| OCR Text |
Show 1893.] ME. E. E. AUSTEN ON NEW DIPTEROUS INSECTS. 137 inner side nearly hyaline ; third vein gently curved above the the first posterior cell; in the o* the wings are narrower aud less rounded at the tips, while the terminal section of the fourth posterior vein, closing the first posterior cell, is less sinuate and more oblique than in the $ : alulas long, narrow7, posterior margin straight. Ceylon (Lieut.-Colonel Yerlmry). The typical specimens are from Kandy (circa 1800 ft.), the S collected June 28, 1892, the $ May 25, 1892. Common in the Central Province; one specimen from Baddegama, in the neighbourhood of Galle. This species is distinguished from any other known to me from the Oriental Region, by the marking of the abdomen, and the sharply-defined facial and antenniferous tubercles when viewed in profile. BACCHA BICOLOE, sp. n. (Plate IV. fig. 6, tf .) o*. Length 13 m m. Face and cheeks pale yellow, clothed with yellow pollen ; a small, round, bare, sharply-defined tubercle slightly below the middle of the face. Antennas yellow. Front brownish, yellowish pollinose on the sides, clothed with pale yellow pile. Vertical triangle black. Thorax dull brown, faintly pollinose on the dorsum ; shoulders and pleurae in front pale yellow; a conspicuous vertical stripe on the pleurae below the transverse suture yellowish white, pollinose; a similar, but somewhat duller, spot behind and below the base of the wings. Scutellum reddish brown. Abdomen : first segment yellow, blackish on the sides ; second segment yellow, brownish in the middle, and brown on the distal fifth ; third segment yellow for rather more than half its length, then metallic brownish black, with a somewhat V~shaped transverse brown mark on the yellow portion near the base of the segment, the apex of the V being directed forwards and the arms widely divergent; the remainder of the abdomen metallic prune-purple ; external genitalia yellow, not projecting beyond the fifth segment. The abdomen is spatulate from the commencement of the third segment, and on the dark portion is clothed with sparse and very short appressed black pile; elsewhere the body of this species is practically bare. T\\e first two pairs of legs yellow ; the posterior legs, except rather more than the basal half of the femora, which is yellow, pale brown ; on the posterior femora a narrow band at the commencement of the dark portion is darker brown than the remainder, and the posterior tibiae have the tips and an ill-defined band in the middle yellowish. Wings brown, paler at the tips, and with a small area at the base on the inner side nearly hyaline; the wings are rounded at the tip and show no angle at the junction of the costal vein with the hind margin ; the second longitudinal vein bends downwards before joining the costa, so that the end of the marginal cell is blunt, while the third longitudinal vein bends slightly upwards at its termination, and the terminal portion of the fourth longitudinal vein is very oblique, |
