52 



Indiana University Studies 



Herb.). Probably found thruout northern California, Oregon, Washing- 

 ton, and British Columbia, wherever Q. garryana occurs. 



TYPES. — 5 females, 10 galls. Holotype female, paratype females, 

 and galls in The American Museum of Natural History; paratype fe- 

 males and galls with the author. Labelled Portland, Oregon; October, 

 1905; E. 0. Hovey collector. 



By a mistake in identification of this Hovey material, this 

 species has gone thru the literature as Gillette's macu- 

 lipe7inis. The two are generically related, but are very distinct 

 species. Mactdipennis was described from New Mexico, and 

 is restricted as far as I know to a southern Rocky Mountain 

 area; mirahilis is confined to the Vancouveran zone of the 

 Pacific Coast, at present recorded only from Quercus garry- 

 ana, or some of its varieties, on which oak it is very abundant. 

 Apparently adults emerge late in the fall or early in the 

 spring, for by early March the galls are all vacated. This 

 species belongs to Cynips Hartig; and not to Cynips of most 

 American authors ; the species shows also some characteristics 

 of Amphiholips, with which genus the physiology reflected by 

 gall characters would connect the insect. 



Diastrophus kincaidii Gillette 



FEMALE. — Wholly black except on legs and mouthparts; median 

 groove short; fovese not sharply defined; first abscissa of the radius 

 almost straight. HEAD: Broader than the thorax, somewhat enlarged 

 behind the eyes ; black, mouthparts yellow to ruf o-piceous ; vertex smooth 

 and naked, a few scattered hairs behind the eyes, face puncto-rugose, 

 hairy; rugose, radiating striations from the mouth to the eyes. An- 

 tennae brownish black to black, browner basally; pubescent; with 13 

 segments, the second not quite globose, the third half again as long as 

 the fourth, the last almost twice the length of the preceding. THORAX : 

 Entirely black; mesonotum smooth, shining, and naked; parapsidal 

 grooves rather fine but distinct, continuous to the pronotum where they 

 are widely divergent, gradually and closely convergent at the scutellum; 

 median groove distinct in some irregular sculpturing between the parap- 

 sides at the scutellum, usually short, sometimes discernible for a third 

 or more of the mesonotal length; anterior parallel and lateral lines 

 practically absent, barely indicated sometimes; scutellum elongate, nar- 

 row, rather finely rugose, depressed anteriorly, the depression divided 

 by a rugose, raised area into smaller or larger foveas; pronotum moder- 

 ately broad dorsally, puncto-rugose and scatteringly hairy; mesopleurae 

 mostly smooth and naked, finely rugose dorsally, finely aciculate cen- 

 trally and scatteringly elsewhere. ABDOMEN: Black, piceous basally 

 and ventro-posteriorly, entirely naked and smooth, extending ventrally 

 as far as or farther than dorsally, segments produced somewhat dorsally, 

 edges oblique and very much rounded ventrally; second segment small, 



