NORTH AMERICAN TETRASTICHUS — BURKS 



519 



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Figure 16. — Head and Antennae of Tetrastichus 



a, T. longicorpus (Girault): Anterior aspect of head. 



b, T. spilopteris, new species: Lateral aspect of head. 



c, T. paltersonae Fullaway: Lateral aspect of head. 



d, T. carinatus Forbes: Pedicel and ilagellum of 9 antenna. 



e, T. oecanthivorus compar Gahan: Pedicel and flagellum of 9 antenna. 

 /, T. varicornis (Girault): Pedicel and flagellum of 9 antenna. 



g, T. gibboni (Girault): Pedicel and flagellum of 9 antenna. 



h, T. dyrus, new species: Pedicel and flagellum of 9 antenna. 



i, T. iriozae, new species: Pedicel and flagellum of 9 antenna. 



;, T. cormus, new species: Pedicel and flagellum of cf antenna. 



k, T. xanthops (Ratzeburg): Pedicel and flagellum of 9 antenna. 



/, T. triozae, new species: Pedicel and flagellum of cf antenna. 



