290 



Orthorrhapha brachycera. 



22. 

 23. 

 24. 



25. 



26. 



27. 



28. 

 29. 



30. 

 31. 



32. 



Middle tibiæ not black on the basal part; legs short- 



haired; thorax very slightly pruinose, shining 20. exigua. 



Thorax yellow 23. 



Thorax black 25. 



Thorax quite yellow 24. 



Thorax with a black middle line 24. pedoralis, 



Epistoma yellow; the thoracic disc uniformly clothed 

 with short hairs; the three last joints on the front 



tarsi dilated 22. liitea. 



Epistoma black; the thoracic disc with uniserial dorso- 



central and biserial acrostichal hairs ; front tarsi simple 23. exilis. 



Third antennal joint short or slightly elongated, an- 



tennæ, excluding arista, shorter than the head 26. 



Third antennal joint much elongated, antennæ, ex- 

 cluding arista, as long as or longer than the head 30. 



The thoracic disc uniformly clothed with hairs 27. 



The thoracic disc with uniserial dorsocentral and 



biserial acrostichal bristles 28. 



Third antennal joint very short, slightly longer than 



broad ; notopleural and scutellar bristles yellow .... 25. macida. 



Third antennal joint a little elongated, considerably 



longer than broad ; notopleural and scutellar bristles 



black 29. pallipes. 



Antennæ yellow 28. thoracica. 



Antennæ dark 29. 



Middle femora somewhat thickened, the apical spine 



rather large; middle tibiæ without a special pubescence 26. fuscicornis. 



Middle femora almost not thickened, the apical spine 



almost wanting; middle tibiæ with a special, dense 



pubescence on the apical half 27. ciliaris. 



Arista dark, shorter than the third joint 31. 



Arista white, longer than the third joint 32. 



Posterior coxæ, apical part of the hind femora, and 



front tibiæ black 30. nigritarsis. 



Legs yellow 31. longicornis. 



Arista long, longer than the rest of the antennæ; 



legs chiefly yellow 32. alhiseta. 



Arista shorter, about as long as the third joint, legs 



chiefly black 33. alhocapillata. 



1. T. flavipes Fabr. 



1794. Fabr. Ent. Syst. IV, 406,19 {Emjm). - 1805. Fabr. Syst. Antl. 



142, 1. - 1822. Meig. Syst. Beschr. 111, 81,32. — 1842. Zett. Dipt. Scand. 



I, 273,1. — 1862. Schin. F. A. I. 87 {Platgpalpus). — 1903. Kat. palåarkt. 

 Dipt. II, 283. 



Male. Vertex and frons grev, the latter narrow with parallel 

 margins; epistoma white; palpi somewhat small, yellow, with white 

 hairs. Occiput grey, with yellow bristles above, white hairs below. 



