850 THE LATE MR. M. JACOB Y OX XEW [Nov. 20, 



sinuous black band ; scutellum black ; elytra strongly punctate- 

 striate, each with six small black spots (2.2.2). 



Length 4|-5 millim. 



Head strongly rugosely punctured, strongly narrowed between 

 the eyes, the vertex black ; a spot at the base of the antenna; 

 and the edge of the clypeus likewise blsck, rest of the surface 

 flavous ; eyes very large, broadly notched ; antennee black, the 

 lower three joints flavous below, third joint one-half shorter than 

 the fourth. Thorax neai'ly twice as broad as long, the lateral 

 margins very feebly rounded at the middle ; the surface ti-ans- 

 versely depressed near the anterior mai'gin, strongly but not 

 closely punctured, flavous, with a narrow more or less -^-shaped 

 black band at the middle, abbreviated at the sides. Scutellum 

 subquadrate, black. Elytra with closel}^ approached rows of 

 strong punctures, the rows often irregular with extra punctures, 

 the interstices more or less costate from the middle downwards 

 and at the sides ; each elytron with six black spots, the largest 

 of somewhat subqua,drate shape at the base, two others much 

 smaller below the middle and the smallest near the apex. Below, 

 the femora and the pygidium flavous, tibiae and tarsi black ; the 

 sides of the breast anteriorly and the metasternum posteriorly 

 sometimes likewise more or less marked with black ; prosternum 

 longer than broad, pubescent. Female with a deep abdominal 

 cavity occupying the middle of the last two segments. 



Hab. Lagos, S. Brazil. 



In general system of coloration this species agrees exactly with 

 spotted varieties of M. nigrofasciatus, M. albifrons, and M. albipes, 

 Suflf., but the coarsely punctured elytra, semiconvex interstices, 

 and the extension of the punctures to the apex does not allow 

 the identification of the species with any of those named above, 

 the more so as there are two exactly similar specimens before me. 



Metallactus argentinensis, sp. n. 



Black ; a spot on the head and the thorax fulvous or flavous, 

 the latter finely punctured, with two black stiipes; elytra minutely 

 and closely punctured and finely transversely wrinkled, black, a 

 humeral spot of subquadrate shape and a round spot at the apex 

 flavous. 



Length 4| millim. 



Head black, nearly impunctate, the vertex almost entirely 

 flavous, in shape of a large rounded patch, lower portion of face 

 rugose and closely pubescent ; labrum flavous ; eyes large, widely 

 separa,ted, broadly notched ; antennae slender, black, the lower 

 five joints flavous, the basal joint black above, third joint slightly 

 shorter than the fourth. Thorax about one-half broader than 

 long, subcylindrical, the sides rounded ; the surface rather closely 

 punctured at the sides, nearly impunctate at the middle, flavous, 

 with two longitudinal black bands from the base to the apex, 

 these meet in front and are suddenly narrowed from the middle 

 downwards, forming acute angles at each side at their widest 



