22 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 61. 



Carpinteria. Santa Barbara, Paso Robles, Paraiso Springs, Palo 

 Alto, hills back of Berkeley, and St. Helena. They were noted on 

 4^. wisUzeivi at Los Gatos, Mount Tamalpais. St. Helena, and Bagby. 

 All localities in California. 



CALLIRHYTIS BALANASPIS, new species. 



Plate 4. fig. 14. 



Female. — Pale reddish-brown, becoming yellowish below, abdomen 

 darker red and almost black dorsally, propodeum, metathorax, at 

 least hind tarsi and tibiae, eyes and ocelli black. Head as broad as 

 thorax, seen from in front widest above antennae, facial line .65 

 transfacial, interocnlar area 1.47 times as broad as high, antennocu- 

 lar space equal to ocellocular, malar space .5 eye and with groove, 

 greatly broadened behind eyes, thickness .34 width, mandibles 

 2-toothed, palpi 5- and 8-segmented. antennae 14-segmented, third 

 longest, fourth .83 third, fifth .7 third, shorter to thirteenth, last one 

 and one-half times preceding and infuscated, frons coriaceous and 

 bare, rest of head pubescent. Pronotum with narrow median bare 

 area. Thorax closely pubescent as in Dkholcaspis hiding sculpture. 

 Mesoscutum in balsam broader than long, finely rugose, parapsidal 

 grooves percurrent, their separation behind greater than that of 

 parallel lines, no trace of median. Scutellum rugose with two large 

 smootli pits at base. Carinae on propodeum outwardly bent, in- 

 closing a rugose area much wider than high. Mesopleurae aciculate. 

 Hind tarsus shorter than tibia, second shorter than fifth, claws sira- 

 l^le. AVings hyaline, veins pale except subcosta and both cross-veins, 

 aerolet large, reaching one-sixth way to basal, surface short pubes- 

 cent, ciliate only on hind margin of hind wing. Abdomen longer 

 than broad, compressed, second tergite occupying .7 and with sparse 

 pubescent patches at base, its hind margin and exposed parts of rest 

 microscopically punctate and the hind margin of the third tergite 

 at least with parallel shallow-longitudinal indentations, ventral spine 

 three times as long as broad, ovipositor when dissected out longer 

 than antenna. Using width of head as a base the length of mesono- 

 tum ratio is 1.26, antenna about 2.5, ovipositor 2.9, wing 2.7. 



Length of 3 pinned specimens 3.9-4.1 mm. 



Ti/pe.—Csit. No. 22911, TJ.S.N.M. Two cotypes. 



Host. — Qvercus marilandica Muenchhausen. 



Gall. — Produced in the fall in October on immature acorns which 

 are about 6 mm. in diameter, the size being characteristically larger 

 than the normal young acorns. It is deeply embedded in the acorn 

 cup beside the acorn, less than half of the gall protruding, and 

 serretes honeydew at apex while growing. When detached the gall 



