1893.] "NFR. E. E. VrST EX ox NEW DIPTEEOUS INSECTS. 151 



Groitp III. 



Baccha ctlteata, sp. n. (Plate Y. figs. '^,d, S 2- •) 



5 . Length 12| mm. ; width of second abdominal segment 

 24 mm., of fourth abdominal segment ."3 mm., across the posterior 

 margin in each case. 



Head and thora.e ydlow, cent r(d jiort ion of dorsvut of thorax darlc 

 (jreenisli bronze, with three cinereoas poUinose stripes ; abdomen very 

 broad and flat, not contracted basalhj, but expanding regularly to 

 beyond the middle of the fourth segment, chestnut coloured, tvith 

 ochraceous bands and other marlings, a posterior band on the second 

 to the fourth segments shining bumf-sienna coloured ; first and second 

 pairs of legs wholly ochraceous ; posterior pair ochraceous rufous, with 

 an incomplete and ill-defined brownish band near the tips of the 

 femora, the tibice, except the base and tips, darh brown, and the tarsi 

 whitish yellou'. Wings large, broad, strongly suffused with ochraceous, 

 darl-est along the fore-border above and immediately below the second 

 longitudinal vein, and in the distal third of the sidmiarginal cell; 

 there is also a less darh area on each side of the sixth longitudinal 

 vein J second longitudinal vein considerably convex forwards in the 

 central portion of its course ; third longitudinal vein nearly straight, 

 terminal portion of fourth vein closing first posterior cell deeply 

 sinuate, but not very oblique: alulce about half the full size, with a 

 straight posterior edge : hnobs of halteres ferruginous. 



Face and cheel-s shining opalescent yellow ; facial tubercle low, 

 ochreous. Front orauge-ochraeeons, dull, the posterior fonrtli dark 

 olivaceous ; antenniferous tubercle shining yellow on the sides, 

 with a large quadrate shining black spot above the base of the 

 antennae ; from the ocelli, which are remote from the vertex, a 

 nari'ow dark median stripe runs forwards, but becomes faint and 

 nearly obliterated before reaching the siipra-anteniial spot, ybi- 

 /eHuce missing ; occiput yellowish pollhiose, with a fringe of pale 

 yellow hairs. Of the three cinereous pollinose stripes on the 

 thorax, one, which is very narrow, is in the median line, and is 

 separated by two narrow dark stripes from the other two cinereous 

 stripes, which are broader ; outside these is a very broad dark 

 bronze stripe on each side, which is divided by the trans\erse 

 suture ; the cinereous stripes are abbre\iated at about t\^•o-thirds 

 the length of the thorax, leaving the bronze colour to extend to the 

 scutelhan ; sides of the dorsum and pleuras metallic yellow, the 

 posterior poHioii of tlie pleura3 more steely; metanotum shining 

 bronze. hcut<-lhim raw-sienna coloured, yellower along the anterior 

 margin, moderately shining. Abdomen : first segment yellow on 

 the sides, orange-ochraceous in the centre, with the central ])ortion 

 of the posterior border dark brown ; second segment reddish 

 ochraceous at the base, and with a narrow and considerably curved 

 (posteriorly concave) ochraceous band across the middle ; this may 

 aj)pear to be narrowly interru|)ted \i\ the median line; third seg- 

 ment narrowly ochreous at the extreme base, and with a broad, 

 slightly curved ("postpriorly concave) ochraceous transverse band, 



