Phytophagous Coleo-ptera, ^c. 259 



a strong transverse ridge ; antennas more than three- 

 fourths the length of the body, the 3rd joint shorter than 

 the 4th, the latter distinctly longer than the 5th ; the 

 basal joint fulvous, the rest black. Thorax nearly three 

 times as broad as long at the base ; sides rounded and 

 converging from the base to the apex, sinuate just behind 

 the anterior angle, the latter obtuse, hinder angles acute ; 

 upper surface rugose, clothed with adpressed fulvous hairs, 

 the anterior disk deeply and broadly transversely exca- 

 vated. Elytra broader than the thorax, parallel on the 

 sides, convex, rugose-punctate, densely clothed with short 

 adpressed sericeous hairs. 



From M, nigricornis, Clark (to Avhich insect the pre- 

 sent species is most nearly allied), it may be known by the 

 more parallel form, by the more deeply excavated thorax, 

 and by the different relative length of the joints of the 

 antennae. 



