FAMILY ASILID/E THE ASSASSIN FLEES 171 



6. Third antennal segment with an apical depression or style in which is 



inserted a small short spine 8 



Third antennal segment excised above beyond the middle and bearing a 

 short spine 7 



7. Pulvilli present and large (17, 18, 71, 142) 'Taracticus La'W 



Pulvilli absent Parataracticus Cole 



8. Posterior pulvilli not more than one-third as long as the claws, (13, 



96, 123) Blepharepium Rondani 



Posterior pulvilli more than half as long as the claws 9 



9. Abdomen thickly pilose, at least laterally 10 



Abdomen almost bare 11 



10. Face convex, pilose on lower two-thirds (Brazil) Lastaurina, n. g. 



Face flat above, pilose on less than lower half (58, 95) . . Lastaurus Loew 



11. Fourth posterior cell closed and petiolate at apex 12 



Fourth posterior cell open or closed in the wing margin (88, 102). 



tSaropogon Law 



12. Abdomen clavate; scutellum without bristles (138, 153) 



Senobasis Macquart 

 Abdomen not clavate; scutellum with bristles (14, 15, 150). 



Diogmites Lcew 



13. Face gibbous in the middle, leaving a flattened space immediately below 



the antennje (16, 94) JLestomyia Williston 



Face evenly convex or prominent below 14 



14. The dense mystax occupies the lower half of the face (81, 87). 



Aphamartania Schiner 

 The dense mystax is limited to the lowest fourth 15 



15. Scutellum without bristles or hair Cophura Osten Sacken 



Scutellum w-ith bristles or hair 16 



16. Scutellum with fine hair on the disc (20, 97) Nicocles Jannicke 



Scutellum with bristles only (19, 83, 98) §BiickeIlia Curran 



17. Marginal cell open or closed in the costa 18 



Marginal cell closed and petiolate 59 



18. Pulvilli vestigial or wanting 19 



Pulvilli normal, the posterior pair sometimes shortened 25 



19. Third antennal segment with a terminal arista or arista-like style, 



very slender species 22 



Third antennal segment with or without terminal style, if stylate the 

 abdomen robust 20 



20. Claws very long and with an elongated tooth at the base of each claw 



( 5 ) Dicranus Lcew 



Claws normal 21 



* Curran, 193n. Amer. Mus. Novit. No. 425, p. 4. 



t Curran, 1931, Amer. Mus. Novit. No. 487, p. 1. 



} Curran, 1931, Amer. Mus. Novit. No. 487, p. 3. 



§ Curran, 1931, (Cophura), Amer. Mus. Novit. No. 487, p. 5; Melander, 1923, (Cophura), 



Psyche, y.xx, p. 208 (includes Cophura). 



