Dohrniphora. 151 



2. Hind tibiæ with both anterodorsal and anteroventral 

 bristles; male with third antennal joint somewhat large, 

 lemon-shaped ; female with tergal plate on fifth abdominal 



segment ; balteres black 1. crassicornis. 



— Hind tibiæ with only anteroventral bristles; third an- 

 tennal joint in male not large; female without tergal 

 plate on fifth abdominal segment; balteres yellow to 



black 2. concinna. 



3. Fourth to seventh vein not reaching the margin; fourth 



vein straight; balteres yellow 3. ahhreviata. 



— Fourth to seventh vein reaching the margin; foarth vein 



not straight; balteres dark 4. 



4 Palpi and antenna brown or blackish; fourth vein 



slightly and simply curved 4. Oldenhergi. 



— Palpi orange, antennæ partly reddish ; fourth vein some- 

 what S-like and more curved 5. 



5. Fourth vein moderately curved; antennæ in male some- 

 what large ; abdomen in female red except first segment . . 5. abdominalis. 



— Fourth vein more strongly curved; antennæ in male not 

 enlarged; abdomen in female black or red with black 

 tergites 6. florea. 



1. D. crassicornis Meig. 



1830. Meig. Syst. Beschr. VI, 220, 26 (Phm-a). - 1848. Zett. Dipt. Scand. 

 VII, 2874, 24 {Trineura). — 1864. Schin. F. A. II, 344 (Phora). - 1901. Beck. 

 Abhandl. zool. bot. Gesell. Wien, I, 23, 10, Taf. I, Fig. 12, Taf. IV, Fig. 60-61 

 (Phora). — 1906. Wood, Ent. Month. Mag. 2, XVII, 195 {Phora). — 1910. 

 Kertész, Cat. Dipt. VII, 391 (Phora). — 1914. Brues, BuU. Wisc. Nat. Hist. 

 Soc. XII, 95. — 1918. Schmitz, Jaarb. Natuarh. Genootsch. Limburg 1917, 

 110 et 1920 ibid. 1919, 100. 



Male. Frons slightly broader than high, black, somewhat shining, 

 coarsely punctate; the bristles in nearly straight rows or the anterior 

 rows slightly convex. Antennæ black or brownish black, third joint 

 rather large, lemon-shaped and a little pointed; arista very short- 

 pubescent. Palpi black, of ordinary size, with the bristles well devel- 

 oped. Thorax black, nearly dull, with black pubescence and one 

 pair of dorsocentral bristles. Scutellum with four strong, practically 

 equal bristles. Pleura black, a little rugose below and behind. Abdomen 

 black, a little greyish, dull; first segment narrowed in the middle 

 and with the hind margin pale and also the membrane in front of it 

 pale; second and sixth segments elongated; no hairs visible on ab- 

 domen except on the apical part of sixth segment. Hypopygium 

 small when seen from above, and often rather retracted; the tergite 



