﻿TABANIDAE — PART I. 115 



first and second joints of antennae greyish clove-brown (first joint in Q often 

 greyish chestnut-brown), first joint short, swollen distally especially in ^, first 

 and second joints clothed above with blackish and below with whitish hair, hair 

 on first joint much longer and denser in $ than in Q, third joint of antennae 

 clove-brown, with a prominent angle on upper margin of its expanded basal 

 portion, which (in Q at any rate) is broader than in S. decipiens, Lw. Thorax : 

 dorsum in $ with an exceedingly slender, median, grey longitudinal stripe (easily 

 overlooked) on its anterior half, and on each side of this a broader and more 

 conspicuous stripe running from front margin to inner extremity of lateral half of 

 transverse suture, beyond which indistinct continuations of both admedian and 

 median stripes can sometimes be perceived, the admedian stripes each widening 

 out into a rounded expansion midway between suture and prescutellar groove ; 

 dorsum of thorax in $ clothed with light grey hair, except between bases of 

 wings where there is a transverse band of dark brown hair, in front of which, to 

 a point midway between band and anterior margin of dorsum, brownish hairs may 

 be intermixed with the grey ones ; pleurae and pectus in $ slate-grey and 

 clothed with greyish hair ; dorsum of thorax in Q with five longitudinal grey 

 stripes, consisting of a broader pair on each lateral half, which extend from front 

 to hind margin and are obliquely connected by the grey transverse suture, and a 

 narrow median stripe, which also commences on front margin but becomes 

 indistinct soon after passing transverse suture ; admedian stripes in Q exhibiting, 

 as in tf, expansions midway between transverse suture and prescutellar groove ; 

 hairy covering of dorsum of thorax in Q similar to that in $ , but shorter ; 

 pleurae and pectus in Q fawn-coloured, greyish pollinose and clothed with 

 greyish-white hair. Abdomen : black median stripe on dorsum of $ often with 

 wide lateral extensions at base of second segment, in front of grey spots, 

 narrower on third and fourth segments, interrupted by the grey hind borders of 

 the second and third segments, and on each side indented more or less deeply by 

 the paired grey spots ; dorsum of first segment in $ black or clove-brown 

 except posterior angles, which are buff or cream-buff and, like lateral borders of 

 same segment, clothed with whitish hair ; dorsum of second and two following 

 segments in tf each with a pair of grey spots, contrasting more or less distinctly 

 with ground colour and connected with hind border, which is also grey and in 

 middle line expanded into a forwardly-directed triangle ; tergites of three 

 following segments clove-brown in tf , with hind margins narrowly grey or 

 isabella-coloured, fifth and sixth segments also each with a pair of grey spots, 

 and fifth segment in addition with a grey median triangle resting on hind margin ; 

 sides of tergites of second and two following segments in $ (except hind 

 borders) more or less dark brown and clothed with dark hair ; dorsum in c? 

 clothed mainly with dark brown or blackish hair ; hind border (including 

 posterior angles) of second segment, posterior angles of third and fourth segments, 

 and lateral margins of fifth and following segments clothed with whitish hair ; 

 venter in c? mainly buff, clothed with greyish-white hair, first segment slate-grey, 

 second segment with a large, quadrate, greyish clove-brown blotch in centre 

 (sometimes indistinct), resting on base but not reaching hind border, fifth and 

 following segments greyish clove-brown, hind margins of second and following 



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