54 MISC. PUBLICATION 4 7 0, U. S, DEPT. OF AGRICULTURE 



basally and apically, and fourth indistinctly indicated, following outline of lateral 

 margin; and with three slightly depressed cupreous foveae, one interrupting 

 second costa in front of middle, one between first and second costae at apical 

 third, and the other interrupting third costa behind middle. 



Abdomen beneath sparsely, finely, shallowly punctate, slightly rugose at sides 

 of basal sternites, sparsely clothed with short, recumbent, white hairs, without 

 distinct, smooth, elevated, lateral callosities, intervals obsoletely granulose; last 

 visible sternite broadly, arcuately emarginate at apex, transversely truncate at 

 middle of emargination, lateral margins distinctly serrate ; eighth tergite rather 

 deeply emarginate at apex, sparsely, coarsely punctate, densely granulose, but 

 not longitudinally carinate. Prosternum coarsely, confluently punctate, sparsely 

 clothed with long, semierect hairs ; anterior margin with a broad, short, median 

 lobe. Anterior femur with a short, obtusely triangular tooth, which is finely 

 dentate on outer margin. Anterior tibia slightly arcuate, with a short, obtusely 

 angulated dilation near apex ; middle and posterior tibiae nearly straight, slightly 

 dilated at apices. 



Length 10.5 mm., width 4 mm. 



Female. — Differing from male in having the head uniformly brownish cupreous, 

 the last visible sternite broadly rounded and vaguely emarginate at apex, the 

 eighth tergite broadly rounded at apex, and more finely punctured, the prosternum 

 more sparsely punctured and with the pubescence shorter, and the anterior tibia 

 unarmed at apex. 



Kedescribed from the male type and female allotype in the collec- 

 tion of W. J. Chamberlin. 



Type locality. — Of oregona, Bull Prairie, Lake County, Oreg., July 

 27; of planomarginata, the same locality, July 24. Types in the col- 

 lection of W. J. Chamberlin. 



DISTBrBUTION 



From material examined : 



Oregon: Bull Prairie, 7,000 feet elevation, Lake County, July 24-27; Sparta, 



July 2 (W. J. Chamberlin). 

 Washington : Ellenburg, July 25, 1932, reared (William W. Baker). 



Chamberlin (1938) records it from Grant County, Oreg. 



Host. — This species has been reared from geranium (Geranium sp.) 

 by William W. Baker. 



Very little variation was observed in the few examples examined, 

 except that the lateral margins of the last visible sternite are either 

 entire or slightly serrate. 



Dr. Chamberlin has kindly lent the types of both species to the 

 writer for study, and from the examination of these types the writer 

 is unable to separate planomarginata from oregona. The types of 

 oregona are slightly larger than those of planomarginata, but there is 

 considerable variation in the size of a series of the closely allied 

 fragariae reared from strawberry plants. In the male type of plano- 

 marginata the lateral margins of the last visible sternite are entire, 

 whereas in the female type of that species the sides are slightly serrate 

 as in the types of both sexes of oregona. The genitalia and the tooth 

 on the anterior tibia of the males of both species are alike. 



This species is very closely allied to fragariae Fisher, but on account 

 of the small number of specimens available for study the two species 

 are considered as valid for the present. In the specimens examined 

 the male genitalia of the two species are alike, but the tooth on the 

 anterior tibia of the male of oregona is more angulated at the apex, 

 and the costae on the elytra are more distinct, than in fragariae. 



