302 SYRPHID^. 



the concolorous yellow scutellum, whio.h Las onlj^ a trace of au 

 elongate blackish transverse spot but bears obvious black pubes- 

 cence. Plfuroe black, with a little obvious line pale pubescence, 

 rather longer than usual. The usual spots on mesopleura and 

 steriiopleura, the former vv'ith a contiguous sniall pre-alar spot. 

 Abdomen black ; 2ud and 3rd segments each with a pair of trans- 

 verse, narrow, linear spots distinctl}' behind anterior margin, well 

 separated in the middle line but not reaching side margins, placed 

 not qLiite in a straight line. Abdominal pubescence black, that 

 at tile base brownish or yellowish. A'enter black, yellowish at base, 

 3rd segmenl with a pair of large transverse yellowish spots ; 

 similar, smaller ones on 4th segment. Legs orange, front tibiae 

 more yellowish ; basal half of femora blackish. Wings grey, 

 rather yellowish-brown on about anterior third; blackish in 

 stigniatic region and anteriorly on about apical half. Halteres 

 and squamae orange. 



Length, 14 mm. 



Described from the type <S (without antennae), and a $ in good 

 condition from \i'im\vi{Sluden), both in the British Museum. The 

 locality from which the type was obtained was recorded simply 

 as " India orientalis." 



231. Chrysotoxum violacemn, sp. no v. 



(S ?. Head: eyes in c? contiguous for fully half the distance 

 from vertex to frons, with short whitish pubescence on upper 

 part, rest almost bare ; vertical ti'iangle blackish with long black 

 hairs curved forw ard and a little grey dust at sides. Frons shining 

 black, except the very narrowly yellow-dusted space contiguous 

 Avith eye-margins ; bearing long black hairs. Antennae black, 

 3rd joint as long as 1st and 2nd together, arista brownish-orange; 

 anteniial prominence shining black. I^ace very shining bright 

 chrome-yellow, with brownish-yellow pubescence; a median bare, 

 shining black stripe nearly one-third the width of the face. A 

 bare moderately broad shining black stripe from lower corners of 

 eyes to mouth-border, behind this stripe pale orange-yellow with 

 short yellow pubescence. Proboscis black. Occiput with yel- 

 lowish-white tomentum and a complete fringe of yellow hairs 

 except where the black hairs replace them behind vertex. In 5 • 

 frons less than one-fifth of head at vertex, widening gradually so 

 that the face below the antennae is twice that width, thence sides 

 of face parallel. Eyes with only the sparsest very short white 

 pubescence. Vertex with a large deep violet-black spot, between 

 which and the antennal prominence are two obvious but not con- 

 spicuous pale yellowish-grey dust-spots, contiguous with eye- 

 margins, nearly meeting in middle line and continued narrowly 

 by eye-margins to the bright shining chrome-vellow face, which 

 latter bears short soft yellow pubescence. A median, moderately 

 broad shining bare black stripe from base of antennae to tip of 



