274 8. W. WILLISTON, M. D. 



margin of the mesonotiini and the pleurae are yellowish red, the legs 

 are brownish red throughout, and the marginal cell is either closed 

 in the margin or narrowly open. 



Eleven specimens, Destares, Chapada and Rio de Janeiro. The 

 wings in both species vary in the depth of brown color on the outer 

 part. 



51. Voliicclla niiista n. sp. 



%. — Length 9 — 10 mm. Frontal triangle and face light yellow, with simi- 

 larly colored pile ; cheeks shining black, except behind. Autennpe reddish yel- 

 low, third joint rather short, not at all incised ; arista not densely, moderately 

 long, plumose. Facial concavity strong, tubercle hemispherical ; lower part 

 moderately acute, produced only a little forwards. Thorax light yellow, with 

 moderately abundant, light yellow pile ; me-sonotum, except the broad lateral 

 margins, and a spot on the meso- and sterno-pleurse, shining black. Scutellum 

 light yellow, the distal margin narrowly brown. Sides of the thorax and mar- 

 gin of scutellum with weak yellow bristles. Abdomen : first and second seg- 

 ments light yellow, the second with a linear median reddish striije, and a poste- 

 rior narrow blackish brown l>and ; the following segments each with a similar 

 posterior band, with the other parts yellowish, reddish, brownish, or blackish; 

 pile very short, chiefly blackish. Legs black, with short, yellow and black pile. 

 All the femora, except their distal fourth or fifth, light yellow. Wings lightly 

 tinged with yellowish ; the small stigmatic spot l)rown, the cell beyond it yellow ; 

 marginal cell closed in the border or narrowly open. 



Nine specimens, Chapada, November, January. The black of the 

 cheeks has an indication of a yellow bisection, and the black of the 

 mesonotum has, in one specimen, a distinct violet reflection. 



53. Volucella mns n. sp. 



% . — Length 9 — 10 mm. Frontal triangle small, light yellow. Antennae red- 

 dish yellow, of moderate width, not excised, longer than in V. musta ; arista 

 rather strongly plumose. Face yellow ; a median stripe, and one on the cheeks, 

 brown ; tubercle obtuse, below slenderly conical, produced forwards, the lower 

 border of the cheeks concave. Mesonotum coppery red, with strong violet reflec- 

 tions ; the lateral margins, and angular exi)ansion behind, yellow. Pleurae yel- 

 low and brownish red. Scutellum yellow ; red, with violet reflections across the 

 disk ; impressed before the tip. A black bristle on the upper part of the meso- 

 pleurae, a i-ow on the lateral margin of the scutellum. Abdomen yellow ; second" 

 segment with a blackish brown posterior band ; third with a similar band, send- 

 ing three slender prolongations to the front margin ; fourth with a median stripe 

 and an oblique lateral spot. Legs luteous, the tibia? and tarsi brownish. Wings 

 hyaline, with a yellowish tinge distally ; the subcostal cell beyond the small 

 brownish stigma yellow ; marginal cell closed and petiolate. 



9- — Front luteous yellow, with a brownish interrupted median stripe ; third 

 joint of the antennte a little broader. 



