. African bombyliidae. Bombyliidae; Diptera. 42 Bulletin American Museum of Natural History [Vol. LVII Systropus rex, new species Length, 16 mm. Female.—Head wine-red, the occiput lalack; sides of face and the cheeks, silvery white. Frontal triangle long, slender, much narrowed to about two-thirds the distance to the ocelli but the eyes very distinctly separated. Narrow portion of the front brownish, the occiput gray pollinose except along the broad upper orbits; pile wholly black, very short above. A dense tuft of short black pile on the brownish, rectangular, median portion of the face. Ante
. African bombyliidae. Bombyliidae; Diptera. 42 Bulletin American Museum of Natural History [Vol. LVII Systropus rex, new species Length, 16 mm. Female.—Head wine-red, the occiput lalack; sides of face and the cheeks, silvery white. Frontal triangle long, slender, much narrowed to about two-thirds the distance to the ocelli but the eyes very distinctly separated. Narrow portion of the front brownish, the occiput gray pollinose except along the broad upper orbits; pile wholly black, very short above. A dense tuft of short black pile on the brownish, rectangular, median portion of the face. Antennae five mm. long, the first segment as long as the other two combined, ferruginous, the second segment of the same color but appearing black on account of the dense black hair, its length about three-eighths that of the black third segment which is strongly narrowed apically, leaving the stylus longer than wide. Palpi reddish, slender, tapering. Mesonotum slaty black, with a pair of very broadly separated broad, darker vittîc on the anterior half; a broad, tapering, lateral yellow stripe extends from the humerus to the suture on either side; notopleura reddish. Hair of mesonotum ex- tremely short, black, but there is a triangle of sparse, yellowish tomentum in front of the scutellum, and the hair on the lateral margins is longer. Scutellum transverse, with broadly rounded corners, the base with a reddish triangle on either side, the hair short, yellowish on the basal half, longer and black apically. Pleura black, with very short, ap- pressed, black hairs; a broad reddish stripe extends from the middle coxse to the base of the wing. Coxae, anterior four femora and their tibiae, except behind, rusty reddish, the femora slightly darkened anteriorly. Anterior four tibiae and first segment of their tarsi, whitish yellow behind, the latter reddish in front, the remaining tarsal segments blackish. Posterior femora reddish brown on almost the basal half, thence whitish yellow exce
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