178 NEW NORTH AMERICAN ANTIIOMYIIDAE (dIPTERA) 



This species resembles wintheini Meigen in habitus aiui size, 

 l)ut differs in color of ])ali)i, and armature of fifth sternite, tibiae 

 and thorax. 



Pegomyia fuscofasciata sp. n. 



l/„/(>__Dirfc>rs from the preceding species in having the head black with 

 the exception of the seciond antennal joint and base of third and the pulpi, 

 the thorax with the exception of the apex of scutellum black, and the abdo- 

 men with a narrow fuscous fascia on posterior margin of each tergite. 



Head as in preceding species, but the third antennal joint broader and 

 not so long. Thorax with posthumcral bristle duplicated and no small 

 adjacent hairs; sternopleurals 2:2, the lower anterior one weak, sometimes 

 absent. Abdomen depressed; tergites becoming progressively shorter to 

 fourth; hypopygium larger than usual, distinctly but not greatly protruded 

 ventrally; fifth sternite with the processes short, their inner margins with 

 erect fine hairs. Armature of legs as in triseta, but the hind tibia has two 

 postero-dorsal bristles. Veins three and four slightly convergent apically. 

 Lower calyptra very noticeably protruded. Length, 4.25 to 5 mm. 



Type.—d"; Barnstable, Massachusetts, July 5, 190(), [B. S. 

 N. H.]. Paratype. — Two males; Edgartown, Massachusetts, 

 June 28, (C. W. Johnson) ; one male, Southl)ridge, Massachusetts, 

 July 27, 1912. 



Most nearly related to triseta. 



Pegomyia spinigerellus sp. n. 



Male. — Brownish black, slightly sliining, with dense grayish jiruinescence. 

 Head rufous, occiput and parafacials partly gray; third antennal joint fuscous 

 except at base. Thorax not distinctly vittate; scutellum slightly testaceous 

 apically. Abdomen yellowish testaceous, dorsum infuscated except at apices 

 of tergites, with a poorly defined brown dorso-central vitta, the bristles and 

 hairs set in brown dots. Legs yellowish testaceous, femora slightly darker, 

 tarsi subfuscous. Wings clear, cross-veins narrowly infuscated. Calyptrae 

 and halteres yellow. 



Eyes separated by nearly the width across posterior ocelli; orbits linear 

 above, each with three fine bristles on lower half; parafa(ual at base of an- 

 tennae a little wider than third antennal joint, slightly narrowed below; 

 antennae extending about three-fourths of the way to mouth-margin, third 

 joint about L.5 as long as second; arista very long, second joint about as 

 long as thick, pul)escence very short; cheek higher than length of third an- 

 tennal joint, with a series of bristles on lower margin. Presutural acrostichals 

 short, two-rowed; post-humeral not duplicated, the area laterad of ])ost- 

 huineral bare; prealar absent; sternopleurals 1:2. Abdomen cylindrical; 

 hyi'opygiuin normal in size; fifth sternite with the processes short, rounded 

 apically, not glossy, with a few weak setulose hairs. lAn-e tibia with an 

 antero-dorsal and one or two posterior bristles near middle, tlu> apex witii 



