DIPTERA. 229 
Genus SYRPHUS, Fabr. 
Syrenus revix, Mas et Fem. 
Aineus, capite scutelloque flavis, thoracis lateribus fulvis, abdomine nigro 
fasciis fulvis una interrupta duabusque biarcuatis ornato, antennis 
Serrugineis, pedibus fulvis, alis subfulvis. 
Head yellow, paler and clothed with whitish hairs beneath: eyes 
pitchy; all the facets very small: mouth pitchy: feelers ferruginous : 
chest brassy, clothed with tawny hairs ; sides of the chest tawny ; scutcheon 
yellow : abdomen black, nearly elliptical, longer and a little broader than 
the chest, adorned with three very broad tawny bands; the first interrupted 
by « broad interval, on approaching which it has a conical form on each 
side ; second very convex on each side of the hind border and deeply indented 
in the middle ; hind border of the third forming two semicircles and much 
indented between them ; tip tawny with « black disk: legs tawny ; tips of 
the claws black: wings slightly tawny ; wing-ribs, veins, and poisers tawny ; 
veins black towards the tips; brands pale brown. Length of the body 34 
—4 lines; of the wings 7—8 lines. 
Canaries. 
Syrpuus DenvTaTus, Mas. 
Aineo-viridis, capite scutelloque flavis, thoracis lateribus fulvis, abdomine 
nigro fasciis fulvis una interrupta duabusque incisis ornato, antennis 
picets subtus fulvis, pedibus fulvis, alis limpidis. 
Head yellow, whitish and clothed with white hairs behind ; a black 
stripe extending from the epistoma along half the length of the face: eyes 
dark xed: mouth black with a tawny tip: feelers pitchy above, tawny be- 
neath; sixth joint black, tawny towards the hase: chest brassy-green, 
clothed with tawny hairs; sides tawny; scutcheon yellow : abdomen black, 
elliptical, a little longer and narrower than the chest, adorned with three 
very broad tawny bands ; the first interrupted by a broad interval which di- 
vides it into two nearly triangular spots ; the hind border of the second not 
reaching the sides of the abdomen, and having a notch in the middle ; 
third also with a semicircular colourless notch in the middle, and with a less 
conspicuous tawny stripe near the tip: legs tawny ; feet pitchy towards the 
Qu 
