FAMILY ASILID.^ — THE ASSASSIN FLIES 181 



78. Third antennal segment long", with a bristle-bearing excision above 



(66, 108) Atractia Macquart 



Third antennal segment usually short, never with a bristle-bearing 

 concavity above 79 



79. Slopes or lateral swellings of the metanotum pilose 92 



Slopes or lateral swellings of the metanotum bare 80 



80. Third antennal segment very long and narrow, tapering, with a short, 



thick arista; face very narrow (53, 137) Senoprosopis Macquart 



Third antennal segment short, with long arista; face not unusually 

 narrow 81 



81. Claws acute apically 84 



Claws obtuse apically, thick almost to the apex 82 



82. Front and face wide; space between antennae and posterior ocelli 



strongly transverse 83 



Front and face narrow; space between the antennse and posterior ocelli 

 as great as the width or practically so (134) Promachina Bromley 



83. Face evenly, gently convex, evenly pilose, the oral margin with bristles 



(63, 10.5) *Mallophorina, n. g. 



Face more or less strongly gibbous below, not uniformly pilose (29, 67). 



fMallophora Macquart 



84. Third antennal segment strikingly haired above Anarmostus Lcew 



Third antennal segment bare or with only a few short hairs above. ... 85 



85. Three submarginal cells 86 



Two submarginal cells 87 



86. The crossvein separating the second and third submarginal cells is 



situated well beyond the apex of the discal cell (30, 31, 32). 



Promachus Lcew 

 This crossvein is situated well before the apex of the discal cell (70, 125) 



JErax Scopoli 



87. The posterior branch of the third vein meets the costa before the apex 



of the wing 88 



The posterior branch of the third vein reaches the wing margin behind 

 the apex of the wing 90 



88. The ? ovipositor ends in a circlet of spines; abdomen of males longer 



than the wings (65, 139) Proctacanthus Macquart 



The ? ovipositor is laterally compressed or bears many short spines 

 above; wings reaching beyond the tip of the abdomen in males.... 89 



89. Female ovipositor with many short, stout spines above; upper ocelli 



situated on the front slopes of the ocellar swelling (28, 111). 



Eccritosia Schiner 

 Female ovipositor laterally compressed; upper ocelli on the top of the 

 ocellar swelling (70, 125) JErax Scopoli 



* See page 183. Key, Cuiran, 1931, (Mallophora). Amer. Mus. Novit. No. 487, p. 21. 

 t Curran, 1930, Amer. Mus. Novit. No. 415, p. 12. 

 J Hine, 1919, Ann. Ent. Soc. Amer., xii. pp. 103-154. 



