MONOLEPTA. 623 



11. Monolepta violacea. 



Black; the basal three joints of the antennae, the head, thorax, and the anterior legs, fulvous; elytra dark 

 violaceous-blue, scarcely visibly punctured. 



Length 2-2A lines. . i -j j. 



Head impunctate ; the frontal tubercles distinct, trigonate ; the clypeus with an acute central ridge ; antennae 

 two thirds the length of the body, black, the three lower joints, and often the base of the fourth joint 

 fulvous or flavous, the third joint about one half longer than the second ; thorax scarcely twice as broad 

 as long, the sides and the posterior margin rounded, the surface with two more or less distinct depressions, 

 not visibly punctured; scutellum black; elytra extremely finely punctured, the interstices extremely 

 minutely granulate; the anterior legs and the intermediate femora fulvous, the rest of the legs and the 

 underside black. 

 Eab. Mexico, Durango city, Ventanas, Ciudad in Durango (Edge). 



The elytra in some specimens are nearly black, but in the majority are dark bluish 

 or violaceous, and their punctuation can only be seen under a strong lens ; the epipleurse 

 are continued below the middle. The metatarsus of the posterior legs is nearly half 

 the length of the tibia? ; the latter are armed with a distinct spine. 



12. Monolepta caeruleipennis. 



Black; thorax fulvous, minutely punctured; elytra dark blue, distinctly and closely punctured. 



Length 2 lines. , . . ,, , 



Head bluish-black, finely punctured at the vertex; antennae black, the third joint twice as long as the second 

 (the apical three joints are broken off) ; thorax transverse, the sides feebly, the posterior margin distinctly, 

 rounded, the surface very finely punctured, with an almost obsolete depression on each side ; elytra rather 

 convex, dark blue, closely and distinctly punctured, the interstices slightly rugose. 



Eab. Mexico, Pinos Altos in Chihuahua (Buchan-Eepbum). 



M. cceruleipennis differs from if. violacea in the entirely black head, antenna?, and 

 legs, and in the much more distinctly punctured elytra. 



13. Monolepta velutina. (Tab. XXXIV. fig. 24.) 



Oblong ovate, subdepressed, black, the basal joints of the antenna,, the thorax, and the tibi* fulvous ; elytra 

 obscure bluish-black, opaque, impunctate. 



Hrarra 2 ther e narrowly elongate, impunctate, opaque, the vertex finely granulate ; the clypeus with i. strongly 

 raised, acute, central ridge ; palpi piceous ; antennae half the length of the body black, the basal three 

 joints fulvous, the third joint twice as long as the second ; thorax about one half broader than long, the 

 sides and the posterior margin rounded, the surface obsoletely depressed on each side, flavous, opaque, 

 finelv granulate and impunctate ; elytra rather flattened, very dark bluish-black, extremely finely granulate 

 and opaque ', femora piceous at the base, their apices and the tibiae fulvous, the tarsi obscure fuscous. 



Eab. Mexico, Yolos (Salle). 



This species is distinguished by its entirely opaque and impunctate upper surface. 



14. Monolepta abdominalis. 



Black, the basal joints of the antennae, the thorax, legs, and abdomen fulvous; elytra dark blue, closely and 



distinctly punctured. 

 Length 2 lines. 



