Diptera Brasiliana.
BY S. W. WILLISTON.
PART II.[11]
CONOPS.
| 1. | First basal cell hyaline | 2 |
| First basal cell clouded throughout | 6 | |
| 2. | Third joint of the antennae as long as the first two together; | |
| small species | parvus, n. sp. | |
| Third joint of the antennae but little if any longer than the | ||
| second joint | 3 | |
| 3. | First posterior cell hyaline | 4 |
| First posterior cell more or less clouded | 5 | |
| 4. | Cheeks yellow | angustifrons, n. sp. |
| Cheeks black | ornatus, n. sp. | |
| 5. | Face black in ground-color | argentifacies, n. sp. |
| Face yellow, large species | grandis, n. sp. | |
| 6. | Red species; front red | rufus, n. sp. |
| Black species; front black | 7 | |
| 7. | Face and cheeks black in ground-color | magnus, n. sp. |
| Face and cheeks yellow | inornatus, n. sp. |
1. Conops magnus, n. sp.
Female. Front black, shining, the vertical callosity somewhat reddish. Face and cheeks yellowish brown, the orbits silvery pollinose. Antennae brownish black; second and third joints subequal, first joint about two-thirds the length of the second; third joint of the style with a long bristly extremity. Thorax shining black; pleurae lightly whitish pollinose. Abdomen deep black, opaque; lightly whitish pollinose posteriorly; ventral process of the fifth segment large. Wings deep brown in front, extending through the two basal cells, and the basal part of the discal cell; outer part of the first posterior cell subhyaline, as also behind the streak corresponding to the spurious vein of the Syrphidae. Legs black; base of the femora, of the tibiae, and of the tarsi, somewhat yellowish.
Length 21-24 millimeters. Six specimens, Chapada, H. H. Smith.