64 Psyche [April 



to near the oral margin, just above the oral margin a narrow horizontal 

 groove; arista plumose; deep shining black throughout, the third antennal 

 joint and four posterior tarsi reddish. W. Ind., S. Am. (Fig. 11.) 

 Xangelina nigra Williston. 



23. Face glistening beneath the antennae; third antennal joint four times as long as 



wide, dark; legs black, except knees and posterior tibise and tarsi. Eur., N. 



Scot., Wash.* : Caliope elisse Meigen. 



Face pollinose immediately beneath antennse; third antennal joint three times 

 as long as wide, often reddish; legs entirely yellowish. Cal., Vane, Wash.*, 

 Id.* {livingsioni Coquillett) Caliope quadrisetosa Thomson. 



24. Some of the abdominal segments marked with spots; thorax opaque gray prui- 



nose 25 



Abdomen not regularly spotted 31 



25. Arista long-plumose 26 



Arista short-pubescent; mesonotum with four fuscous \'itt3e, scutellum with 



two fuscous dots; front bivittate; abdominal segments with four series of 

 brown spots; legs yellow 30 



26. Abdominal segments yellow, marked with pairs of blackish spots; thorax not 



vittate; scutellum cinereous black 27 



Abdomen largely black 28 



27. Lower part of pleurae yellow; 2 dorsocentrals and 1 stemopleural. Kans. 



Minettia crevecoeuri Coquillett. 



Pleurae concolorous with notum; 4 dorsocentrals and 2 sternopleurals. Md. 

 Minettia glauca Coquillett. 



28. Abdomen largely blackish, base and tip yellow, dull with thick cinereous coat- 



ing; thorax uniformly cinereous, but humeri and scutellum yellow; 4 acros- 

 tichal rows; legs yellow; last sections of fourth vein subequal. Wash.* 



Minettia univittata var. 



Abdomen polished; thorax vittate ^vith brown; scutellum largely or wholly 

 black 29 



29. Abdomen black, base and tip yellow, each segment with lateral gray pruinose 



spots; legs whitish; thorax with four vittae; face whitish; hind cross vein 

 broadly brown; cross veins approximate. Nicaragua. 



Minettia albipes Coquillett. 



Abdomen black with hind margins of segments brownish and pollinose, fifth 

 segment with four gray pruinose spots; legs black except tibite and most of 

 tarsi; thorax with three vittae; cheeks with black spot. Nicaragua, {varia 

 Coquillett.) Minettia variata Hendel. 



30. Abdominal segments marked with four brown spots; femora not with patches 



of setulae; antennae often black at base; cheeks ^-ith large blackish spot; 

 Pa., N. J., N. H., Can.; Tenn., Mich., Wise. Aldrich. 



Minettia quadrilineata Loew, 



Abdominal segments marked with many small brown setigerous spots; front 

 femora with a row of minute setulae on distal part of flexor surface; antennae 

 yellow. Me.*; Tenn., Wise. Aldrich; Wash.*. .Minettia annulata sp. nov. 



31. Face silvery pollinose on a brown ground; thorax and abdomen shining bluish 



