1913] Miiandcr — A Synopsis of the Sapromyzidae 65 



black, the pleurae brownish; femora blackish, tibire brownish, tarsi whitish. 



5.3 mm. S. Am., W. Ind. Minettia argyrostoma \Yiedemann. 



Other^\'ise ; if the face is silvery the thorax is pollinose 32 



32. Arista pubescent or bare 33 



Arista plumose 36 



33. Body very slender; black, thorax gray pruinose, legs brown, the posterior 



tibise and tarsi yellow; antennae yellow, arista bare; wings four times the 

 length of the abdomen. N. H., Alaska. 



Minettia brachystoma Coquillett. 



Third antennal joint partly blackish, arista pubescent 34 



34. Mesonotum trivittate; front with median brown vitta 35 



Mesonotum and scutellum uniformly dusted; front shining black except a yel- 

 low anterior fascia, face silvery-dusted; legs blackish. Wash.* 

 Minettia nigrans sp. nov. 



85. Face silvery white; center of scutellum brownish; abdomen black; femora 

 blackish, tibiae brownish, their base yellow, tarsi more or less yello-nish. 



St. Vincent Minettia exul Williston. 



Face with small brown spot each side of center; scutellum gray-pruinose; 

 3 dorsocentrals of which one is presutural, 2 acrostichals, 2 sternopleurals; 

 venter yellow, dorsum of abdomen fuscous; base and middle ring of tibiae 

 yellow. 2.5 mm. Ga.; Tenn. Aldrich Minettia vittigera Coquillett. 



36. Wings blackish at base; halteres black; thorax opaque black; abdomen black. . 37 

 Root of wing not blackened; halteres yellow; thorax grayish pollinose or sub- 

 shining 38 



37. Front less broad, face shorter and less convex, abdomen shining. Can., Pa., 



N. J., N. H Minettia obscura Loew. 



3 dorsocentrals, 6 rows acrostichals; abdomen subshining, grayish pollinose. 

 Eur., Mass., N. J.*, Me.*, Pa.*, Que.*, Ont., 111.*; Wise. Mich. Aldrich. 

 Minettia longipennis Fabricius. 



38. Mesonotum very lightly gray pollinose, shining; 3 dorsocentrals, 4 acrostichals; 



head shining black. Eur., N. Am. (frontalis Loew). 



Sapromyza hyalinata Meigen. 



Mesonotum and head opaque 39 



39. Mesonotum opaque gray pollinose, ■\\-itli lateral margins brownish; strikingly 



marked with brown setigerous spots; 2 dorsocentrals, 1 sternopleural ; scutel- 

 lum gray pruinose; abdomen polished black, somewhat brassy. Fla., Cuba, 



Aldrich Minettia cineracea Coquillett. 



Mesonotum not marked with brown spots 40 



40. Mesonotum vittate; abdomen largely or wholly black 41 



Mesonotum densely cinereous pruinose, not vittate 42 



41. Mesonotum blackish, almost opaque, with two narrow gray vittae, scutellum 



black, abdomen reddish terminally; head yellow; legs light yellow. W. Ind. 



Sapromyza puella Williston. 



Mesonotum opaque black, with four white-pollinose vittae; scutellum black 

 with white-pollinose margin; abdomen thinly gray-pollinose, shining at apex; 

 head black. W. Ind Minettia albovittata Loew. 



