18T3.] 4b 1 [Horn. 



but on the elytra the tendency of the paler pubescence is to form bands. 

 The elytra are triangular, the sides scarcely arcuate and very rapidly 

 narrowing to apex. The femora are armed with a strong triangular tooth, 

 and the tibiae, especially the posterior, feebly mucronate. Length .24-.30 

 inch ; 6-7.5 mm. 



Sexual characters as in caryatrypes. 



Occurs in Pennsylvania, Illinois, Kansas, Georgia, said to infest acorns 

 and hazel nuts. 



Balaninus porrectui Boh. Schonh. Gen. Cure. VII., p. 292. 

 This does not appear to belong to the genus. 



Orchestes Illig. 



The form of the hind femora will serve to make this genus readily 

 known, as in nearly all the species they are stout, and enable the species 

 to leap after the manner of the Halticides. Their facies is much that of 

 Apion. Our species are few in number, and are distinguished in the 

 following manner : 



Funicle of antennae six-jointed. 



Body above black, inconspicuously grayish-pubescent, 

 legs black, tarsi and antennae pale, ruf o- testaceous.. . . pallicornis. 

 Funicle of antenna? seven-jointed. 

 Body above black without conspicuous pubescence ; 



scutellum densely clothed with white pubescence niger. 



Body above with pubsecence forming a conspicuous 

 design. 

 Legs entirely black, pubescence of elytra sparse, an- 

 tennae pale rufo-testaceous subhirtus. 



Legs rufo-testaceous, hind femora piceous, antennae 

 pale rufo-testaceous, pubescence of elytral design 

 dense and nearly white ephippiatus. 



O. pallicornis Say. Cure. N. A., p. 16; Am. Ent. edit. Lee. Vol. I. 

 p. 280. 



Oblong oval, black, moderately shining, sparsely clothed with short 

 grayish hairs. Rostrum nearly as long as the head and thorax, sub- 

 cylindrical, coarsely but sparsely punctured near the tip. Head opaque, 

 finely granulate, and sparsely punctured. Antennae pale piceo-rufous, 

 club darker, inserted behind the middle of rostrum, funicle six-jointed, 

 first three joints moderately elongate, last three moniliform. Thorax 

 broader than long, sides moderately arcuate, apex narrower, base slightly 

 narrowed, surface sub-opaque, coarsely and rugosely punctured, feebly 

 longitudinally impressed at base. Scutellum black. Elytra oblong oval, 

 at base more than a half broader than the thorax, surface moderately 

 shining, striae feebly impressed (the sutural and second more distinctly) 

 and with moderately coarse punctures, intervals nearly flat, sparsely 

 punctate. Body beneath black, shining, abdomen moderately coarsely 



