14 PKOCEEDINGS OF THE NATIONAL MUSEUM vor,. 68 



April 11; and at Chevy Chase, Md., on April 18. At Washington 

 adults Avere emerging March 27, 1921, and in the late season of 1924 

 on April 26. In emerging the flies chew out a round piece, which 

 often remains as a hinged lid. On Q. montana galls were seen at 

 Washington, Avith flies emerging April 22, 1923. On Q. hicolor the 

 galls were common at Evanston, 111., being noticed as early as 

 March 28, 1909, and March 27, 1910 (adults emerged and died in 

 jar before April 20). In 1912 emergence Avas in late April, only 

 one fly being reared from galls collected May 6. In 1913 galls Avere 

 collected on April 15, some already shoAving exit holes, adults emerg- 

 ing by April 27. While gathering the galls an adult thought to 

 be of this species Avas observed OAdpositing in a bud. On Q. 

 macrociiTfa galls Avere found at Evanston May 1, 1913, and on April 

 27, 1915, three empty ones from AAdiich adults had recently emerged, 

 and near by two adults perhaps from these galls Avere seen oviposit- 

 ing in buds. Similar galls occur at Washington on Q. stellata^ the 

 flies emerging March 27-30, 1921, and April 25-29, 1924. 



DIPLOLEPIS ACRASPIFORMIS, new species 



Female. Almost all black, legs and some other parts broAvnish. 

 Head coriaceous; from above transverse, as broad as thorax, cheeks 

 broadened behind eyes, occiput slightly conca\'e; from in front 

 facial quadrangle one and four-tenths times as broad as high, malar 

 space half eye Avithout grooA^e, antenna 13-segmented, lengths as 

 (scape) 12:6:21:18:15:14:12:10:8:7:6:6:12. Thorax covered 

 with short uniformly distributed white hairs not hiding sculpture. 

 Mesoscutum not quite smooth, parapsidal grooA^es deep, narrow, 

 smooth, percurrent, no median. Disk slightly rugose, with trans- 

 verse furrow at base. Carinue on propodeum Aveak, curA'ed, neck 

 smooth. Mesopleura smooth. Hind tarsus shorter than tibia, seg- 

 ments as 25 : 12 : 8 : 5 : 13 (Avith claAv 20) . ClaAvs Avith tooth. Wing 

 subhyaline, pubescent, ciliate, A^eins brown, first abscissa of radius 

 arcuate, second curA^ed and sAvollen at free end Avhich does not quite 

 reach Aving margin, areolet reaching nearly one-fourth Avay to 

 basal, cubitus reacliing basal, a cloud on break in anal, one aboA^e 

 basal third of cubitus on first abscissa of radius and tAA'o in the 

 apical cell, the loAver one someA\hat elongated, dividing the cell 

 into thirds. Abdomen longer than head and thorax, length to height 

 to Avidth as 38 : 29 : 23,* lengths of tergites along dorsal margin as 

 32:6:5, sides of second pubescent at base, dorsal margin straight 

 and hind margin A'ery oblique, A-entral valves oblique, not protrud- 

 ing, ventral spine hairy, broad, abruptly tapering toAvard apex. 

 Using Avidth of head as a base the length of mesonotum ratio is 1.3, 

 antenna 2.5, Aving 4.6, ovipositor 1.9. Length. 2.7-3.6 mm. AA'erage 

 of 12, 3.18 mm. 



