608 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.46. 



h^. Antennae reaching only to clypeus; caudal prolongation square at 

 tip, never bifurcate; etylea slender, broadened at tip, apical 



margin straight or a little concave ercctus niger, new variety. 



7^. Male pygofer not deeply notched above and not conspicuously pro- 

 duced caudad. 

 h^. Color black ; irons narrow, sides rather straight; frontal carinse white. 

 iK Pronotum mostly white, scutellum dark; styles with a tooth on 



inner margin near apex puellis Van Duzee. 



i^. Pronotum white between carin;e, black without, and white on 

 lateral margin; scutellum white between lateral carinse; styles 

 produced on inner margin into a long acute prolongation. 



puellis mexicanus, new variety 



K^. Color brown, often rather light brown; pronotum very rarely lighter; 



carinse very narrowly pale. 



t'. Median frontal carina often forked below apex of head; carinse 



sometimes scarcely lighter than fovese; dorsum with median 



light vitta albolineosus Fowler. 



i^. Median frontal carina forked at apex of head; styles broadened 



suddenly at apex pacijicus, new species. 



c'. Frons unicolorous, carinas not or scarcely differentiated in color from fovese. 

 d\ Genital styles simple, acute at tip. 



e^. Color brown to black; body rather small; frons narrow, black. 

 /'. Carinse prominent on vertex and frons; color fuscous to dark brown. 



basivitta Van Duzee. 

 /2. Carinse rather weak, not prominent: color shining black, clypeus and 



venter yellow; styles arcuated at apex andromedus Van Duzee. 



e^. Color yellowish to light brown, abdomen darker. 



/'. Elytra black; styles slender, acuminate kilviani Van Duzee. 



/2. Elytra pale, hyaline; styles very stout and thick, suddenly narrowed 



and flexed out at apex magnus. new species. 



d'^. Genital styles not acute at tip, rounded or bifurcate. 



e^. Styles broad at least apically, rounded or square at apex. 

 /'. Color light brown to yellowish. 



gK Frons rather narrow; pygofers of male with prominent tooth above in 

 profile; styles broad, rounded at apex; calcar normal. 



lateralis Van Duzee. 

 g'^. Frons moderately broad; pygofers without dorsal process; styles 



broad ; calcar very large humulis Van Duzee. 



p. Color mostly brown to black; male pygofers deeply notched above, 

 produced caudad around anal tube. 

 g\ Frons conspicuously narrowed above, sides straight; styles long, 

 broadened and spatulate at apex. 

 h^. Elytra slightly browned; color of body sometimes light brown. 



erectus, new species. 

 h'. Elytra glossy black; head and thorax yellowish. 



erectus nigripennis, new variety. 

 ^-. F'rons not conspicuously narrowed above; styles slender, dilated at 

 apex, enclosing an oval space; color fuscous black. 



basifuscatus Fowler. 

 e^. Styles large, conspicuously bifurcate at apex; anal tube toothed on ventral 

 margin. 

 /'. Color shining black; styles rather straight, dilated and broadly bifurcate 



at apex; anal style large atrior Fowler. 



/^. Color reddish brown to dark; styles arcuate, stout, apex deeply bifur- 

 cate, with inner process again bifurcate; anal style short. 



magnistylus , new species. 



