446 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 89 



well marked. Prothorax slightly transverse, siibapically constricted ; 

 postocular lobes present. Scutellum invisible. Elytra fused, closely 

 embracing the venter, not broader at the extreme base than the base 

 of the prothorax, 9-striate, the ninth stria complete; humeri obsolete. 

 Wings absent. 



Legs with the femora shallowly, longitudinally impressed below, 

 armed at about the apical third of the outer edge of the lower surface 

 with a distinct tooth, the hind pair reaching to near the apex of the 

 elytra ; tibiae, except for the basal angulation, nearly straight, multi- 

 carinate, the uncus so situated as to appear to arise from the inner 

 apical angle, the true inner apical angle bearing a small tooth; tarsi 

 slender, the first segment as long as or longer than 2 plus 3, 2 about as 

 long as broad, about as broad as 1 and slightly larger than 3, 3 small, 

 apically emarginate but not distinctly bilobed, 5 slender and longer 

 than 2 plus 3 ; claws long and slender. 



Sternum with the pectoral canal deep and broad, naked, terminating 

 between the mesocoxae, the walls well formed; the mesosternal re- 

 ceptacle open, but the protuberant hind wall making the receptacle 

 almost cavernous, the high side walls touching the fore coxae; fore 

 coxae separated by about the breadth of a coxa, the distance between 

 the fore and mid coxae only about half the longitudinal diameter of 

 a fore coxa ; mesocoxae separated by a distance greater than the breadth 

 of a coxa; metasternum at its narrowest point between the mid and 

 hind coxae narrower than a mesocoxa, metacoxae almost twice as 

 widely separated as the mesocoxae, the metacoxal cavities subcircular 

 in outline and almost touching the elytra. 



Venter with the first two ventrites fused, subequal in length at their 

 side margins at the elytra, but the first about twice as long as the 

 second along the median line, the entire disks of the first two segments 

 occupied by a huge, deep, craterlike fovea ; ventrites 3 and 4 subequal 

 and together shorter than 5. 



Genotype. — Eurhoptod'es cratatus^ new species. 



This genus belongs in the Acalles complex. At first sight it appears 

 to be congeneric with the American Eurhoytus LeConte, 1876, because 

 of its remarkable abdominal crater. Eurkoptodes is distinct from 

 Eurhoptus^ however, because it has dentate femora and distinctly nar- 

 rower tibiae and tarsi ; furthermore the mesosternal receptacle is deeply 

 cavernous on Ewrhoptus. 



For two peculiar genera in such isolated zoogeographical regions, 

 their similarity is remarkable. Ewrhoptus appears to me to be an 

 obvious offshoot of true Acalles. I have seen no other Pacific or 

 Oriental weevils with which Ev/rhoptodes might be associated or 

 confused. 



