224 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.59. 



still contained larvae in December when others in the same groups 

 contained adults suggests that the emergence is distributed over two 

 years. Similar galls were collected on Q. myrtifolia at Daytona, 

 Florida, on November 20, 1919. Some pupae had already trans- 

 formed into adults and a few were still in pupa state when flies were 

 cut out on November 28 and December 3. At Boerne, Texas, October 

 26, 1917, old galls were seen on Q. texana as well as full-grown fresh 

 ones, some of which contained a thick nutritive layer and others pupae 

 or adults. 



24. CALLIRHYTIS RUBIDA, new species. 



Plate 36, fig. 31. 



Female. — Head and thorax deep red to black, legs and antennae 

 brownish-red, abdomen infuscated, red at base. Head broad as 

 thorax, rugose, whitish hairs on face, clypeus almost smooth, inter- 

 ocular area 1-1.2 times as broad as high, malar space 0.3-0.4 eye with 

 a few parallel ridges, mandibles 2-toothed, palpi 5- and 3- segmented, 

 antenna 14-segmented, third a trifle shorter than first, second and 

 fifth equal, 4-13 gradually shorter, last a little longer than preceding. 

 Some specimens have 12 segments, the last with one or even two incom- 

 plete transverse grooves. Pronotum rugose. Mesoscutum distinctly 

 coriaceous with setigerous punctures scattered along grooves, parap- 

 sides complete, rugose, slightly wider behind, median complete, par- 

 allel and lateral lines not polished, but sunken. Scutellum coarsely 

 rugose with coriaceous spot on disk sometimes, arcuate furrow at 

 base rugose, and separated from impressed areas on sides, divided 

 into two pits. Propodeum with two straight parallel ridges inclosing 

 a reticulate area in which there is sometimes a trace of a median ridge. 

 Mesopleura finely rugose with parallel longitudinal ridges across mid- 

 dle. Hind tarsus shorter than tibia, second shorter than fifth, claws 

 simple. Wings hyaline, veins brown, first abscissa of radius slightly 

 clouded and faintly angled in middle, areolet complete, reaching about 

 one-fifth distance to basal, cubitus not reaching basal, surface pubes- 

 cent, ciliate only on hind margin of hind wing. Abdomen smooth and 

 shining, longer than high, laterally compressed, second segment occu- 

 pying about two-thirds and with only inconspicuous patches of hair 

 on sides, its hind margin and exposed parts of rest microscopically 

 punctate, ventral spine short, in balsam about twice as long as broad, 

 ovipositor when dissected out nearly one and two-thirds times length 

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

 ratio is 1.3-1.4; antenna, 1.9; ovipositor, 2.9-3.0; wing, 3.6. 



Length of 9 pinned specimens, 3.4-3.8 mm. Average, 3.6 mm. 



Type.— Cat. No. 22570, U.S.N.M. Type and 8 paratypes. 



Host. — Quercus coccinea Muenchhausen. Quercus rubra Linnaeus. 



Gall. — Cells in the thick brown bark at or just below surface of 

 ground on stumps or trees. Abrupt local swellings are formed 



