96 PROCEEDINGS OF THE NATIONAL MUSEUM vol.68 



trans is described as without a median groove, but this specimen 

 in certain positions sliows a faint median line, while the groove in 

 some of the many available parataypes of impositus is fully as 

 faintly defined. The writer is unable to separate paratypes of vetn- 

 f actor from lustrans. The gall of this species was first described by 

 Osten Sacken in 1862, but Ashmead was evidently in error in think- 

 ing he had reared it in 1887, associating the wingless fly he reared 

 with the wrong gall. These galls occur as midrib clusters on under 

 side of leaves of Quercus stellata in the fall, dropping when mature. 

 When fresh the individual galls are shaped like huckleberry flowers, 

 somewhat cylindrical Avith the end distinctly truncate and depressed, 

 but during the winter on the ground they become globular except for 

 a short pedicel, and the depressed end becomes a flattened circular 

 scar at apex with a slightly raised rim, and the greenish or reddish 

 color changes to broAvn. 



Beutenmueller sent the writer galls from New York City which 

 contained pupae on November 1 and adults on November 25 (age of 

 galls unlvnown). The writer collected galls at Poplar Bluff and 

 Ironton, Mo. ; Wharton, Trinity, Arlington, and Boerne, Tex. ; Hugo, 

 Okla. At Hugo they were just starting to develop on July 25. 

 Galls collected in October, 11)17, at Trinity, Tex., gave two adults 

 May 18, 1919. In galls collected at Ironton in fall of 1917 pupae 

 were found in October, 1918, and in March, 1919, flies emerging 

 before May 12, 1919. S. A. Rohwer collected galls at Ironton in 

 October, 1918, and reared adults April 9-16, 1919, and a few more 

 were found dead in cage May 12, 1920 (Hopkins U. S. No. 10777J). 



A precisely similar gall on the shin oak, Q. hreviJoha., was seen at 

 Austin and Boerne, Tex., and may prove to be that of this species. 



CALLIRHYTIS MAMILLAFORMIS, new species 



Female. — Reddish-brown, the head, antennae, anterior and lateral 

 lines, and dorsal part of abdomen infuscated (in the type the abdo- 

 men is a clear dark red). Head coriaceous, pubescent on face; from 

 above transverse, as broad as thorax, cheeks scarcely broadened be- 

 liind eyes; from in front facial area one and one-flfth times as 

 broad as high, malar space 0.37 eye, without grooves, antennae 13- 

 segmented, lengths as (scape) 16:6:18:15:13:11:9:8:7:7:7:7: 

 16. Thorax covered with white pubescence, mesoscutum coriaceous 

 with uniformly distributed setigerous punctures, parapsidal grooves 

 narrow, deep, smooth, percurrent, well-separated behind, no median. 

 Scutellum rugose the two oblicpie smooth pits at base almost conflu- 

 ent. Carinae on propodeum straight and parallel. Mesopleura with 

 large smooth bare area. Hind tibia longer than tarsus, claws simple. 

 Wing hyaline, pubescent, ciliate, veins beyond second cm^s-vein pale. 



