MUSCIDiE. 143 



TABLE OF GENERA. 



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



upper side only. ......... 2 



Proboscis not elongate, the labelia prominent and not adai)ted for 

 piercing -j 



2. Palpi nearly as long as the proboscis. . . ILiai.^TOBi.-v Desvoidy. 

 Palpi shorter than the proboscis. . . . Stomoxys GeoftYoy. 



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 riridis Wied.?) Hemichloha v. d. Wulp. 



6. Curvature of fourth vein angular. 6 



Curvature of fourth vein rounded or arcuate 12 



0. 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). ......... MnscA Linne. 



Middle tibiaj 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 9 



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



9. Dorso-central bristles present. ....... 10 



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



Chlokoprocta v. d. Wulp. 



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



ly noticeable near the root of tlie wings. Pollenia Desvoidy. 



No such hairs present. .... Calliphora Desvoidy. 



11. Thoracic dorsum with ratlu^r distinct black and whitish stripes. 



CoMPSOMViA Rondani. 



Thorax unicolorous, metallic, at most witii 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. . l-i 



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



fourth vein Vjefore 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 ; aj)ical cell wide oi)en at tip of wing. . . !<• 



