new Cerambycidse ./rom Ecuador. 487 



what compressed, subparallel, the four posterior furnished at 

 the apex with a strong spine. 

 Hah. Sarayacu. 



Catokthontus, n. gen. 



Head deflexed in front almost at right angles with the 

 forehead ; the muzzle nearly as long as broad, parallel seen 

 from the front; antennal tubercles a little elevated on the inner 

 side like two ridges between the antenna?. Antenna? short ; 

 the second joint a little longer than broad, the third joint as 

 long as the first and second together, the fourth scarcely more 

 than half the length of the third, the following joints subequal. 

 Eyes deeply emarginate above. Thorax a little broader than 

 long, very convex and arched anteriorly, a little constricted 

 at the base, and very deeply transversely impressed above the 

 base. Elytra at the base a little broader than the thorax, and 

 three times the length, meeting at the suture for more than 

 half their length, beyond the middle rapidly acuminate, so 

 that the apices are widely distant from each other. Anterior 

 coxa? nearly globular, only very slightly conical, moderately 

 raised above the prosternal process, which is very narrow and 

 arched. The mesosternal process is moderately broad, slightly 

 arched anteriorly. Metathoracic episterna very broad, straight 

 on the inner side (i. e. parallel with the middle of the ster- 

 num), arcuately narrowed (from the outside) posteriorly. Ab- 

 domen not narrowed at the base. Femora pedunculate, much 

 swollen at the apex. 



This genus appears undoubtedly to belong to the Rhinotra- 

 gina?, but differs from all the genera of that subfamily in the 

 form of the thorax, which recalls Clytellus (Tillomorphina?), 

 and in the form of the metathoracic episterna, which are nar- 

 rowed from the outer margin, not from the inner. 



I propose placing it before Ommata. 



Catortkontus collaris, n. sp. 



Flavus ; capite thoraceque nigro lineatis ; elytris fortiter punotatis, 

 singulis ad basin nodo nitido, ante medium strigis binis fuscis, 

 apice acuminato piceo, extus carinato. 



Long. 6 lin. 



Antenna? short, about the same length as the elytra, pitchy, 

 darker in the middle, the apical joints gradually becoming a 

 little more slender, the third and two or three following 

 joints sparingly fringed above ; each joint with a long stiff 

 hair at its apex. Head with a stripe below each eye, two 

 stripes in front, the inner angle of the antennal tubercle, a 

 stripe across behind the eyes, and the back part of the head 



'33* 



