576 MR. M. JACOBY ON NEW [NoV. 1, 



following joints together ; claws appendiculate ; the prosternum very 

 narrow, coavex between the coxae ; the anterior coxal cavities open. 



Malacosom\ flavicorne, n. sp. (Plate XXXIX. fig. 12.) 

 riavous ; the clypeus, thorax, tlie apex of the femora, and the 

 abdomen black ; thorax closely punctured; elytra flavous, punctured 

 like the thorax- 

 Length 2| lines. 



Head impunctate, pale fulvous, the frontal elevations narrowly 

 transverse ; the clypeus black ; antennae fulvous, rather robust, the 

 third joint one half longer than the second, the fourth as long as 

 the preceding two joints together ; thorax about twice as broad as 

 long, the sides rounded, the anterior angles slightly produced, the 

 posterior ones ratlier obsolete, the surface rather strongly and closely 

 punctured, black; elytra flavous, very closely punctured; the a[)ex 

 of all the femora black ; tibiae mucronate, the first joint of tlie pos- 

 terior tarsi as long as the following two joints together ; claws 

 appendiculate ; abdomen black, pubescent ; prosternum very narrow 

 but distinct, convex. 

 A single specimen. 



Antsianaka viridis, n. sp. 



Testaceous ; the antennae, the abdomen, and the tibiae and tarsi 

 black ; the head and thorax impunctate ; elytra metallic green, 

 finely punctured and transversely rugose. 



Length 2 lines. 



Head with a more or less distinct depression at the vertex, the 

 latter with a faint metallic hue, impunctate ; labrum black ; antennae 

 as long as tlie body, very slender, black, all the joints with the ex- 

 ce])tion of the second very elongate ; thorax short, without a distinct 

 lateral margin, the surface impunctate, with some shallow transverse 

 de|)ressions, testaceous ; scutellum bbick ; elytra bright metallic 

 green, finely transversely rugose, and closely punctured. 



Closely allied to A. pulchella, Uuviv., but differing in the pale 

 head, the absence of the green llioracic margin, the entirely green 

 ehtra, and the black abdomen. 



Antsianaka longicornis, Duviv. 



I refer a single specimen to this species ; my specimen differs, 

 however, from the description in having an entirely testaceous head. 

 M. Buvivier does not mention the colour of the antennae, wliich 

 are fuscous in my specimen with the basal two joints black. 



Antsianaka elegantula, n. sp. (Plate XXXIX. fig. 10.) 



Pale flavous ; antennae (the basal two joints excepted) black ; 

 el\tra metallic blue, narrowly margined with flavous, rather strongly 

 jiuncturt'd ; the interstices finely transversely rugose. 



Length 1| line. 



Smaller than any of its allies, the antennae extending beyond the 

 elytra, entirely black, with the exception of the first two joints, 

 which are flavous ; the head swollen, impunctate ; the thorax very 



