from Meigen's " Systematische Beschreihun^ 



159 



Ocelli 3, equal in size. Antenrus cylindric. Thorax without a transverse 

 suture at the middle. 



36. ScATo'psE. AntenncB 1 1-jointed. Eyes lunate. 



37. Pentiie''tria. Antennfs W-^omieA. Eyes o\q\. Z/<7g,? unarmed. 



38. Di^LOPHUS. AntenncB 1 1-jointed. Fore-tibia with the apex radiated 



39. Bi'viio. AntenncB 9-jointed. 



40. Aspi'sTES. AntenncB 8-jointed, the apex clavate. 



41. Rhy^phus. AntenncB 16-jointed. 



B. Antennce mthfew Joints. 



Fam. II. XYLO'PHAGI. (/g.46.) 



AntenncB porrect, approximating at the 

 base, triarticulate ; third joint 8-ringed. 

 Proboscis retracted (drawn into the 

 head), only the labella exserted. Ocelli 

 3. Abdomen with 8 segments, Hal- 

 teres naked. Wings parallel, incum- 

 bent (lying on the back). Onychii 

 3.t 



42. Be^ris. Scutellum multiradiate. 



43. Xylo'phagus. Scutellum unarmed. 



44. CcENOMY^iA. Scutellum biden- 



tate. 



Fam. III. 



Xyl6phagus maculktus, with the antenna 

 of X, ater. 



rABA^NII. 



AntenncB porrect, approximating at 

 the base; either 3-jointed, with 

 the third joint from 4 to 8-ringed, 

 or 6-jointed. Proboscis and palpi 

 exserted. J6c?o?we«with7segments. 

 Halteres sub-concealed. Wings 

 divaricate (spreading), or deflexed 

 (turned downwards). Onychii 3. 



(/g.47.) 



45. 



46. 



47. 



48. 



49. 



Tabinus teurinus. 



a. AntenncB ^-jointed. 

 Pango'^nia. AntenncB y third ]0\nt 



8-ringed. Ocelli 3. Proboscis 



exserted, elongated. 

 Si'lvius. AntenncBy basal joint cylindric, second cyathiform, third 



5-ringed. Ocelli 3. 

 Taba^nus. AntenncB, third joint 5-ringed, the upper side excised (or 



notched) at the base. Ocelli wanting. 

 Chry^sops. AntenncBy 2 basal joints cylindric, equal, third 5-ringed. 



Ocelli 3. 

 HJEMATo'poTA. AntenncB, third joint 4-ringed. Ocelli wanting. 



50. Hexa'toma. 



b. AntenncB 6'Jointed. 



Fam. IV. LETTIDES. (Jig. 48.) 



Antenncs porrect, approximating at the base, triarticulate, third joint not 

 ringed. Proboscis and Palpi exserted. OcelM 3. Abdomen with 7 segments. 

 Halteres naked. Onychii 3. 



f This term is used by Meigen to designate those pulvilli of Kirby 

 and Spence, which are situated between the unguiculi. (See^g. 57. a.) 



