120 SYRPHID.?:. 



the hind margins of the wiugs brownish-tinged, as stated by 

 Major Austen. 



Types in British Museum. 



101. Baccha amphitlioe, Wall-. (PI. Ill, fig. 12.) 



Bacclia amphitlioe, Walker, List Dipt. Brit. Mus. iii, p. 549 (1849). 

 Baccha Jiavopunctata^ Brunetti, Eec. Ind. Mus. viii, p. 165, pi. vi, 

 tigs. 5, G (191.3) ; id., op. cit. xi, p. 219, 



(5 $ . Head : vertex and frons shining metallic black, a little 

 vellow on lower part of frons at sides bearing 3'ellow dust : iu 5 5 

 an indistinct narrow median line on frons. Antennae orange- 

 yellow, antennal prominence hardly noticeable. Face and cheeks 

 yellovv, a clear-cut blaclv or blue-back stripe on face from antennae 

 to mouth ; a small tubercle on face : below mouth-opening shining 

 steel-colour. Occiput dark grey- or yellow-pollinose, with short 

 whitish-yellow fringe on margins. Thorax dark seneous to metallic- 

 black, with short golden-yellow pile; yellow calli on humeri, an 

 oblougone thence to suture ; a perpendicular oblong stripe on meso- 

 pleura ; a round spot just below it on steruopleura ; a long oblique 

 «pot behind wings, with a small round spot contiguous to its lower 



Fig. 25.— Baccha amphithoe, Walk., abdomen. 



-end. Scutellum yellowish, brownish in middle, with some grey 

 pubescence. Abdomen : 1st segment pale yellow ; 2nd very 

 narrowed, pale brown, witli a yellowish band before hind margin ; 

 3rd yellowish at base with a reddish-brown triangular patch ou 

 each side margin, more distinct in $ , and reaching hind margin, 

 which latter bears a sharply defined blackish band ; middle of 

 segment yellowish ; 4th segment yellowish ; basal angles, sides 

 and a large, rather triangular spot resting on hind margin, black ; 

 the sides of this segment are addicted to curHng under the belly ; 

 5th segment with a blackisii median basal spot, indistinct in 6 . 

 Venter more or less as dorsum. Legs: coxae black ; anterior legs 

 (except coxae) wholly bright yellow down to tips of tarsi ; a 

 broad median band on hind femora, and the apical half of hind 



