128 Phoridae. 



metrical; female with proboscis very large. Wings 



with seventh vein very weak and short 1. opaca. 



— Antennæ with third joint smaller; abdomen in male 

 with only sixth segment a little elongated and hypo- 

 pygium smaller, greyish, with arms of forceps almost 

 symmetricai; female with proboscis not large. Wings 



with seventh vein reaching to or almost to the margin 2. lugubris. 



4. Third vein with small bristles 3. pauciseta. 



— Third vein without bristles 5. 



5. Costa thickened in the outer half 4. intermedia. 



— Costa not thickened 6. 



6. Palpi narrow, only with long bristles at apex; sixth 

 abdominal segment in male with long bristly hairs 

 at hind margin, and hypopygium shining with sym- 

 metricai, thin, stiletto-like arms of forceps; female 

 with proboscis large and with long hairs on venter 



towards apex 5. trinervis. 



— Palpi of ordinary shape, in male with short bristles; 

 male without bristly hairs on sixth segment, and 

 hypopygium dull, with broad, unsymmetrical arms 

 of forceps; female with proboscis not large, and venter 



without long hairs 6. sublugubris. 



7. Halteres whitish or yellow 8. 



— Halteres black or blackish 11. 



8. Palpi yellow 9. 



— Palpi black 10. 



9. Arms of male forcejis symmetricai; seventh sternite 

 of female ending with a narrow apwards curved 

 prolongation 7. luteifemorata. 



— Arms of male forceps symmetricai (only male known) . 8. similis. 



10. Legs rather slender; left arm of forceps spoon-shaped, 

 rounded at the end, black; seventh sternite of female 



rounded at the end 9. intempesta. 



— Legs less slender; left arm of forceps with a large 

 triangalar tooth on the anterior side, yellow ; seventh 

 sternite of female excised at the end with the corners 



drawn out 10. excisa. 



11. Costa short, not reaching the middle, not thickened . . 11. Dudai. 



— Costa longer, reaching to middle or beyond, thickened 



towards the apex 12. tumidula. 



1. T. opaca Meig. 



1830. Meig. Syst. Beschr. VI, 216, 12 {Phora). — 1848. Zett. Dipt. Scand. 

 VII, 2866, 16 {Trineura). — 1864. Schin. F. A. II, 342 {Phora). — 1901. Beck. 

 Abhandl. zool. bot. Gesell. Wien, I, 17, 2, p. p. {Phora). — 1906. Wood, Ent. 

 Month. Mag. 2, XVII, 192, 264 {Phora). — 1906. Collin, ibid. 177 {Phora). — 

 1910. Kertész, Cat. Dipt. VII, 394 {Phora). — 1914. Brues, Bull. Wisc. Nat. 



