274 PROCEEDINGS OF THE NATIONAL MUSEUM vol. us 



Male genitalia. Valve lacking. Male plates fused for basal two- 

 thirds, with short macrosetae apically. Pygofer with both dorsal 

 process and ventral hook. Anal tube simple. Connective broadly 

 Y-shaped. Apex of style hooked in lateral view. Aedeagus in lateral 

 view with shaft turned either dorsally or ventrally in apical portion. 

 Aedeagal apex simple or elaborated with short paired processes. 



Discussion. — The genus contains only two species. The type- 

 species, Coelella distincta (Oman), occurs in the southwestern United 

 States, while the second species, C. venosa (DeLong) 1953, p. 126, is 

 Mexican. The male genital structures of the type-species are illus- 

 trated in figures 87-93. 



Bisa Walker 



Figures 36, 114 



Biza Walker 1858, p. 253. Type of genus Biza crocea Walker by original designa- 

 tion. 



Description. — With carina separating face and crown. Crown in 

 dorsal view subquadrate, wider than long, produced beyond eyes, 

 rounded apically, and carinated laterally and posteriorly. Ocelli 

 on anterior margin of crown. Antennae at least half as long as body 

 including forewings. Head including eyes narrower than pronotum. 

 Posterior margin of pronotum broadly but rather shallowly indented. 

 Forewings broad with venation distinct. 



Ground color yellow to orange with extensive brown or fuscous 

 markings on the forewings. 



Male genitalia: Valve lacking. Male plates fused only basally. 

 Pygofer in lateral view with only ventral hook or tooth, no dorsal 

 processes, apex acute or rounded. Anal tube and styles simple. Con- 

 nective Y-shaped and clearly articulated with aedeagus. Aedeagus 

 simple, upturned apically, with or without lateral processes. 



Discussion. — As can be seen by reference to the habitus drawing 

 (fig. 114), the general cercopid-like appearance is striking. The 

 included species are known from Central and South America. The 

 genus Biza was recently revised by Kramer (1962). 



Coelidiana Oman 



Figures 94-107 



Coelidiana Oman 1938, p. 397. Type of genus Neocoelidia rubrolineata Baker 



by original designation. 

 Acocoelidia DeLong 1953, p. 130. Type of genus Acocoelidia unipunda DeLong 



by original designation. New synonomy. 



Description. — With carina separating face and crown. Crown in 

 dorsal view variable with length and width subequal or length exceed- 

 ing width, angled apically, and produced beyond eyes. Ocelli on 

 anterior margin of crown. Head including eyes narrower than 



