MUSCID^S. 143 



TABLE OF GENERA. 



1. Proboscis long and slender, directed forward ; arista plumose on the 



upper side only. 2 



Proboscis not elongate, the labella prominent and not adapted for 

 piercing. ........... 3 



2. Palpi nearly as long as the proboscis. . . H^EMATOBIA Desvoidy. 

 Palpi shorter than the proboscis. . . . STOMOXYS Geoffroy. 



3. Arista plumose on both sides 5 



Arista bare or plumose above only 4 



4. Arista bare. . SYNTHESIOMYIA Brauer and Berg. 

 Arista plumose above (Idia viridis Wied."?) HEMICHLORA v. d. Wulp. 



5. Curvature of fourth vein angular. . . . ... . 6 



Curvature of fourth vein rounded or arcuate 12 



6. Eyes pilose. . . . . . . . " TYREOMMA v. d. Wulp. 



Eyes bare . 7 



7. Middle tibiae without bristles on the inner side (blackish species with 



the abdomen more or less yellow, but always without metallic col- 

 oration) . . . MUSCA Linne. 



Middle tibiae with one or more bristles on the inner side (often with 

 metallic coloration on the abdomen or other parts of the body.) 8 



8. Thoracic dorsum usually blackish. . v . . - 9 

 Thorax, scutellum and abdomen brightly metallic. ... 11 



9. Dorso-central bristles present 10 



Dorso-central bristles absent; no bristles above the vibrissae. 



CHLOROPROCTA v. d. Wulp. 



10. Thorax and abdomen with depressed hairs among the bristles, especial- 



ly noticeable near the root of the wings. POLLENIA Desvoidy. 



No such hairs present. . -_ ... . CALLIPHORA Desvoidy. 



11. Thoracic dorsum with rather distinct black and whitish stripes. 



COMPSOMYIA Rondani. 



Thorax unicolorous, metallic, at most with some whitish tomentum on 

 the anterior portion. ... . . LUCILIA Desvoidy. 



12. Wholly metallic species. ' ." ... . PYRELLIA Desvoidy. 

 Black, grey or rufous species, sometimes the abdomen, its base ex- 



cepted, metallic. . . . t . . . . .13 



13. Apical cross vein distinct, longer than the terminal portion of the 



fourth vein before its curvature; apical cell opened a little before 

 tip of wing. .......... 14 



Apical cross- vein less conspicuous; fourth vein curved upwards at its 

 extremity only ; apical cell wide open at tip of wing. . . 1( 



