BY THOMAS G. SLOANE. 319 



Table of Species. 



_A. Elytra green or violaceous, with never more than an apical testaceous 



mark on each elytron. 



B. Labial palpi with basal stalk short, not projecting beyond apex of lobes 



of mentum. (Wingless. Posterior femora not extending beyond apex 



of abdomen. Elytra unicolorous). 



c. Pronotum with sides obtusely rounded vertically and without trace of 



a lateral carina even near anterior angles. Legs and apex of 



abdomen testaceous M. cylindrica Macl. 



cc. Pronotum with sides sharply subcarinate near anterior angles. Legs 



and apex of abdomen black M. frenchi SI. 



"BB. Labial palpi with basal stalk long, projecting beyond lobes of mentum. 

 D. Species with elytra unicolorous (except a very narrow apical margin 

 in M. castelnaui), 

 E. Species without wings. Elytra convex, or cylindrical, lightly 

 ampliate on each side of peduncle ; puncturation obsolete 

 towards apex. 

 /. Elytra parallel, cylindrical. Posterior femora in $ not reach- 

 ing beyond apex of abdomen. Metasternum wider between 

 intermediate and posterior coxse than mesepimera and basal 

 border of metepisterna together. 

 g. Elytra smooth and finely punctate near shoulders. Pos- 

 terior femora ( $ ) not reaching apex of abdomen 



. . .._... M. spenceri SI. 



gg. Elytra rough and coarsely punctate near shoulders. Pos- 

 terior femora ( J ) attaining apex of abdomen (in $ extend- 

 ing a little beyond apex) M. grey ana SI. 



ff. Elytra short, oval ; disc convex longitudinally as well as 

 transversely. Posterior femora ( J ) extending beyond apex 

 of abdomen. Metasternum very narrow between interme- 

 diate and posterior coxse, not wider than mesepimera and 



border of metepisterna together M. howitti Cast. 



EE. Species with wings. Elytra subdepressed, strongly ampliate 

 on each side of peduncle; puncturation extending to apex, 

 or not. 

 h. Elytra with punctures extending to apex. 



i. Ventral segments punctate. Prothorax with lateral carina 

 obsolete behind anterior transverse impression. 



j. Elytra unicolorous M. pulchra Brown. 



jj. Elytra with narrow testaceous apical margin .-. 



M. castelnaui SI. 



