of the others, ventral valve slightly protruding. Legs 

 pubescent, hind tibiae very thickly clothed with hairs and with a row of stiff 

 bristles on posterior face, hind coxae and femora very much swollen. 



