378 COQUILLETT 



polished, the narrow sides, occiput, cheeks and face, except middle of 

 the upper part of the latter, opaque, gray j^ruinose; two pairs of 

 fronto-orbital bristles, no medio-frontal macrochajta below the ocelli ; 

 antennal arista bearing a short pubescence on the upper side ; body 

 polished, thorax bearing five pairs of dorsocentral bristles, scutellum 

 bearing four bristles ; wings hyaline, spines of costa only slightly 

 longer than the diameter of the costal vein ; front tarsi of male not 

 swollen; length, 4 to 5 mm. Albemarle, February 13. One male 

 and five females. 



Type. — Cat. No. 4429, U. S. National Museum, 



CANACE SNODGRASSII sp. nov. 



Black ; the palpi, halteres and tarsi yellow ; front polished ; four 

 pairs of fronto-orbital bristles, and a short distance toward middle of 

 front from these a row of three or four bristles ; occiput, cheeks, face 

 and clypeus opaque, light gray pruinose ; two stout bristles in the vibris- 

 sal region and one slightly above and behind the center of each cheek ; 

 antennal arista almost bare ; eyes slightly longer than high ; cheeks pos- 

 teriorly as wide as the eye-height ; body subopaque, thinly grayish prui- 

 nose, the pleura densely light gray pruinose ; five pairs of dorsocentral 

 bristles ; scutellum bearing four marginal bristles and a smaller discal 

 pair; wings grayish hyaline ; length, 3 mm. Albemarle, January 23; 

 and Narboro, January 13 and 26. Many specimens. 



Type. — Cat. No. 4430, U. S. National Museum. 



Family OSCINID^. 

 HIPPELATES PUSIO Loew. 

 HippelatiS pusio Loew, Berl. Ent. Zeitsch., p. 279, 1872. 



Tagus Cove, Albemarle, March 23. Three specimens. Also oc- 

 curs in this country, ranging from Massachusetts southward to Florida 

 and Texas. 



Family AGROMYZIDiE. 

 RHICNCESSA COSTALIS sp. nov. 

 Head black, opaque, gray pruinose ; lower half of front yellowish 

 brown ; face and cheeks yellow ; antennae brown ; pubescence of arista 

 very short ; proboscis brown ; palpi yellow ; body black, opaque, gray 

 pruinose, mesonotum marked with two indistinct brown pruinose 

 vittae ; four pairs of dorsocentral bristles ; legs yellow, the coxae and 

 front legs dark brown ; wings grayish-hyaline, the costal margin be- 

 tween apices of first and second veins brown, sometimes encroaching 



