1S2 Mr. C. 0. Waterhouse's new 



Autarcontes abdominalis, n. s. 



Niger; elytris inter costas aenescentibus imuiacnlatis, fascia 

 anguste ante apicern e pube grisea ornatis ; corpore subtus cyaneo, 

 maculis coccineis ntrinque ornato. Long. 17 mm. 



This species mncli resembles the preceding, and has the thorax 

 acutely angular at the sides in the same way, closely punctured. 

 The impression on the disk, which in the preceding species is 

 somewhat trefoil in shape, is more distinctly divided into three 

 impressions, of which the anterior one is small. The dorsal 

 region of the elytra is slightly tinted with brassy ; the sides and 

 apex black, the apex with a fascia of grey pubescence. The red 

 spot on the basal (2nd) segment of the abdomen is large and 

 transverse ; those on the three following segments are a little 

 smaller (but larger than in the preceding species), each with a 

 smooth oval spot at the base. Posterior tarsi long. 



Hub. Nicaragua, Cbontales \T. Belt). 



Omochyseus, n. g. 



General characters of Agrilus. Thorax transversely quadrate, 

 deeply excavated on the disk. Scutellum triangular, broad at the 

 base, gradually acuminate. Elytra not much narrowed posteriorly, 

 each with a single costa ; the shoulders much elevated into a sort 

 of curved costa ; the apex suddenly obliquely inclined, forming a 

 distinct but obtuse angle with the dorsal line of the elytra. 



I propose this name for a Brazilian insect closely 

 allied to Agrilus, but which, from its peculiar form, 

 I think merits generic distinction ; the chief characters 

 being the much elevated shoulders of the elytra, and the 

 suddenly inclined apex. 



Omochyseus humeralis, n. s. 



Niger, vix purpurascens ; pectore abdomineque cyaneis, pedibus 

 cupreis ; capite profunde excavato ; thorace transverso, quadrato, 

 disco fortiter improsso, transversim strigoso, antice guttis duabus 

 elevatis nitidis instructo; lateribusdeclivibusrugulosis, guttis duabus 

 nitidis elevatis instructis ; scutcllo elongato triangulari ; elytris 

 sicut armorajiis, confertim subtiliter punctatis, guttis 



numerosis irregularibus parum elevatis riatim dispositis, 



fascia post-medium nigro-velutina; apice ipso inclinato ntrinque 

 arcuatim paulo dilatato ; singulo elytro unicostato ; humeris bene 

 elevatis. Long. lHnmi. 



