Dolichopodidae. 69 



— Epistoma a little broader, whitish; antennæ shorter 



than the head, third joint shorter than broad .... 37. caligatus. 



37. Third joint of antennæ partly yeUow (in sabinus 

 only a small spot below, but this species has the 



hind metatarsi pale at the base) 38. 



— Third joint of antennæ all black; hind metatarsi 



black 41. simplex. 



38. Basal joint of antennæ quite yellow 39. 



— Basal joint of antennæ black above; hind metatarsi 

 yellowish at base 39. sabinus. 



39. Hind tibiæ at tip and hind tarsi black 19. plumipes. 



— Hind tibiæ quite, and base of hind tarsi yellow . . 20. Wahlbergi. 



40. Basal joint of middle tarsi with a bristle above 41. 



— Basal joint of middle tarsi without any bristle above. . . 42. 



41. Posterior femora with only one preapical bristle .. i^. brevipennis. 



— Posterior femora with more than one preapical bristle 43. imgulatus. 



42. Epistoma whitish, frons green 44. longitarsis. 



— Epistoma grey, frons brownish 45. rupestris. 



The females of varitibia and apicalis are imknown ; the latter 

 will, I think, be easily recognised by the postocular bristles being pale 

 below, but with the lowermost black. 



To facilitate the general view I may add the following summary: 



Basal joint of middle tarsi with a bristle above in both sexes : 

 Stenhammari, claviger, ccnfusiis, trivialis, festivus, ciliefemoratus, arbu- 

 storum, brevipennis, ungulatus. 



Middle tibiæ with more than one bristle beneath in both sexes 

 (the bristles, or some of them, may be antero- or postero-ventral) : 

 plcmitarsis, Stehammari, claviger, discifer (the male sometimes only 

 one), confimis, trivialis, festivus, ciliefemoratus, arbustorum, brevipennis, 

 ungulatus. These two characters thus follow each other, only plani- 

 tarsis and discifer form exceptigns. 



Hind metatarsus with only one bristle above in both sexes: 

 clavipes, griseipennis, agilis. 



More than one preapical bristle in both sexes: on hind femora: 

 popularis, urbanus (female generally only one); on middle femora: 

 campestris-, on posterior femora: claviger, ungulatus. 



Hind femora fringed beneath in the ma\e: mel atiopus (black), plani- 

 tarsis (pale), Stenhammari (black), tanythrix (black), campestris (black), 

 lepidns (black), clavipes (paÅe), trivialis (psde), festivus (psde), ciliefemoratus 

 (pale), arbustorum (pale), griseipennis (black), brevipennis (pale), lotigi- 

 tarsis (black); in ungulatus all femora are black fringed; in claviger 



