June, 1914.] 
Diptera of Middle America. 
339 
and one before the scutellum; wing largely hyaline and brown, 
base largely hyaline, anterior border pale yellowish, first basal 
cell with a small oblique dark marking; a large dark marking at 
stigma sending out three prominent extensions, one backward 
along the veins which close the second basal and anal cells, another 
obliquely along the vein which separates the second and third 
posterior cells and one outward along the costa. The first second 
and third posterior cells also have more or less dark color at 
their apexes. Legs dark with the exception of the apical two- 
thirds of each front femur and all the tarsi which are pale. 
Abdomen very dark shining green. Type female from Bartica, 
British Guiana, collected by H. S. Parish. 
Volucella macula Wiedemann. General color metallic red¬ 
dish, wings nearly hyaline with a well defined quadrate black spot 
near the middle of the costal border. Length 9 mm. Four 
specimens from Bartica, British Guiana. 
Volucella obesa Fabricus. This is the most common species of 
the genus in middle America. Body shining green, wings nearly 
hyaline with a black stigmatic spot and a black point at the apex 
of the marginal cell. Length 12 mm. one specimen a little smaller. 
Our collection contains specimens from Mexico, Cuba. Guatemala, 
Honduras, British Guiana and Bolivia. 
Volucella perlata n. sp. Face and front bright shining green. 
Thorax bright green, scutellum and abdomen pale with shining 
irridescent reflections, wings yellowish, more intense on apical 
half. Length 9 mm. 
Face produced largely downward, green, and obscure yellow 
markings on the cheek, antenna including the arista yellow, eyes 
hairy. Thorax green, scutellum pale with an apical depression, 
three weak bristles on each side; legs dark with purplish or green¬ 
ish reflections, knees pale; wings yellowish, most intense in the 
marginal and first second and third posterior cells. Abdomen 
pale with a very bright, shining irridescent reflection. Type male 
taken at Los Amates, Guatemala. 
Volucella picta Wiedemann. Very close to fasciata and 
pusilla from the United States. In fact Williston suggests that 
the latter may be a synonym of picta. Length 8 mm. Speci¬ 
mens from Gualan, Guatemala. The larva probably lives in the 
stems of some species of cactus. 
Volucella praescutellaris Williston. A modest colored species. 
Dorsum of thorax green with yellow and black pile intermixed, 
scutellum pale, a row of prescutellar bristles and eight rather 
strong bristles on the posterior border of the scutellum; wings 
infuscated, not quite so dark on posterior border; legs black; ab¬ 
domen yellow and brown, the tip shining. Length between 11 and 
12 mm. A male specimen from Los Amates, Guatemala. 
