Tachinidae. 63 



— Wings without or with a quite small costal spine, 



in the latter case discai vein short 12. 



11. Frons raoderately protruding; third antennal joint 



about twice as long as second ; no distinct acrostichals 33. Hilarella. 



— Frons strongly protruding; third antennal joint 



thrice as long as second : acrostichals present .... 34. Paragusia. 



12. Discai vein of normal length; first posterior cell 



ending somewhat near apex of wing 35. Sphecapata. 



— Discai vein short; first posterior cell ending long 



before apex of wing 36. Heteropterina. 



13. Abdomen without bristles 37. Ptychoneura. 



— Abdomen with strong marginal bristles 38. Pachyofhthalmus . 



VII. Rhinophorinae. 



No ventral membrane. Second abdominal sternite lying free 

 on the lateral margins of the tergite or between these margins, and 

 this and the other sternites generally visible in male, in female more 

 or less to quite concealed. Frons in male narrow, broad in female 

 or about equal in both sexes. Antennæ generally inserted below 

 middle of the eye. Arista generally pubescent or short-hairy. Frontal 

 bristles descending to insertion of antennæ or a little below; they 

 are crossing or some reclinate; an outwards directed bristle present 

 in female or in both sexes, and likewise orbitals in female or in both 

 sexes. Eyes bare or hairy. Thorax with generally only one pair of 

 præsutural acrostichals, sometimes wanting. Exterior posthumeral 

 bristle placed higher than the præsutural or in same height, and 

 nearly always only this one present. No præsutural intraalar bristle 

 and nearly always two postsutural. Propleura bare. Upper part of 

 postscutellum not convex; scutellum with two or three marginal 

 bristles on each side, rather equal. Abdomen with the excavation 

 on second segment not reaching hind margin. First posterior cell 

 often petiolate, sometimes closed or open at apex of wing; generally 

 a costal spine present. Thoracic squamula narrow, its inner margin 

 bending away from scutellum; this is, as stated by Villeneuve (Ann. 

 d. Se. Nat. Zool. 10, VII, 1924, 11) the most significant character, 

 wanting only in a couple of species. 



The species are generally small, at most medium sized, of black 

 colour, not rarely with blackish marked wings. Those of which the 

 development is known are parasitic on Oniscus and some on beetles. 



