LIST OF DIPTERA. 809 



Idia australis, fern. Nigra, subtus flava, abdomine ferrugineo, pal- 

 pis nigris, antennis ferrugineis, pedibus nigris, alis subcinereis 

 ad costamfulvisapicefuscis. 



Head black and shining above, pale yellow, and clothed with 

 pale yellow hairs beneath, ferruginous on each side of the peristoma, 

 which is slightly prominent ; sides of the face without bristles : eyes 

 dark red ; fore part flat, its facets not larger than those elsewhere : 

 sucker and palpi black : feelers ferruginous, much shorter than the 

 face ; third joint linear, conical at the tip, full four times the length 

 of the second; bristle tawny: chest black, dull, clothed with short 

 black hairs : breast pale yellow, clothed with pale yellow hairs : ab- 

 domen pale ferruginous, elliptical, shining, a little broader but not 

 longer than the chest, darker above towards the tip : legs black, 

 clothed with black hairs and bristles ; feet towards the base and 

 foot-cushions pitchy : wings slightly gray, tawny along the fore bor- 

 ders, brown at the tips ; tip cross-vein forming an obtuse angle with 

 the fourth longitudinal vein, joining the third longitudinal vein at 

 a short distance from its tip ; lower cross-vein straight at the base, 

 slightly curved outward from thence to the tip ; wing-ribs and veins 

 tawny ; scales pale yellow ; poisers tawny. Length of the body 

 3i — 4 lines ; of the wings 6 — 7 lines. 



a. New Holland. Presented by the Haslar Hospital. 



b. ? 



Group III. Cosmina, Desv. Essai Myod. 423. 



Idia punctulata, Wied. Nov. Dipt. Gen. 22. Dipt. Exot. ii. 348, 1. 

 Jenson, Bull. Soc. Imp. Nat. Mosc. iv. 341. Musca punctata, 

 Wied. Zool. Mag. iii. 21, 30. Cosmina fuscipennis, Desv. 

 Essai Myod. 423, 1. 



a. South Africa. Presented Dr. A. Smith. 



Group IV. Rhyncomya, Desv. Essai Myod. 424. 



Idia felina. Musca felina ? Fabr. M. rutieeps? Fabr. Syst. Antl. 

 299, 77. M. concinna? Germ. Faun. x. 21. Tachina ruficeps, 

 Meig. Dipt. iv. 319, 137. Tachina columbina, Meig. Dipt. iv. 

 319. Rhyncomya felina, Desv. Essai Myod. 424, 1. R. rufi- 

 ceps, Macq. Hist. Nat. Dipt. ii. 247, 1. B. columbina? Macq. 

 Hist. Nat. Dipt. ii. 248. Idia concinna, Loew, Ent. Zeit. 

 Stett. v. 20, 2. I. speciosa ? Loew, Ent. Zeit. Stett. v. 23, 3. 



a. Albania. From Mr. Walker's collection. 



b. ? 



PART IV. 4 B 



