464 bulletin: museum of comparative zoology. 



this character is in doubt. Prothorax broader than long, arcuate at 

 sides. Elytra long and narrow, apex without defined spine, but the 

 stone is too rough to allow of certain judgment. Legs slender, thighs 

 but little clavate. Length, 10.50 mm. 



Described from one specimen. 



Type.— Ko. 2,584 M. C. Z. Florissant, Col. (No. 11,289 S. H. 

 Scudder Coll.). 



The generic determination rests upon the facies. The form is that 

 of the North American species of Stenosphenus, in fact the resemblance 

 is so striking as to be manifest at the first glance. The stone on which 

 the insect is shown is of such rough texture that the margins of the 

 impression are all more or less blurred and it is impossible to be sure 

 of the presence or absence of spines upon the antennae, knees, or 

 elytra. The sculpture is entirely efi'aced. Because of the charac- 

 teristic form of the beetle, I have thought it worth figuring and naming. 



Clytus florissantensis, sp. nov. 

 Plate 10, fig. 1. 



Form stout for this group. Head decidedly narrower than the 

 prothorax, and, including the projecting mandibles, as long as wide. 

 Mandibles subtriangular in outline, the external margins moderately 

 strongly and regularly arcuate, their length equal to about one half 

 that of the head. Cephalic sculpture rather weak, consisting of a not 

 very close granulation and rugosity. Antennae incompletely pre- 

 served, but in life evidently reaching beyond the elytral tips, though 

 not far, if at all, past the end of the abdomen, the first joint clavate, 

 not very elongate, the second small, third distinctly longer than the 

 fourth which is somewhat shorter than the fifth or sixth, the remainder 

 incomplete or wanting, though a detached distal joint lying across one 

 wing-co\'er indicates that those near the apex were somewhat greater 

 in length. The third, fourth, and sixth joints, each show a strong 

 inner apical spine. Eyes not definable. Prothorax much broader 

 than the head, distinctly wider than long, and, owing to the strongly 

 rounded sides without lateral spines, roughly transversely suborbicu- 

 lar in outline as is commonly the case in this group. Surface more 

 strongly sculptured than the head, the sides with closely set regular 

 circular granules of moderate size which become sparser and smaller 

 on the disk and pronouncedly so on the anteromedian area. There 



