180 NEW NORTH AMERICAN ANTHOMYIIDAE (dIPTERa) 



June 20, 1917, (J. R. Malloch) ; Plumnier's Island, Maryland, 

 April 2(), 1908, July 11, 1909, September 1, 1907, September 29, 

 1915 and October 22, 1915, (W. L. McAtee); June 30, 1907 

 and October 13, 1906, (A. K. Fisher); Swarthmore, Pennsylvania, 

 June 11, 1905 and September 3, 1914, (E. T. Crcsson, Jr.). 

 Twenty specimens. 



The Illinois specimens are in the collection of the Illinois Nat- 

 ural History Survey; the Maryland specimens ar(> in the collec- 

 tion of the U. S. Bureau of Biological Survey; and the Pennsyl- 

 vania specimens in the collection of The American Entomolof;;ical 

 Society. 



Pegomyia subgrisea sp. n. 



Mdlc. — Black, ()i)aquo, densely gray pniincsccnt. Inlcrfroiitalia, anterior 

 margin of parafacial at base of antennae, anterior third of cheeks and apex 

 of second antenna! joint, rufous; palpi fuscous. Dorsum of thorax with 

 two faintly indicated linear dark submedian vittae on anterior half. Abdo- 

 men with a dark gray linear dorso-central vitta; sixth tergite, hypopygium, 

 and fifth sternite reddish testaceous. Legs reddish testaceous, fore femora 

 with a dark gray stripe on postero-dorsal surface, tarsi subfuscous. ^^'ings 

 clear, veins yellow. Calyptrae and halteres yellow. 



Eyes separated by about three times the width across posterior ocelli; 

 each orbit with three or four bristles on anterior half; parafacial at base of 

 antennae distinctly wider than third antennal joint, a little narrowed below; 

 cheek a little higher than widest part of parafacial; third antennal joint over 

 twice as long as second; arista with very short pubescence. Thorax with 

 one pair of strong presutural acrostichals; prealar much more than half as 

 long as the bristle behind it; post-humeral not duplicated; sternopleurals 1:2. 

 Abdomen cylindrical; hypopygiinn moderate in size; fifth sternite with the 

 ])rocesses of moderate length, rounded at apices, not (ihitinised, with micro- 

 scopic hairs and two or three downwardly directed setulae on inner margin 

 in apical half, and some long bristles on outer half. Fore tibia with an anlero- 

 dorsal and two posterior bristles beyond middle; mid femur with a strong 

 bristle near base and another beyond middle on antero-ventral surface, and 

 two or three bristles on basal half of postero-ventral; mid tibia with an anlcm- 

 V(>ntral, one antcro-dcjrsal, one postero-doi'sal and three or four posli'rior 

 bristles; hind femur with a sei-i<>s of five or six strcjng, widely-spaced bristles 

 on antero-ventral surface, and three or four on basal two-thirds of ])ostero- 

 ventral; hind tibia with two antero-vcnitial, two antero-dorsal and two 

 postero-dorsal bristles. Costal thorn longer than inner cross-vein, the setulae 

 longer than costal diameter; outer cross-vein nuich curved; last section of 

 fourth vein not longer than })receding .section. Length, S mm. 



Type.— d'; Bozeman, Montana, July 14, 1900 [lUinoisJ. 

 Diffei's from .//a/'/(Y///.s Stein in liavinj;- the a])ex of the abdomen 

 rcildjsli testaceous the mid (ibia with an ant(M-o-ventral bristle 



