366 Mr. A. G. Butler on new Species of Sesia. 



(5 millimetres) and narrowing gradually to external angle 

 m millimetre), strongly dentated internally between the 

 nervures, as in S. fuscicaudis (Hcemorrhagia fuscicaudis of 

 Grote) ; a reddish diffused apical subcostal streak upon external 

 border; interno-basal area dark chocolate-brown, clothed at 

 the base with testaceous hair-scales; secondaries with the 

 base and abdominal margins broadly dark chocolate-brown, 

 the costa smoky brown ; outer margin rather broadly bordered 

 with dark chocolate-brown, denticulated internally : wings 

 below nearly as above, but paler : head and thorax clothed 

 above with sordid testaceous hair-scales ; abdomen dark choco- 

 late-brown, basal segments clothed with testaceous hair-scales ; 

 the two preanal segments yellow [the upper one slightly, 

 the lower one distinctly brownish in the centre *] ; anal 

 tuft blackish ; antennas black ; palpi above black, below 

 pale sulphur-yellow ; pectus pale sulphur-yellow ; legs black ; 

 venter black ; two preanal segments with a yellow tufted patch 

 on each side. 



Expanse of wings about 48 millimetres. 



Hob. Texas {Belfrage). Type, B.M. 



Allied to S. axillaris , Grote and Robinson, and S. radians , 

 Walker. 



Sesia alternata, n. sp. 



Wings above hyaline, nervures black ; primaries with costa 

 and interno-basal area black, clothed with testaceous hair- 

 scales ; outer margin broadly chocolate-brown, twice as wide 

 at costa as at external angle, strongly dentate-strigate in- 

 ternally, the dentes being even more developed than in S. 

 radians ; secondaries with costa greyish testaceous, yellowish 

 at base ; base and abdominal margin dark brown, varied with 

 testaceous hair-scales ; outer margin chocolate-brown (1 milli- 

 metre wide), an interno-median decreasing streak projected 

 from anal margin : wings below with the brown borders 

 redder than above ; internal margin of primaries cream- 

 coloured : head and thorax densely clothed with yellowish 

 olivaceous hair-scales ; eyes encircled with white : abdomen 

 clothed with bright testaceous hair-scales, becoming yellowish 

 tawny towards the middle ; two central segments black-brown, 

 with a sprinkling of tawny scales internally t; anal tuft 

 tawny testaceous in the centre, blackish varied with testa- 

 ceous at the sides ; palpi above dark brown, below yellowish 



* I think it possible that this may be due to staining ; but it looks 

 natural enough. 



t In the type there is a dorsal brown streak ; but as it disappears 

 irregularly on the antepenultimate segment, I believe it is due to rubbing. 



