NATURAL SCIENCES OP PHILADELPHIA. 569 



ture. The head is much depressed, and very broad, constituting somewhat 

 less than one-fifth of the total length. The mouth is small, and has the upper 

 jaw the longer. The maxillar barbies extend a slight distance beyond the 

 branchial aperture. The eye is of medium size, circular ; its diameter enter- 

 ing six times in the length of the side of the head ; the orbits are nearly four 

 diameters apart. The spine of the dorsal fin is perfectly smooth ; and the spine 

 of the pectoral very coarsely serrated. The caudal fin is moderately forked. 



5 



The numbers of the fin rays are D, 1-6. P, 1-10. V, 8. A, 24. C, 27- 



5 



Color. In alcoholic specimens, the head, back and upper half of the sides are 

 bright sienna; the belly silvery white. Margin of the dorsal, caudal, and anal 

 fins, glossy black ; the marking on the anal broader and not so deep. Numer- 

 ous small, circular black spots are scattered irregularly over the budy, in ap- 

 pearance similar to those, of the Trout (S.fontinalis), except in color. 



Habitat. Fort Reily, Kansas. 



This species is named in honor of Dr. Wm. A. Hammond, who has presented 

 the Academy with many new and valuable western fishes. 



2. Pimelodns notatus, Abbott. Spec. char. The head and body are 

 very much compressed, and the body tapers rapidly to the tail. The peduncle 

 of the tail is slender and increases in width as it approaches the insertion of the 

 fin. The facial outline is very oblique, and with the dorsal outline makes con- 

 siderable curvature, from the anterior insertion of the dorsal fin to the extrem- 

 ity of the upper jaw. The eyes are large, situated equidistantly between the 

 extremity of the upper jaw and margin of the opercle ; the diameter of the orbit 

 is contained four times in the length of the side of the head. The spines of 

 both dorsal and pectoral fins are finally serrated. The anterior insertion of 

 the dorsal fin is equidistant between the insertions of the pectoral and ventjal 

 fins. The extremities of the rays of the pectoral extend to the insertion of the 

 ventral fins. The extremities of the rays of the ventral extend beyond the an- 

 terior insertion of the anal fin. The anal fin is large ; the base equal to one- 

 fourth of the total length. The caudal fin is very deeply forked. 



The numbers of the fin-rays are D, V, A, C. 



Color. In alcoholic specimens, the head and back are umber color; sides and 

 belly yellowish, with metallic lustre. A circular black spot exists at the 

 origin of the lateral line. 



Total length seven inches. 



Habitat. Fort Reily, Kansas. 



Dr. Wm. A. Hammond has presented the Academy with a single specimen of 

 this Pimelodus. 



Descriptions of new North American Coleoptera, in the Cabinet of the 

 Entomological Society of Philadelphia. 



BY GEO. H. HORN. 



NOMARETUS Lee. 



N. imperfectus . Black, smooth and glossy ; antennae and palpi rufous ; 

 thorax cordate, canaliculate, narrowed posteriorly, with a slight transverse 

 and rather deep basal impression; elytra each four striate, stria? punctate, 

 and decreasing in length from the suture outwardly, fourth stria obsolescent, 

 the arrangement of the strias forms an oblong space, which is slightly flattened, 

 sides of elytra smooth and glossy. 



Length -40. 



Plate 8, fig. 1. 



This beautiful little insect, of which but few specimens have been obtained, 

 has been found only in Hampshire county, Virginia, in the most rocky portions 



I860.] 



