74 



Tachinidae. 



78. Cheeks bare 120. Steiniella^. 



— Cheeks with a row of bristles 134. Blepharomyia. 



79. Cubital vein with bristles to or beyond medial 

 cross- vein, if less bristly apical cross- vein wanting 



or very weak 80. 



— Cubital vein with bristles only at base 82. 



80. Vibrissæ ascending 88. Rhacodineura. 



— Vibrissæ not ascending 81. 



81. Cheeks with bristles 107. Digonochaeta. 



— Cheeks bare 110. Actia. 



82. Antennal arista bare or apparently so 83. 



— Antennal arista short-plumose 94. 



83. Second joint of arista elongated 84. 



— Second joint of arista short 87. 



84. Cheeks more or less hairy 85. 



— Cheeks bare 86. 



85. Scutellum with apical bristles 105. Admontia. 



— Scutellum without apical bristles 106. Trichoparia. 



86. Abdomen with only marginal bristles 109. Cras'pedothrix. 



■ — Abdomen with discai and marginal bristles.... 79. Arrhinomyia. 



87. Cheeks finely hairy 106. Trichoparia. 



— Cheeks bare 88. 



88. Small, mainly black species; hind tibiæ with a 



regular row of anterodorsal bristles 79. Arrhinomyia. 



— Generally larger, not black species; hind tibiæ 



without any regular row of anterodorsal bristles 89. 



89. Vibrissæ more or less ascending 90. 



— Vibrissæ not ascending 92. 



90. Legs yellow 89. Hebia. 



■ — Legs not yellow 9L 



91. Exca vation on second abdominal segment not 



reaching hind margin; frons in male broad 139. Vihrissina. 



■ — Excavation on second abdominal segment reach- 

 ing hind margin; frons in male narrow 138. Degeeria. 



92. Abdomen with only marginal bristles 112. Helocera. 



— Abdomen with discai and marginal bristles 93. 



93. Grey pruinose species, tibiæ red; four scutellar 



marginal bristles on each side 121. Pelatachina. 



■ — Strongly spotted species; legs black; only two 



scutellar marginal bristles on each side 140. Trigonospila. 



94. Black species with black legs 132. Phyllomyia. 



— More or less yellow species with yellow legs. . . 130. Myiohia. 



If a species with one orbital bristle in both sexes, see Monochaeta; if a bluish 

 black species with cheeks hairy above and with two postsutural intraalar 

 bristles, see Minella under Rhinophor inae. 



