32 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 79 



strongly compressed, mostly bare as usual, segments 1 and 2 polished, 

 from 3 to apex very finely coriaceous, ovipositor sheath moderately 

 hairy. 



Mole. — Length 3.3 to 4 mm., otherwise like the female, except 

 antennae, which are as follows : Flagellum slenderer than in female, 

 scape as long as pedicel, Fl, and half of F2 combined, pedicel and Fl 

 uniform in length, Fl barely longer than F2, F3 and F4 equal in 

 length, slightly shorter than F2, and twice as long as thick, funic- 

 ulars uniform in diameter, club compact, but sutures plain, feebly 

 thicker than funicle, one-tenth shorter than F3 and F4 combined. 



Type locality. — Los Angeles County, Calif. 



rype.— Female, U.S.N.M. No. 20247. 



Redescribed from the type, the allotype, and the specimens cited 

 below. Original description from type and allotype, from type 

 locality. The allotype, which is in the United States National 

 Museum, was taken in April. The type specimens represent the 

 darker color extreme of the species. In spite of this, and the lack of 

 host data for the type, I feel reasonably certain that these are the 

 same species as the specimens recorded below. 



Retiiarks. — D. isis Girault lies between D. duhia Walsh and D. 

 varians Walsh. It leans toward variant in the form and larger size 

 of the submarginal band, but this is not often so extremely developed 

 as in varians, and usually has the proximal margin more or less con- 

 cave as in duhia. In its size it favors duhia, and in the head dimen- 

 sions and the number of submarginal hairs it approaches this species 

 more closely. But in its host relations it exhibits greater affinity for 

 varians in that it has been reared from Andricus, and never from 

 Disholca^pis, from which most of the specimens of duhia have been 

 obtained. 



In addition to the type specimens I have the following material 

 reared from California galls : 4 females and 2 males from Andricus 

 suttoni (Bassett), on California live oak (Quercus agnfoUa) at Car- 

 mel; 6 females from the same gall and oak at Pasadena; 12, mostly 

 males from A. poinifonnis (Bassett) on Q. agrifoUa at Pasadena; 

 2 females and 3 males from A. spectahilis Kinsey on Q. chrysolepis 

 at San Jacinto ; the above were reared by Doctor Kinsey, the cynipid 

 gall makers issuing in February and March, 1920. I have one 

 female from the same worker from Plagiotrochus chrysolepidicola 

 (Ashmead) on Q. dwnosa, at Paso Eobles, the gall maker having 

 been reared March 7, 1920. This specimen differs from the rest of 

 the series in having the front half of the prothorax reddish, and the 

 basal half of the abdomen below yellowish brown. Another fem^ale 

 collected by A. F. Leach and sent nic by Doctor Kinsey is from 

 A. calif orniGus (Bassett) on California white oak i^Q. lohata) at 

 Diablo, Calif. 



