162 KANSAS UNIVERSITY SCIENCE BULLETIN. 



shining black, anterior border yellow; fourth segment black, 

 an oval spot on each side opaque, just anterior to which is a 

 convex transverse grayish sheen ; fifth segment wholly shining 

 black. Femora, except extreme tip, posterior tibia? centrally, 

 shining black ; tips of tarsi fuscous ; otherwise the legs are yel- 

 low. Wings hyaline, marginal cell closed in wing margin. 

 Length, 10 mm. 



One specimen ; December. 



Eristalis communis, n. sp. 



Male : Eyes pilose above, with five vertical, blackish brown 

 stripes, facets on upper half of eye larger than on lower ; ver- 

 tical triangle black, subshining, with black pile, frontal tri- 

 angle black, subshining in the middle, yellowish gray pollinose 

 on sides, pile of sides yellowish, of the middle black ; face 

 black, yellowish gray pollinose, a short median line over facial 

 tubercle, and one on each side of face shining, pile yellowish ; 

 cheeks yellow, subshining, pile light yellow; occiput black, 

 light gray pollinose, pile almost white ; antennse black, lower 

 margin, and arista, yellowish, latter bare. Thorax brownish 

 pollinose, with four bronze, subshining vitti3e, pile yellowish ; 

 scutellum yellowish translucent, broadly on base and margins 

 yellow pilose, black pilose centrally ; halteres yellow ; pleurae 

 subshining. First segment of abdomen yellow, grayish cen- 

 trally ; second segment yellow, the basal black border not very 

 broad, attenuated laterally, apical black border likewise not 

 very broad, scarcely attenuated laterally, shining on posterior 

 edge, a light brown spot in center segment ; third segment yel- 

 low, apical third blackish violaceous, largely shining and ex- 

 tending forward slightly in center ; fourth segment wholly 

 blackish violaceous, brownish pollinose and opaque basally ; 

 hypopygium shining blackish violaceous ; venter yellow, second 

 and third segments each with three brownish spots, fourth 

 segment blackish. Femora and hind tibise shining metallic 

 fuscous ; tip of anterior tibiae and last three joints of all tarsi 

 fuscous, otherwise tibite and tarsi yellowish. Wings hyaline. 



Female : Pile of front largely black. Apical half of third 

 abdominal segment blackish violaceous, on basal half is a trans- 

 verse, grayish pollinose band ; fourth segment also with a simi- 



