12 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. «1. 



antennociilar and ocellocular spaces equal, palpi 5- and 3-segmented, 

 antennae 13-segniented with lengths of first five as 23 : 9 : 18 : 14 : 14, 

 6-12 gradually shorter, last 2.5 times preceding and sometimes incom- 

 pletely divided or 14-segmented with last not twice preceding which 

 is as broad as long. Sides of pronotum rugose. Mesoscutum 

 broader than long, with slightly transverse ridges on a coriaceous 

 but not shining background, the rugose sculpture more pronounced 

 posteriorly, parapsidai grooves percurruent, broader behind where 

 their separation is slightly less than that of anterior lines, fine lines 

 over base of wings, slightly infustated posteriorly. Scutellum more 

 coarsely rugose, trans^ erse groove at base with about 15 longitudinal 

 ridges, the median scarcely more prominent and not making two 

 foveae. Carinae on propodeum almost straight and parallel, the area 

 between rugose with one or two longitudinal ridges. Mesopleura 

 coriaceous, lower third shining. Wing hyaline with slight cloud in 

 costal cell near hinge, first and second cross-veins heaviest and 

 slightly clouded, first abscissa of radius rounded, second pale and not 

 reaching margin, areolet reaching one-fourth and cubitus all way to 

 basal, surface very short pubescent, 

 margin not ciliate. Hind tarsus shorter 

 than tibia, second and fifth equal, claws 

 simple. Abdomen longer than broad, 

 second tergite occupying .53 length, its 

 hind margin and exposed parts of 

 others microscopically coriaceous, hy- 

 Fio. 2.-CALURHYTIS MiLLEKi, NEW popyglum lu balsam almost as long 

 SPECIES. Cells in acorns of as width of head, ventral spine not pro- 



AGRIFOLIA. XI. . ^. ill 11- 



]ectmg, ventral valves oblique, ovipos- 

 itor when dissected out over twice as long as antennae, ovarian eggs 

 well developed. Using width of head as a base, the length of meso- 

 notum ratio is 1.2, antenna 1.6-1.9, ovipositor 3.0-3.8, wing 3.1-3.4. 



Range in length of 38 pinned specimens 2.4r-3.7 mm. Average 

 2.83 mm. 



Type.— Cut No. 21793, U.S.N.M. Type and 24 paratypes. 



Paratypes also in Carnegie Museum, Pittsburgh, Pennsylvania. 



Host. — Quercus agrifolia Nee, Quercus califoivnca Cooper, Quer- 

 cus ivisUmeni A. de Candolle. 



Gall. — A compact stony -hard mass containing four to a score or 

 more confluent cells inside of and in agHfolia and wUliseni acorns 

 more or less filling the interior of the acorn, which is frequently re- 

 duced in size (fig. 2). The woody mass thus occupies the center 

 of the acorn instead of the cotyledons, extends its whole length, and 

 when the acorn is cut open can be lifted out intact. In calif ornica 

 the acorns are of normal size and the cotyledons are present but dis- 



