Dec, I9I2.] Fullaway: California Gall-Fly Parasites. 275 



Head transverse, slightly wider than the thorax, rather thin anterior- 

 posteriorly, occiput completely margined, front broad between the eyes, which 

 are large and bulged, face broadening slightly below, cheeks extremely thin in 

 front, separated from face by a groove, broad behind eyes to occipital margin, 

 ocelli almost in a straight line, antennae inserted on the middle of the face, 

 ii-jointed (scape, pedicel, i ring-joint, 7 jointed funicle and undivided club), 

 joint measurement in mm. i .39, 2 .1, 4--10 .17-. 18, 11 .3. Thorax broad, convex, 

 pronotum fairly long, narrowing anteriorly, mesonotum a little longer than 

 scutellum, parapsidal grooves distinct, scutellum rhomboidal, divided beyond 

 the middle by a transverse line, metathorax and sides of scutellum anteriorly 

 sloping abruptly. Abdomen not quite so long as head and thorax together, 

 greatly compressed, elongate elliptical from above, hatchet-shaped from side, 

 the segments telescoping, the four first dorsally ridged with the posterior mar- 

 gins incised, ovipositor projecting from tip of dorsum and elevated, sheaths 

 clothed with short hairs. Legs stout and hairy, the hind coxae, femora and tibiae 

 especially broad and flat, the outer edge of the coxs quite sharp, femora faintly 

 serrate on lower margin. 



Brilliant metallic green with aeneous and purplish reflections, antennae 

 fuscous brown, almost black, eyes and mandibles red, legs outwardly from coxae 

 reddish brown, ovipositor sheath black. 



Wings hyaline, veins light brown, submarginal nearly a third longer than 

 the marginal, which reaches beyond the middle of the costal border, stigmal vein 

 undeveloped — a mere blob on the marginal, postmarginal vein also short, the 

 disc pubescent with quite evident hair lines. 



From Andricus quercus-californicus, Callirhytis querciis-pomi- 

 forniis and strawberry gall on Quercus dumosa and pimply gall on 

 Q. donglasi, from which no gall-flies were bred. 



Described from many specimens in Coll. L. S. J. U. (Lot 497, s. 8). 

 S. caerulea, new species. 



Length 4 mm., ovipositor 3.5 mm., expanse of wings 8 mm., greatest width 

 of fore-wing 1.5 mm. Head and thorax finely transversely rugose, with a short, 

 closely appressed whitish pubescence ; front of head, scutellum and mesonotum 

 posteriorly with an almost effaced umbilicate punctuation, face, cheeks and 

 anterior margin of the metathorax conspicuoulsy hairy, metathorax, abdomen 

 and mesopleura behind femoral furrow smooth and shining, the abdomen micro- 

 scopically reticulate. 



Head transverse, wider than thorax, rather thin anterior-posteriorly, occiput 

 completely margined, front broad between the eyes, which are large and bulged, 

 face also broad, cheeks extremely thin, ocelli arranged in an obtuse triangle, 

 antennae inserted on middle of face, ii-jointed (scape, pedicel, i ring-joint, 7 

 jointed funicle and undivided club), joint measurement in mm. i .47, 2 .11, 4 .2, 

 5 .18, 6-8 .16, 9 .15, 10 .13, II .27. Thorax broad, slightly convex, pronotum 

 short, parapsidal grooves distinct, scutellum more or less angulate and truncate 

 behind, divided by a transverse line just beyond the middle, behind which the 



