40 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 68 



Type.—C2ii. No. 27196, U.S.N.M. Type and 69 paratypes. 

 Paratypes in American Museum, Field, Stanford, and Philadelphia 

 Academy. 



Host. — Quercus grisea, undulata, arisonica, ohlongifolia. 



Gall (fig. 38). — In clusters of 2-20 on the peduncle. Individual 

 galls slender, conical, 10-12 mm. long, sharp at tip, tapering below 

 to about 3 mm. in diameter and more or less clasping at its star- 

 shaped base. Monothalamous, wall .3 mm. thick, exit hole in side 

 1.2 mm. in diameter. Colored like the bark, darker at apex. 



Biology. — While growing in the late summer the galls are green 

 but by November 1 in the Sandia Mountains they were turning 

 brown and contained adults which emerged during last week in 

 December and first two weeks of January. 



Habitat. — The type locality is Magdalena, N. M. {Q. grisea) 

 and paratype localities: Tijeras, N. M. {Q. midulata) and Oracle, 

 Ariz. {Q. arizonica). The writer has also collected galls at 

 Socorro, Nogal Canyon, Hillsboro, Kingston, and in the Burro 

 Mountains, N. M. ; and at Prescott, Hackberry, Nogales, Patagonia, 

 Bisbee, and in the Chiricahua, Huachuca, Tumacacori, and Santa 

 Rita Ranges in Arizona. The University of Arizona has galls on 

 an herbarium specimen of oak from Ashfork, Ariz. 



DISHOLCASPIS PERNICIOSA (Bassett) 



The galls were observed at Trinidad, Morley, Wetmore, and 

 Garden of the Gods, Colo. ; Las Vegas, Glorieta, Rowe, and Tijeras, 

 N. M. ; Flagstaff, Williams, Prescott, and Grand Canyon, Ariz. 

 They were just starting at Trinidad on July 10 and at Wetmore 

 contained adults on October 6. The flies probabl}^ emerge in No- 

 vember or early December. The galls were observed on Q. ga?nhelii, 

 fendleri, and grisea. 



DISHOLCASPIS PRUNIFORMIS Kinsey 



The galls of this species were collected on Q. stellata and laceyi 

 at Austin, Boerne, and Kerrville, Tex. Galls at Austin contained 

 pupae on October 30, November 13 and 21, 1917. Adults were cut 

 out of the galls on December 10. 



DISHOLCASPIS SILERI (Bassett) 



The gall of this species, described from an unknown oak in south 

 ern Utah, is a monothalamous stem swelling resembling the eastern 

 club gall on Avhite oak. Galls which agree with the Bassett types 

 have been collected by the writer on Quercus gariibeJlh grisea, 

 undulata., and reticulata at the following localities: AVetmore, West 

 Cliff, Trinidad, and Morley, Colo.; Wagon Mound, Rowe, Tijeras, 

 Socorro, Magdalena, Nogal Canyon, and Fierro, N. Mex. ; Prescott, 



