Geneva and Species of Blood- sucking Muscidce. 287 



tip, being oraige-bvff or ochraceous-huff, instead of dark 

 chestnut-brown ; dorsum of abdomen with a narrow, dark 

 brown, median, longitudinal stripe, and more or less distinct 

 dark blotches on hind borders of second and third segments. \ 

 Head: face and front yellowish silveiy in (^, darker, 

 shimmering yellowish in ? ; in both sexes jowls yellowish 

 grey, occiput grey ; frontal stripe Avaluut-brown, in ^ verv 

 narrow, about half as broad again as orbits, its sides straight 

 and parallel, in i^ rather less than twice as broad as orbits, 

 widening very slightly below, its sides straight ; proboscis 

 slightly deeper at base in ^ , labella shining clove-brown on 

 outer side ; palpi buff, agreeing with generic diagnosis, 

 clothed on outer side with black bristles ; antennce similar 

 to those of S. maculosa, first and second joints and base of 

 third joint on inner side below cinnamon-rufous, remainder 

 of third joint dark brown, greyish in certain lights, arista 

 dark brown, with 12 hairs. Thorax : markings on dorsum 

 dark brown to dark cinnamon-rufous, somewhat lighter than 

 in S. maculosa, but precisely similar to those in that species 

 in general arrangement, median stripe in (^ only visible 

 behind transverse suture, and not reaching inner dorso- 

 central bristles, median stripe in $ apparently entire, ex- 

 tending from front to hind margin ; scutellum yellowish at 

 tip, and also in centre of disc in case of c^ , in which it is 

 also slightly brownish in centre of base, when viewed at a 

 low angle from behind (scutellum of type of ? damaged). 

 Abdomen : median dorsal stripe commencing on first segment 

 close to hind margin, broadest on second segment, becomino- 

 successively narrower on following segments, extremely 

 slender (linear) on fourth segment in ^ , indistinctly iutei'- 

 rupted on hind margins of second and third segments, and 

 not reaching hind margin of fourth segment; hind margin of 

 first segment somewhat infuscated, at least in $ , dark brown 

 blotches on hind borders of second and third segments not in 

 contact with median stripe, but situated one on either side 

 of middle line, between median stripe and lateral margin, 

 much more distinct and larger in $ , in which they are 

 roughly triangular and extend forwards beyond middle of 

 segment, in (^ less deep, ill-defined and dying away in front 

 on second segment, and on third segment forming an inter- 

 rupted transverse band ; skin clothing venter bright buff- 

 yellow, small median oval scutes grey. Wings: in J, vena- 

 tion and opening of first posterior cell precisely as in S. macu- 

 losa c?; in ? , bend of fourth longitudinal vein somewhat 

 more abrupt and opening of first posteriar cell slightly wider, 

 Halttres cream-buff. Legs: in (J, coxae grev, trochanters 



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