CARABID.E. 13 



A fossil species from Wyoming, formerly described by me as a Cychrus, 

 has been fomid to belong to the Carabini. 



The existing species of the genus, which are numerous, are mostly 

 found in north temperate America and Europe. 



Cychrus wheatleyi. 



Cychrus wlieatleyi Horn, Trans. Am.' Ent. Soc, V, 242 (1S76); Scudd., Tert. Ins. 

 N. A., 536-537, pi. 1, fig. 1 (1890). 



Bone caves of Pennsylvania. 



Cychrus minor. 



Cychrus {minor) Horn, Trans. Am. Ent. Soc, V, 243 (1876). 

 Cychrus minor Scudd., Tert. Ins. N. A., 537-538, pi. 1, fig. 2 (1890). 



Bone caves of Pennsylvania. 



NOMARETUS LeConte. 



As existing to-day, this is a genus with few species, confined to the 

 United States east of the Rocky Mountains. No other species than the one 

 here described has been found fossil. 



NOMARETUS SERUS Sp. nOV. 

 PI. I, fig. 1. 



About the size and of much the general appearance of N. imperfectus 

 Horn. A single well-preserved specimen, showing nearly all the parts of 

 the body. It has a remarkably broad and little elongate head for this 

 group, but the whole form, the character of the appendages, and the deeply 

 cleft labrum indicate this place for it. The head is fully three-quarters as 

 broad as the thorax, tapering' rapidly in front of the somewhat jirominent 

 eyes, so that the labrum is rather less than half as wide as the head,' and 

 before the labrum about as long as broad. The labrum is somewhat 

 obscure, but it is apparently two-thirds as long as broad, very deeply 

 and widely cleft. Mandibles moderately stout, finely pointed, and rather 

 strongly hooked. Maxillary palpi moderately slender, about a third as 

 long as the antennae, tlie penultimate joint gradually enlarged at the apex, 

 the last joint subtriangular, angulate in the middle, twice as long as broad 



