﻿340 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 102 



Habitat. — ^The type material was collected at Mineral Wells, W. 

 Va., by Dr. A. D. Hopkins on September 4 and October 8, 1943. By 

 September 12 most of the specimens had fallen to the ground, and he 

 estimated that there were over a bushel of the galls (from 50 to 100 

 to a square foot) under this one large tree. Adults emerged from an 

 outdoor breeding cage at Falls Church, Va., on March 28 and April 

 1, 6, 14, 1945, March 29 and April 5, 1946, and April 12, 18, 1947. 

 Galls on this host have been seen at Washington, D. C, and Kosslyn, 

 Va. Alternating generation unknown. 



CALLIRHYTIS OBLATA, new species 



Female. — Bicolored ; red with black on anterior and parallel lines, 

 on foveae, sternum, middle and hind tibiae and all last tarsal seg- 

 ments. Head fi*om above transverse, as broad as thorax, occiput 

 concave; from in front broader than high, cheeks broadened behind 

 eyes, malar space half eye without groove. Antennae 13- or 14-seg- 

 mented, first six as 16:10:19:18:15:13. Mesoscutum coriaceous with 

 scattered punctures and short appressed pubescence. Parapsidal 

 grooves deep, narrow, smooth, not percurrent, median almost as long 

 as parapsidal. Scutellum rugose, the two pits at base separated by a 

 septum. Mesopleuron largely aciculate and bare. Wing hyaline, 

 pubescence short, nonciliate, veins beyond second cross-vein scarcely 

 evident. Claws simple. Carinae on propodeum straight, parallel, 

 enclosed area broader than high. Abdomen with an interrupted ring 

 of white hairs at base. Lengths of tergites along dorsal curvature 

 as 87:24:14:11:11. Hind margin of tergite II and exposed parts of 

 rest punctate. Ventral spine slender, longer than hind tibia. Using 

 width of the head as a base the length of mesonotum ratio is 1.2; 

 antenna 2.1 ; wing 4.2 ; ovipositor 4.8. Range in length 2.85-3.8 mm. 

 Average of 18 specimens 3.29 mm. It seems to be related to those 

 species of the genus that are reared from root galls. Has a much 

 longer ventral spine than C. fulva Weld. 



Types. — U.S.N.M. No. 60128 : Type and four paratypes. Paratypes 

 also in A.M.N.H., C.M.N.H., A.N.S.P., C.A.S., and M.C.Z. 



Hosts. — Qiiercus coccinea and Qvercus falcata., Spanish oak. 



Gall (pi. 16, fig. 7) . — A green, smooth, bare bud gall at apex of new 

 growth in May, dropping to ground when mature. An oblate sphae- 

 roid, 4r-5 mm. in diameter by 2.5 mm. high, red in center above but 

 without a nipple, not at all hidden by bud scales ; when detached with- 

 out a girdle of hairs at base. 



Habitat. — The type is selected from a series that emerged March 

 21, 1946, from galls collected on Spanish oak at Dyke, 3 miles south 

 of Alexandria, Va., on April 19, 1945. Paratypes are from galls on 

 scarlet oak collected near Vienna, Va., and at East Falls Church, Va. 



