162 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 65 



rather prominent; surface broadly, transversely impressed along 

 base, and with an obsolete longitudinal impression along suture be- 

 hind the triangular green area, irregularly punctato-striate, the 

 punctures deep and coarse, and the striae somewhat confused ; inter- 

 vals densely punctate and finely rugose, the punctures irregularly 

 placed, equal in size to those in the striae and somewhat confused, 

 except on the disk. Abdomen beneath rather strongly convex, 

 rather denselj^ punctate, the punctures shallow, well separated, and 

 becoming finer toward the apical segment, and from each puncture 

 arises a short recumbent cinereous hair; intervals finely and densely 

 granulose; last segment strongly attenuate, truncate at apex, with 

 the preapical margin broadly, arcuately emarginate. Prosternum 

 very coarsely jDunctate; anterior margin truncate and declivous; 

 prosternal process nearly flat, with the apex rather broadly rounded. 



Length, 8 mm.; width, 2.25 mm. 



Type locality. — Sanchez, Dominican Republic. 



Type. — American Museum of Natural History. 



This beautiful insect is described from a single specimen loaned 

 to me by the American Museum of Natural History, and collected 

 by F. E. Watson along a creek at the foot of a mountain about three- 

 fourths of a mile north of Sanchez, Dominican Republic, between 

 May 28 and 31, 1915. 



At first sight this insect might be mistaken for a species of Agrilus 

 or Engyaulus^ but can be distinguished from these genera by the 

 characters given in the key. It is very closely allied to Mixochlorus 

 suturalis, described from Honduras by Waterhouse, but can be sepa- 

 rated from that species by having the pronotum wider in front than 

 behind, and the green sutural vitta irregular, expanded behind scu- 

 tellum and middle of elytron, and not straight as in suturalis. 



Genus PERONAEMIS Waterhouse 



Peronaemis Waterhouse, Trans. Ent. Soc. London, 1SS7, p. 178. — Kerre- 

 MANS, Wytsman's Gen. Insectorum, fasc. 12, pt. 3, 1903, pp. 145-146. 



Head feebly convex ; epistoma wide, not narrowed by the antennal 

 cavities and nearly truncate in front ; antennal cavities rather large, 

 triangular, rounded behind and prolonged into a groove in front, 

 situated under an obsolete carina at some distance from the eyes. 

 Antennae 11-jointed, rather short and slender; first joint elongate, 

 clavate and abruptly arcuate near base; second oblong, about two- 

 thirds as long as the third ; third elongate, cylindrical, feebly clavate 

 at apex, and not quite as robust as the second, the following joints 

 gradually becoming shorter toward the apical joint, triangular (ex- 

 cept the last joint, which is nearly round), strongly serrate on the 

 inner side, the serrate joints having the poriferous pores in a cavity 

 on the lower anterior margin of the joints. Eyes large, oviform, 



