ART. 10 GALL-INHABITING CYNIPID WASPS WELD 7 



Abdomen in living specimens longer than head and thorax, collaps- 

 ing in drying, tip of ventral valves and ovipositor protruding, ven- 

 tral spine in side view scarcely as long as broad. Using width of 

 head as a base the length of mesonotum ratio is 1.3, antenna 2.4, wing 

 5.0, ovipositor 5.4. 



Length 1.4-2.2 mm. Average of 40 specimens 1.87 mm. 



Ti/pe.—CsLt. No. 28057, U.S.N.M. Type and 9 paratypes. Para- 

 types in American Museum, Field, Harvard. Stanford, California 

 Academy, and Philadelphia Academy. 



Host. — Quercus lobata. 



Gall. — A cell about 1.8 mm. long lying in the wood under a leaf 

 or flower scar, the upper end nearly reaching but not showing at 

 the surface until the adult begins to make the exit hole. But one 

 or rarely two under a scar. Exit hole in the scar or near it. Found 

 about the terminal cluster of buds or sometimes at the internodes 

 forming the annual ring. Similar to the gall of the eastern species 

 described above but the adult is different. 



^(7?|^Yff/.— Cottonwood, Shasta County, Calif. Twigs collected 

 by A. \s . Gambs on December 7 gave adults indoors January 6 and 

 from others collected late in January adults emerged February 9 

 and 11. The normal emergence is probably before the buds start 

 in the spring. 



NEUROTERUS EXIGUUS Bassett 



Spindle-shaped fleshy enlargements of the staminate flower axis 

 of Quey'cus stellata at Alexandria, Va., gave adults of this Neuro- 

 teriis on May 12, 1920. The galls were also seen at Kosslyn. Along 

 with these swellings and sometimes on them were tan-colored, thin- 

 walled, somewhat hairy, oval galls evidently representing enlarged 

 filaments which also seem to contain this Neuroterus. 



NEUROTERUS FLOCCOSUS (Bassett) 



Galls of this species on Quercus hicolor were common in fall at 

 Evanston, 111., often deforming all the leaves near the tip of thrifty 

 sprouts. Adults issued April 15. Have had specimens of gall from 

 Becker, Minn., (L. Haney) and the Pergande collection contained 

 galls from St. Louis, Mo. 



NEUROTERUS IRREGULARIS (Ostcn Sacken) 



Galls collected at Clarendon, Va., but a few miles from the type 

 locality of this species, on an isolated tree of Quercus stellata on 

 which fully half of the leaves bore galls, gave adults May 14r-20, 

 1923. At this time the recently emerged flies were seen resting on 

 the leaves by hundreds, the females ovipositing on the under surface. 

 In early September this tree bore thousands of small, nearly spheri- 



