Vol. IX] MALLOCH— FLIES (DIPTERA) FROM CALIFORNIA 307 



female, No. 536, C. A. S., same locality, July 9, 1919 (F. C. 

 Clark, coll.), paratypes, male and female, Mt. Moscow, Ida., 

 June 4, 1910, female, same locality, July 1, 1909; J. M. 

 Aldrich, collector. 



10. Pegomyia vanduzeei, new species 



Male. — Black, slightly shining, with slight grayish pruines- 

 cence on thorax and dense drab-gray pruinescence on dorsum 

 of abdomen. Head black, orbits, face, and cheeks with dense 

 but not conspicuous whitish pruinescence ; antennas black ; 

 palpi reddish testaceous; thorax faintly trivittate; abdomen 

 with a moderately broad black dorso-central vitta ; hypopy- 

 gium black, the small rounded knoblike bases of the forceps 

 yellowish testaceous ; legs black, all tibiae rufous-testaceous ; 

 wings clear, veins dark brown ; calyptra and halteres yellow. 



Eyes separated by about twice the width of anterior ocellus ; 

 orbital bristles extending more than midway to anterior 

 ocellus, parafacial a little broader than third antennal joint, 

 not narrowed below ; third antennal j oint nearly twice as long 

 as second, the latter with numerous short stout hairs and some 

 longer bristles on dorsal surface ; arista nearly bare, very con- 

 spicuously swollen on basal sixth. Thorax with three pairs 

 of long presutral acrostichals ; prealar half as long as the 

 bristle behind it ; sternopleurals 1 :2. Abdomen flattened, 

 parallel-sided; second (first visible) segment longer than 

 third; hypopygium moderate in size, bases of forceps almost 

 globose, very noticeable owing to their pale color; fifth stern- 

 ite with a number of stiff short bristles at apex of each 

 process. Fore tibia with a posterior bristle ; fore tarsus 

 normal, much longer than tibia ; mid-femur with a series of 

 bristles extending from base to beyond middle on postero- 

 ventral surface ; hind femur with a series of very long bristles 

 on antero-ventral surface and another on basal half of postero- 

 ventral ; hind tibia with two antero-ventral. two antero-dorsal, 

 and two postero-dorsal bristles. Costal thorn small ; veins 

 three and four subparallel ; outer cross-vein straight. Lower 

 calypter but slightly protruded beyond upper. 



Type, male, 5.5 mm. long. No. 537, C. A. S., San Fran- 

 cisco, Calif., March 30, 1919; E. P. Van Duzee, collector. 



