of the Royal Physical Society. 283 



dric ; the fourth increases in breadth as far as the ferruginous 

 colour extends, it then suddenly becomes straight and com- 

 pressed, and the two sides run parallel to each other ; the re- 

 maining joints are in like manner compressed, and the sides 

 parallel ; each of them is very slightly broader than the preceding, 

 but the slender joints at the base, compared with the broader 

 remainder, give the antennae a decidedly claviform appearance ; a 

 groove runs up the middle on each side of the flat joints ; the 

 two last joints of the maxillary palpi and the apex of the man- 

 dibles are a little deeper in colour than the rest of the body. 

 The head is smooth, with a very slight depression on each side 

 in front. Clypeus rather projecting. Labrum moderate, broader 

 than long, straight in front. Mentum without a middle tooth. 

 Thorax with sides strongly reflexed, and with a dorsal channel 

 and some slight wrinkles across the disk ; the production of the 

 posterior margin in the middle not so prominent as in some 

 species. Elytra very convex and swollen, having much the form 

 of the elytra in Lia, smooth and shining, and with nine rows of 

 slender striae, besides the commencement of a short sutural stria 

 at the base, all slightly but distinctly punctate ; interstices im- 

 punctate, but with two large and deep impressions on the inner 

 side of the third stria, the one a little more than a fourth of 

 the length of the elytra from the base, and the other about a 

 similar distance from the apex, and near the margin a row of 

 round impressions running along the interstice between the 

 eighth and ninth striae, and one opposite the end of the third 

 stria, each impression having a raised point in the centre ; the 

 apex of the elytra is broadly truncate, the truncation sinuate. 

 From the semitransparency of the elytra, the impression of the 

 folding of the wings below is seen, occasionally giving the appear- 

 ance of something like a device on the elytra, but in reality 

 they are concolorous. The scutellum is elongate-triangular. 

 The under side is smooth and shining ; the legs a little darker 

 in colour than the body, with the apex of the thighs, the apex 

 of the tibiae and the whole of the tarsi black or piceous black ; 

 penultimate joint of tarsi deeply lobed ; claws pectinate. 



The much-swollen elytra and the almost claviform antennae of 

 this species at first induced me to think that it might properly 

 be made the type of a new genus ; but as in all other respects it 

 agrees with Lebia, as at present defined — unless perhaps that 

 the terminal joint of the palpi is almost ovular, while in Lebia 

 it is truncate — I have not been able to justify to myself such a 

 separation, these being points on which we find gradations 

 existing in a greater or less degree among the different species 

 of Lebia. 



