;,KT. 10 GALL-INHABITING CYNIPID WASPS WELD 29 



GaU. — A seed-like, thin-walled cell produced inside the winter 

 buds and usually completely hidden by the bud scales. It is 2.5-3 

 mm. long, slightly flattened, with a sort of scar at the blunt-pointed 

 apex, light colored with surface slightly veined. Usually only one 

 in a bud and excentrically placed, not injuring the growing point. 

 If two are present the bud is usually visibly deformed. The exit 

 hole .8 mm. in diameter is made in the side of bud through the bud 

 scales. Wall .1 mm. thick. 



Habitat. — Type locality Cottonwood, Shasta County, Calif. On 

 December 7 at the writer's request A. W. Gambs collected small 

 branches of the ''river bottom" oak bearing twig galls of Dishol- 

 caspis eldoradensis Beutenmueller but the adults had all emerged. 

 In this box of material small gall-makers were found to be emerging 

 on Januarj^ 6 and an examination disclosed these bud galls. Others 

 emerged January 16, 20, 21, 22 and several were cut out of the galls 

 in dissected buds. The writer has collected old buds of this oak in 

 summer showing this characteristic exit hole at Newhall, Ojai. Santa 

 Margarita, Paso Robles, Los Gatos, Palo Alto, St. Helena, Lake- 

 port, Chico and Red Bluff, Calif. Similar exit holes have been 

 noted in old buds of Q. douglasii, dumosa., durata^ and garryana but 

 no adults were reared from these hosts. 



DIPLOLEPIS OPERTA, new species 



FemoJe. — Black, front tibiae and all tarsi brownish; head cori- 

 aceous: from above transverse, cheeks broadened behind eyes, occi- 

 put scarcely concave; from in front facial area wider than high, 

 radiating ridges and scattered white pubescence about mouth, malar 

 space .45 eye without groove, antenna 13-segmentecl, lengths as 

 (scape) 10:7:11:12:9:9:7:7:7:7:7:6:12. Sides of pronotum 

 with setigerous punctures. Mesoscutum coriaceous, anterior and 

 lateral lines smooth, parapsidal grooves smooth, narrow, percurrent, 

 no median, a few white hairs along grooves. Scutellum finely 

 rugose, pits at base smooth, narrow, septum thin. Carinae on pro- 

 podeum converging above. Mesopleura shining above. Claws with 

 tooth. Wing hyaline, pubescent, ciliate, veins distinct, first abscissa 

 of radius almost arcuate, areolet reaching one-sixth, cubitus one- 

 half way to basal. In fresh specimens abdomen longer than head 

 and thorax with lengths of tergites along dorsal curvature as 

 41:19:13:12:10; when dry but two or three tergites showing on 

 dorsal margin, base of second slightly pubescent on sides, ventral 

 spine unusually long and slender, in side view ten times as long 

 as broad. Using width of head as a base the length of mesonotum 

 ratio is 1.3, antenna 2.3, ovipositor 4.3, wing 4.2. 



Length. 1.5-2.4 mm. Avei-age of 36 specimens. 1.95 mm. 



