220 [September, 1809. 



8ub-globosc head ; widely separated oval eyes ; drooping antennae, of 

 short or moderate length, with the third joint obtuse, and a plumose 

 or bare arista ; oral setae large, usually three or four in number ; 

 palpi filiform and setose ; proboscis mostly long and horny ; thorax 

 oblong and convex; scutellum with four or six bristles; abdomen 

 rather short, ovato-cylindrical in the male, with small hypopygium, 

 depressed, ovate, and pointed in the female ; wings long ; legs strong 

 and spiuose. 



1 (18) Ariata plumose. 



2 (7) AnteniiEe black. 



3 (6) Femora grey. 



4 (5) Abdomen clothed with long yellow hairs 1. stercoraria, Jj. 



5 (4) Abdomen with short pale hairs 2. tnerdaria, F. 



6 (3) Femora yellow, with black stripes 3. cineraria, Mgn. 



7 (2) AntennfiB red or brown. 



8 (11) Wings with third and fourth long veins convergent. 



9 (10) Large yellow-haired species 4. sct/halaria, h. 



10 (9) Small dark brown species 9. eximia,H».\. 



11 (8) Wings with the long veins parallel. 



12 (15) Cross veins clouded. 



13 (14) Little cross vein only clouded; third joint of antennae brown... 



5. analis, Mgn. 



14 (13) Both cross veins clouded ; antennae quite red or yellow 6. suilla, F. 



15 (12) Cross veins unclouded. 



16 (17) Thorax covered with yellow tomentum 7. lutaria,F. 



17 (16) Thorax covered with slate-coloured tomentum 8. inquinata, Mgn. 



18 (1) Arista pubescent or nude (sub-gen. Scatina, Dsv.). 



19 (21) Palpi black \0. fontanalis,'R,n^. 



20 (21) Palpi pale, with black tips 11. lipunctata, Mcc^. 



21(19)(20)Palpi quite pale. 



22 (27) Legs yellow. 



23 (24) Abdomen yellow 12. heteromyzina, Ztt. 



24 (23) Abdomen fuscous 13. calida, Hal. 



25 (26) Fore femora with a black mark upon the upper surface... 



14. squalida, Mgn. 



26 (25) Fore femora with bases black 15. arrogans,'R&\. 



27 (22) Legs black. 



28 Middle femora with bases rufous. 



29 (30) Species very hairy 17. viHipe.i, Ztt. 



30 (29) Species with few hairs 16. Iitorea,F\n. 



31 Tibia; testaceous 18. rtuUs,lIa\. 



Sp. 1. — S. STERCOBARIA, L. 

 This (the common dung fly) is more or less thickly covered with reddish-yellow 

 hairs. It has the frontal space wide, with grey edges and red median stripe ; vertex 



