frtfRHAM DIPTERA. 217 



XXXI. 



125 (124). Shining metallic blue or green species ; cheeks with 



at most a few scattered hairs near the antennae, 

 usually quite bare; facialia, above the strong 

 mouth-bristles, with a row of short little bristles, 

 which reaches almost to the middle of the face. 



126 (127). V.4., beyond the angle, scarcely bent inwards, and 



then nearly straight ; dorsum scarcely longer 

 than broad. Onesia, Dsv. (415) 



127 (126). V.4., beyond the angle, very much bent inwards, 



and then bent outwards ; dorsum much longer 

 than broad. Cynomyia, Dsv. (414) 



128 (119). Arista plumose to the tip ; abdominal bristles 



present. 



129 (140). 0.4 2 closed. 



130 (133). V.4. with a hang-vein at the angle. 



131 (132). Third antennal joint many times longer than the 



second. Mintho, Dsv. (360) 



132 (131). Third antennal joint scarcely longer than the second. 



420. Nyctia, Dsv. (1882. halterata, Pz.) 



133 (130). V.4. without a hang-vein. 



134 (135). Cheeks with bristles below near the eye-edges. 



Rhinophora, Dsv. (409) 



135 (134). Cheeks bare. 



136 (137). X.5 2 nearer to X.4. than to the bend of V.4. 



Melanophora, Mg. (408) 



137 (136). X.5 2 nearer to the bend of V.4. than to X.4. 



138 (139). 0.4 2 closed at the margin, or very short stalked ; 



legs chiefly orange. 



433. Dixera, Mcq. (190 1. gricescens, Fin.) 



139 (138). 0.4 2 stalked; legs chiefly black with orange tibiae. 



429. Myiostoma, Dsv. (1897. cristalum, Rnd.) 



140 (129). 0.4 2 open. 



141 (142). Proboscis bristle-like, far and horizontally pro- 



truding. 



431. Prosena, St. Farg. (1900. sybarita, F.) 



142 (141). Proboscis neither bristle-like nor far protruding. 



143 (146). 0.4 2 ending at the wing tip. 



