SYNOPSIS OF NORTH AMEEICAN SYRPHID^. 45 



black ; the small auterior augles of tlie third segment, and the fourth 

 segment, except a median stripe dilated in front and not reaching the 

 hind border, shining black. Legs wholly black. Wings with a yellow- 

 ish tinge; veins yellowish, blackish on the outer part. 



One specimen. 

 Chilosia pai-va. (Plate II, tig. 1:?.) 



Cheilosia parva Williston, Proc. Am. Phil. Soc, xx, 307, 1882. 



MeUinoyai^ter ochripes Bigot, Aiinales Soc. JEut. Fr., 1884, 555. 



Habitat. — Oregon !. 



9 . Length, 5"™. Shining metallic green, with a brassy reflection. 

 Eyes bare. Front with short blackish pile. Face slightly excavated 

 below the antenna, the tubercle large, obtuse, the epistoma much less 

 protuberant. Thorax with short, sparse, lutescent pile. Abdomen 

 broadly oval ; wholly shining, nearly bare, whitish pubescent toward 

 the end. Legs reddish yellow ; the tibiae with a small brownish ring, 

 and the terminal joints of the tarsi brown 5 sometimes the anterior fe- 

 mora at the base, the hind femora in large part, and larger rings of the 

 tibiae, brown or blackish. Wings brownish; stigma luteous; veins 

 black, yellowish at base. 



Four specimens. 



Chilosia lugubris, u. sp. 



Habitat. — California !. 



$ . Length, 8 to 10""". Deep black, moderately shining. Antennae 

 small, black, the third joint reddish brown, nearly rectangular above, 

 rounded below; arista black, plumose. Face shining, lightly pollinose, 

 gently concave on upper part. Frontal triangle large, black pilose. 

 Thorax with considerable black pile ; on the margin of the scutellum 

 with tine bristly hairs. Abdomen wholly shining, with light-colored 

 pile. Legs black, the knees very narrowly yellowish. Wings with a 

 blackish tint ; before the humeral cross-vein quite dark, veins black, 

 stigma yellowish. 



Two specimens. The posterior part of the second and third abdom- 

 inal segments are less metallic or sub-opaque. The eyes are bare. The 

 pile of the thorax, when seen from behind, seems mostly black, from 

 in front, luteous. ^ 



Chilosia leucoparea. 



Chilosia leucoparea Loew, Centiir., iv, 69. 

 Habitat. — Carolina (Lw.). 



9 . Length, 6.5""". Black; eyes bare, antennae red, arista very briefly 

 pubescent; face below on each side light colored; humeri light colored; 

 margin of the scutellum testaceous, provided with bristles ; legs lute- 

 ous, femora, except the tip, black. Black, moderately shining; pile 

 short and not abundant, on the disk of the abdomen and at the tip 

 blackish, elsewhere whitish ; pile of the vertex a little longer, black. 

 Front narrow, plane. Antennae wholly red, third joint rounded oval; 

 arista black. Face black, shining, above strongly excavated, below 



