288 Journal New York Entomological Society. [Vol. xxi. 



Stout, mottled with black and yellowish ; head yellow, the cheeks, sides of occi- 

 put and center of front marked with black ; mesonotum centrally 

 cinereous black, with setigerous brown spots ; the pleural sutures and 

 base and apex of the scutellum testaceous ; abdomen black, except at 

 base and on incisures ; femora black except at end, tibise with three 

 brown rings ; wings hyaline, the cross-veins and a spot on the fourth 

 vein brown. 3.5 mm. Cal.* (Proc. Ent. Soc. Wash., VI, 191, 1904.) 



pictus Coquillett. 



SPILOCHROA Williston. 



Gray pollinose, head, thorax, antennae and legs testaceous ; abdomen brownish 

 black, irregularly mottled with white pubescence and with sparse 

 black hairs ; wings largely infumated, the base and numerous rounded 

 or quadrate spots hyaline (see fig. 3, page 297, Williston's Manual, 

 3 ed.) ; ocellar bristles large, distant one third the width of the front; 

 costa with short spines. 2.5 mm. (Fla., W. Ind.*) (Peratodicrtus 

 (Heterochroa) ornatus.) ornata Johnson. 



GEOMYZA Fallen. 



Wings with apical spot and both cross-veins brown ; mesonotum shining red ; 



legs yellow 2. 



Wings with at least the anterior cross-vein not bordered with brown 3. 



2. Legs entirely yellow ; metanotum red ; female abdomen reddish, with brown 



bands, male abdomen sometimes reddish at base. 3-4 mm. (Eur. ;* 



U. S., in Hough Coll.) combinata Linnaeus. 



Hind femora with more or less evident preapical brown ring ; metanotum 

 blackish ; abdomen black, of the female reddish at tip. 3 mm. 

 (Alaska, Wash.,* Id.,* Wyom., Cal.*) (Balioptera.) ... .lurida Loew. 



3. Legs entirely yellow ; mesonotum shining red ; posterior cross-vein clouded 



with brown ; abdomen of female shining black. 4 mm. (Eur. ; Cal.) 



venusta Meigen. 

 Hind legs largely brown ; mesonotum blackish ; both cross-veins unclouded ; 

 apex of abdomen of female reddish. 3 mm. (Cal.,* Wash.*) 



monostigma new species. 



Geomyza monostigma new species. 



Female. — Length 3 mm. Largely blackish, shining. Back of head blackish, 

 the anterior half of the front, the face, cheeks, antennae and mouth testaceous ; 

 arista plumose above, pubescent below. Mesonotum blackish, except the 

 humeri and sides ; scutellum reddish ; metanotum black ; pleurae dark brown, 

 the sutures broadly reddish. Abdomen black, the apex reddish. Legs dull 

 yellowish, the outer half of the hind femora, and a basal and apical broad ring 

 of the hind tibiae fuscotis. Halteres white, the stem black. Wings clear hya- 

 line, the humeral and costal cells blackish ; at the tip of the marginal cell, 

 extending across the end of the third vein, is an apical blackish spot ; cross- 

 veins not marked with a dark spot. 



