16 PROCEEDINGS OP THE NATIONAL MUSEUM vol.77 



thorax extends downward almost to the coxa and then is flexed back- 

 ward to the posterior corner of the coxal cavity. This is the pleural 

 suture. (Fig. 34). In front of it is the episternum and behind it 

 the epimeron. The lateral ridge extends faintly forward from the 

 pleural suture and connects with a very faint transverse line which 

 separates the episternum from the basisternite. The basisternite 

 (Fig. 35) between the coxae is acutely terminated. Its apex just 

 barely separates the coxae and meets the acute apex of the so-called 

 intercoxal piece. This piece is often triangular, but in the present 

 genus it is fused with the epimera. The posterior slope of the 

 dorsum behind the prebasal ridge is divided transversely by a lesser 

 ridge on the declivity, which laterally turns forward and meets the 

 other ridge, thus definitely defining the posttergite. The area be- 

 hind this is continuous with the epimeron and is probably the 

 postscutellum. 



Genus EURYMYCTER LeConte 



Eurymycter LeConte, Proc. Amer. Philos. Soc, 1876, vol. 15, pp. 394, 395. Type, 

 fasciatus Olivier, monotype. 



This genus has for a long time been considered to contain but one 

 species. A careful study of the series in the United States National 

 Museum has, however, revealed several species which are differen- 

 tiated by the following table. All have the prominent white band 

 across the posterior half of the elytra, and the face white. 



TABLE OF SPECIES OF BUEYMYCTBE 



1. Profile of front between eyes almost level, ocular ridge indistinct ; underside 



of abdomen clothed with white 2. 



Profile of front between eyes concave, ocular ridges strongly elevated ; under- 

 side of abdomen not densely clothed with white 4. 



2. Elytra with one elevated interval, the third; fascia very broad and more 



regular in outline than in the following species; beak lightly tricarinate; 



thoracic carina arched forward latifascia, new species. 



Elytra with alternate intervals elevated or more densely pubescent in cross- 

 ing the transverse fascia, which is irregular in outline, thoracic carina 

 almost straight 3. 



3. Beak strongly bicarinate bicarinatus, new species. 



Beak less strongly carinate, the two lateral carinae farther apart than in 



bicarinatus and with a third or median carina in the basal portion of the 

 beak fasciatus Olivier. 



4. Elytra more strikingly tuberculate, alternate intervals elevated, beak dis- 



tinctly tricarinate; thoracic carina angulate or curved backward. 



tricarinatus, new species. 



A character is evident in this genus which has not been observed 

 in the preceding genera, that is the trace of a deep suture beneath 

 the eye. This is of variable length in the genus. It is a little dif- 



