1876.] MR. M. JACOBY ON NEW COLEOPTERA. 809 



agrees in size, shape, and coloration above entirely with A. rufus, 

 Lac, bnt differs in the following particulars : in rufus the entire 

 underside and legs are testaceous, with the exception of a few black 

 spots on the abdomen, while in dubiosus these parts are shining- 

 black, with the exception of the tibiae and tarsi, which are ferru- 

 ginous ; in rufus the scutellum is of the same colour as the body, 

 while in dubiosus it is entirely black ; and although this species may 

 only be a variety of rufus, I find no mention made of it in Lacoi- 

 daire's description. 



Two specimens from Mexico in my collection. 



Family Clythrin^e, Lac. 

 Genus Megalostomis, Lac. 

 4. Megalostomis basilaris, sp. nov. 



Short, ovate, subdepressed, flavous, sparingly pubescent above, 

 strongly beneath. Head black, pubescent, shining, closely punctate, 

 striated near the eyes, leaving only a narrow space in the middle of 

 the vertex smooth, two large depressions divided by a raised mid- 

 dle line in front of the eyes, the latter light-coloured. Antennas 

 dentate from the fifth joint, reaching to the base of the thorax. 

 Posterior angles of thorax indistinct, anterior ones produced, the 

 sides widened from before the middle towards the base, rounded, 

 the median lobe at the base largely rounded ; the entire surface 

 closely punctured and covered with whitish pubescence, sparingly 

 on the disk, closely near the sides ; two large red spots occupy 

 almost the entire sides, but are partially covered with hairs, and 

 therefore only plainly visible near the base, where the pubescence 

 is less dense. Elytra a little wider at the base than the thorax, 

 closely and confusedly punctate, a little finer near the apex, the 

 punctures showing a tendency to arrange themselves in striae near 

 the suture ; the whole surface sparingly covered with stiff whitish 

 hair ; exactly on the shoulder of each elytron is a round black spot, 

 the extreme base of the elytra, as well as the sutural line, is also nar- 

 rowly edged with black. Entire underside reddish, densely covered 

 with white pubescence ; femora and tarsi black ; tibiae testaceous. 



Length 4 lines. 



Hab. Peru. 



A single specimen in my collection. 



5. Megalostomis amazona, sp. nov. 



Ovate, of same shape as basilaris, light brownish above, finely 

 pubescent, beneath thickly clothed with yellowish hair ; head 

 divided in the middle by a longitudinal raised line, closely punctured 

 and pubescent, posterior margin of epistome dentate, anterior 

 einarginate in middle ; jaws and antennae black, eyes brown ; thorax 

 shaped exactly as in the preceding species, densely covered with 

 golden yellow hair, which also extends to the scutellum ; elytra 

 about two and a half times the length of the thorax, reddish brown, 



