KEVISTON OF ELEODIINI BLAISDELL. 185 



The group genital characters are as follows: 



Male. — Apicale of the edeagophore triangular, dorsal surface mod- 

 erately convex, with a median longitudinal linear groove, and the 

 base has a rounded lobe at middle. Sternite with an interlobar circu- 

 lar membranous area. 



Female. — Dorsal plate canaliculate, sides reflexed and retracted, 

 submarginal groove completely visible from above ; apex but slightly 

 longer than the appendage, the latter short and conic; superior pu- 

 dendal membrane not longitudinally rugulose and not reaching pos- 

 teriorly beyond the middle of the dorsal plate. 



The three species known to me may be separated as follows : 



Females. — The posterior spur of the protibiiP distinctly larger and longer, more 

 obtuse, than the anterior. 



Thorax convex and smooth. 



Elytra] margins rounded ohscura. 



Eljtral margins acute at humeri acuta. 



The posterior spur very slightly thicker or longer than the anterior; both spurs 

 gradually narrowing from base alil^e, both acute. 



Thorax flat or concave; elytral margin acute throughout .sntiinilis. 



Males. — Anterior spurs of the protibiie quite similar; abd(»n)en ()bli(nie. 

 Thorax convex and smooth. 



Elytral margins rounded ohscura. 



Elytral margins acute at humeri acuta. 



Thorax flat or concave. 



Elytral margin acute throughout siituralis. 



The genital characters appear to present the following specific 

 ditferences. The males as usual present no distinct diU'erential char- 

 acters. 



Female. — Internal lobe of apex well developed. Genital segment trapezoidal 

 in outline, robust; basal prominences well developetl. 

 Apical margin of the dorsal plate rounded. 



Apical margin evenly rounded ohfiCKra. 



Apical margin rounded externally and oblique within siittinili.s. 



Apical margin truncate. 



Apical angle subrectangular acuta. 



A linear arrangement of our species may be given as follows : 



(disprrsa. 

 I dclcta. 

 ohscura. 

 sulriixitnis. 

 a rata. 



f with its 

 acuta i two 



extreme forms. 



Thorax convex 



Thorax concave 



{■suturalis. 

 \tcxana. 



