144 MR. E. E. AUSTEX ON NEW DIPTEROUS INSECTS. [Jan. 17, 



closeh'', and may be identical, but Doleschall does not mention 

 the black stripe oa the face, while he states that the abdomen of 

 his species has three transverse black bands. 



Baccha sulica, sp. n. (Plate IV. fig. 3, 5 •) 

 5 . Length 9 mm. 



Face and clieehs pale yellow pollinose, Avith a small but sharply- 

 defined facial tubercle. Front metallic blue, with a pollinose 

 stripe on each side on the lower two-thirds. Antenme yellow ; 

 first two joints very small, third joint ovate, large. Thorax 

 dark brown on the disc and below the base of the wings ; 

 pale yellow on the sides in front, and with a pale yellow 

 pollinose vertical stripe on the pleurae below the suture, and a 

 similar spot behind the base of the wings. ScuteUum yellow. 

 Abdomen spatulate, but not excessively attenuate at the base : 

 first segment yellow ; second segment yellow, brown on the distal 

 fifth and indistinctly brownish in the middle ; third segment 

 yellow for rather more than half its length, then metallic purplish 

 dark brown, a transverse brown band on the yellow portion ; the 

 remainder of the abdomen metallic purplish dark bi'own. With the 

 exception of a few outstanding pale yellow hairs on each side of 

 the first abdominal segment, the body of this species is nearly bare. 

 Ler/s pale yellow, the posterior tibise and tarsi brownish, and a 

 narrow brown band on the distal half of the posterior femora, 

 not reaching to the ti])s. Wings with a brownish tinge ; the sub- 

 costal cell, from the junction of the auxiliary xehx with the costa, 

 pale brown ; the A^-ings are blunt at the tips : aluli-e rudimentary. 



8ula Is., Malay Archipelago ( Wallace) : one specimen ; a second 

 specimen is from Mysol ( Wallace). 



In the markings of the abdomen this species somewhat resembles 

 Baccha moluccwia, Doleschall (Natuurk. Tijdschr. Ned. Ind. xiv. 

 p. 412, pi. iii. fig. 2), from Amboina, which, however, is at once 

 distinguished by its black scutellum, as well as by its greater 

 size. 



I found the type of this species labelled "siiUca" in Walker's 

 handwriting, but I cannot discover that it has ever been described. 



Baccha sagittifera, sp. n. (Plate IV. fig. 14, $ .) 



$ . Length 8 1 mm. 



Pufplish black, nearly bare, jilevrce and abdominal markings 

 yelloiv ; those on the fourth abdomincd segment sagittate. Abdomen 

 spatulate posteriorly, cylindrical, but stout,, to end, of third segment. 

 Wings suffused ivith brotvn at the tips ; cdulce apparently wanting. 



Face and cheeks pale opalescent yellow ; oral margin brighter 

 yellow ; a well-marked facial tubercle, below which the face recedes. 

 Front yellow, with a black median stripe extending from the vertex 

 to the base of tlie low antenniferous projection ; the latter brassy, 

 with a shining black dot in the median line immediately above the 

 antenufe ; antennae orange, very small, short, tliird joint oval, 

 darker above. Post-alar callosities pale yellow, pleurae brassy 



