16 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 01. 



with groove, ocellocular space slightl}^ greater than antennocular. 

 palpi 5- and 3-segmented, antennae 13-segmented, lengths of first 

 five segments in balsam as 17:7:14:12:11, 6-12 gradually shorter, 

 last twice preceding. Sides of pronotum rugose, Mesoscutum 

 broader than long, rugose all over, parapsidal grooves complete, con- 

 verging abruptly as they approach scutellum where their separation 

 is less than that between the faint anterior lines. Scutellum also 

 rugose, the transverse groove at base with about 8 longitudinal ridges 

 of which the median is slightly heaviest. Carinae on propodeum 

 slightly bowed out, the area between with about seven minor vertical 

 ridges. Hind tarsus slightly shorter than tibia, second and fifth 

 equal, claws simple. Wing hyaline, veins very pale, onl}^ short traces 

 of those beyond second cross-vein visible, no areolet, pubescence on 

 surface visible only under high magnification, margin not ciliat«. 

 Abdomen slightly compressed, broader than long, obliquely placed, 

 second tergite occupying .69 of the dorsal length, smooth, exposed 

 parts of others microscopically coriaceous, ventral spine not longer 

 than broad, ovipositor when dissected out about 1.75 times length of 

 antenna. Using width of head as a base the length of mesonotum 

 ratio is 1.17, antenna 1.8, ovipositor 3.25, wing 3.0. 



I^ength of three pinned specimens 3.0-3.1 mm. 



Type.—QdX. No. 6419, TT.S.N.ISI. Three cotypes. 



Host. — Quercus hrevifolia Sargent. 



Gall. — A mass of confluent woody cells inside the acorn in place of 

 the normal cotyledons. Found in fall affecting acorns of current 

 season's crop and causing them to be more or less stunted in size. 



Ilahitat. — The type locality is Palestine, Texas, where affected 

 acorns were collected October 16, 1917. Five living flies were cut 

 out of galls on December 1, 1919, and as full-grown larvae were also 

 found the emergence is distributed over at least two seasons. The 

 normal emergence is probably in the spring. Similar galls were 

 seen at Ocala and at St. Petersburg, Florida, in autumn of 1919. 



CALLIRHYTIS CORRUGIS (Bassett). 



Gynips cornn/is Bassett, Canad. Ent.. vol. 13, 1881, p. 109. 

 This species was described from one specimen taken on May 1 1 at 

 Waterbury, Connecticut, from the claws of a spider on flowers of 

 Q. 2)rinoides. It is preserved in the Academy of Natural Sciences, 

 Philadelphia, where the writer has examined it. It is a Callirhytis 

 with nonciliate fore wings, pale venation, simple claws, and is clearly 

 related to those species knoAvn to have been reared from stone galls 

 in acorns. The mesoscutum is rugose all over, not tranversely so, 

 coarser behind, the transverse groove at base of scutellum is rugose 

 and of uniform width so that disk is rounded in front, the carinae 



