MASUEIUS. 615 



1. Masurius violaceipennis. 



Testaceous; the basal and the apical joints of the antennae fulvous, the other joints black; thorax sparingly 

 punctured, bifoveolate ; elytra dark violaceous, finely and closely punctate. 



Length 2 lines. . , , 



Head broader than long, impunctate ; the eyes very prominent ; the frontal tubercles very distinct, subquadrate, 

 divided by the apex of the transversely-shaped clypeus ; antennae two thirds the length of the body, black, 

 the first and the last joint fulvous, the third joint scarcely double the length of the second; thorax trans- 

 verse, three times broader than long, the sides slightly rounded, the angles rather acute and slightly 

 produced, the surface with a few fine punctures, and a round fovea on each side ; scutellum testaceous ; 

 elytra very closely punctured, dark metallic violaceous, the shoulders bounded within by an elongate 

 depression ; the underside and the legs testaceous. 



Hab. Panama, Bugaba {Champion). 



M. violaceipennis differs from M.flavipes in the entirely testaceous head, and in the 

 colour of the antenna?, elytra, and underside ; it is also larger and broader, and the 

 thorax is bifoveolate. 



2. Masurius flavicollis. 



Piceous, the lower part of the face, the thorax, and the femora flavous, the base of the head black; elytra 

 black, with a slight violaceous tint, closely punctured, and transversely rugose. 



Var. Head flavous. 



Length 2 lines. , 



Head impunctate, black; the frontal tubercles distinctly raised, trigonate, flavous ; clypeus flavous ; laorum 

 and palpi piceous ; antennse as long as the body in the male, shorter in the female, blarck, pubescent, the 

 third joint shorter than the fourth; thorax twice as broad as long, the sides but little rounded, and 

 slightly narrowed at the base, the angles not prominent, the surface covered with fine scattered punctures, 

 flavous, shining ; scutellum black ; elytra violaceous-black, closely and distinctly punctured, the interspaces 

 transversely rugose ; legs pubescent, the femora flavous, the knees, tibiae, and tarsi more or less piceous. 



Hal. Guatemala, Zapote, Mirandilla, Sinanja (Champion). 



3. Masurius bifasciatus. (Tab. XXXIV. fig. 17.) 



Testaceous, the base of the head, the intermediate joints of the antenna, the breast, and the tibi* and torsi 

 black ; thorax strongly transverse, scarcely visibly punctured ; elytra finely punctured, subopaque, a broad 

 transverse band at the base, another below the middle, and the sutural and apical margins, black. 



Stfthl leTvery fine punctures, the vertex black, shining; the frontal tubercles transverse ; the lower 

 edge of the clypeus strongly concave-emarginate ; palpi robust, piceous ; antenna, two thirds the lengh 

 of the body ( ), the three lower and the eighth to the tenth joints flavous the others b ack, the third 

 joint more than twice the length of the second; thorax nearly three , times broader -than ^, the Bid 

 slightly rounded before the middle, the angles rather prominent, the surface with an obliqu^narrow 

 depression near the posterior angles, extremely finely granulate and punctured; scuteUum te taceous; 

 elytra very finely and closely punctured, the basal transverse band not extending to the basal margin, its 

 edges sinuate, and its sides broader than the inner portion, the second band of the same shape and 

 extending to either margin, the latter thence narrowly black to the apex; the breast and the last abdo- 

 minal segment black ; the latter in the male with a short triangular fovea at the middle of the posterior 

 margin. 



Hab. Panama, Bugaba, David, Caldera in Chiriqui (Champion). 

 I am unable to say anything about the antennae of the male, as in the two specimens 

 of that sex before me these organs are unfortunately wanting. In the transverse 



