20 PROCEEDINGS OF THE NATIONAL MUSEUM vol.68 



14 : 12 : 11 : 10 : 9 : 8 : 8 : 8 : 7 : 7 : 11. Scattered short white hairs on sides 

 of pronotum, on mesoscutum and scutellum. Mesoscutuni coriaceous, 

 shining, parapsidal grooves deep, smooth, percurrent. Disk of 

 scutellum smooth and bare in center, rugose behind, its sides bounded 

 by diverging straight lines, a transverse furrow at base indistinctly 

 showing two smooth pear-shaped pits. Carinae on propodeum 

 arcuate, enclosed area broader than high, neck rugose. Mesopleura 

 smooth. Tarsal claws with a tooth. Wing hyaline, pubescent, ciliate, 

 first abscissa of radius arcuate, areolet and cubitus faint. Abdomen 

 as long as head and thorax, lengths of tergites along dorsal margin 

 as 55 : 14 : 2, second pubescent on sides at base, hind margin oblique, 

 ventral spine slender, in side view five times as long as broad. Using 

 width of head as a base the length of mesonotum ratio is 1.4, an- 

 tenna 2.5, ovipositor 3.0, wing 4.6. Range in length 1.5-2.1 mm. 

 Average of 69 specimens 1.70 mm. 



Type.— Cfii. No. 27187, U.S.N.M. Type and 29 paratypes. Para- 

 types at American Museum, Field, Stanford, Harvard, and Phila- 

 delphia Academy. 



Host. — Quercus undulata. 



Gall (fig. 32). — Shaped like a small onion, tan-colored, single 

 or scattered in small numbers on under side of leaf in the fall, 

 persisting on the leaf through the winter. The basal third of the 

 sessile gall is beset with long straight single-celled hairs which are 

 mostly reflexed toward the leaf surface. The conical apex is often 

 lop sided and an opening at the end leads into a thin-walled cavity 

 in which are a few scattered hairs and in the base of which is the 

 transversely placed thin-walled larval cell in the very base of the gall. 

 Inside the larval cell at the pedicel is a thin v/hite disk. 



Ilahitat. — The type is selected from a series from galls collected 

 November 14, 1921, near Hillsboro, N. Mex., the flies emerging 

 April 5-25, 1922. Paratypes are from Tijeras, N. Mex., and of 

 the adults cut out of the galls on November 1 some lived in a pill 

 box until December 28. Other paratypes are from Blue Canyon 

 west of Socorro, adults being cut out of the galls on January 2. 

 The galls were seen also at Hackberry, Ashfork, and AVilliams, 

 Ariz. Similar galls were seen on Q. grisea at Magdalena, N. Mex. 



DIPLOLEPIS CAPILLATA. new species 



Female. — Black ; mandibles, base of antennae, legs and ventral 

 spine brownish. Head coriaceous, vertex bare and shining; from 

 above transverse, as broad as thorax, scarcely broadened behind 

 eyes; from in front facial line .6 transfacial and area one and four- 

 tenths times as broad as high, malar space .4 eye without groove, 

 radiating ridges on either side of clypeus, antenna 14-segmented, 

 lengths as (scape) 10 : 6 : 12 : 11 : 10 : 8 : 7 : 7 : 7 : 6 : 6 : 6 : 6 : 10, the last 



