NORTH OF MEXICO. 



369 



ALPHITOBIUS, Steph. 



Alphitobius, Stephens, Must. Brit. Ent. V, p. II. 



A. diaperinus, Panzer, (Tenebrio); Wollaston, (Alpliitobius). 

 A. piceus, Oliv., (Helops); Muls., (Alpliitobius). 



These two insects are not natives of our country, and therefore require no special men- 

 tion. For full description, both of genus and species, the student is referred to the works 

 on the species ol' the various European loeal fauna'. Large numbers are occasionally 

 brought in vessels from various parts of the world. A few years since a, vessel arrived at 

 Philadelphia from Sierra, Leone, tin; cargo of which was plentifully overrun by tin; latter 

 species. As far as I cm discover, all tin; specimens found are direct importations, and 

 they do not appear to propagate. 



CYN^EUS, Lee. 

 Cyneeus, Lee, Gen. Col. N. A., p. 288. 



The eyes are rather large and convex, deeply emarginate in front,, slightly behind ; 

 inferior portion of the eye large. Antennee with the third joint nearly equal to fourth 

 and fifth; joints five; to ten transverse, last joint oval. Hind tarsi slender, first joint long. 



0. angustus, Lee, (Plalydema) Ann. Lye. V, 149. 



Thorax broad, equalling one-and-a-half times the length, emarginate in front, sides 

 strongly rounded, not narrowing in front, as broad as the elytra. Elytra feebly striate, 

 stria? punctured, interstices feebly convex, densely and finely punctured. 



Length. .20-.22 inch. 



Found in the Colorado Desert of California, probably near Vallecito. 



0. de p re a sus, n. sp. 



Differs from the preceding as follows: Thorax less transverse, nearly truncate at apex, 

 sides very feebly rounded, narrowing in front, Base narrower than the base of elytra, 

 Strise of elytra not deep, more evident at apex, interstices more sparsely punctured. In 

 both species the head and thorax are rather densely, hut not coarsely punctured. 



Length .22-.30 inch. 



Occurs in the southern Coast Ranee of California. 



METACLISA, Duval. 



Metaolisa, Duval, Gen. Col. Europe. Ill, p. 3'.)<i. 



In this genus the mentum is distinctly trilobed in front, the middle lobe prominent, 

 lateral lobes indexed. The anterior tibial are slender, the epipleunc short and the first 

 joint of the hind tarsi not longer than the two succeeding joints together. 



M. marginalia, pioeous black, shiningj elongate oval, aub-parallel. Head slightly broader than long, feebly 

 emarginate in front, coarsely but, not densely punctured, epistoma paler and the more finely and densely punctured. 



AMUHT. I'lllLOSO. SOC. VOL. XIV.— 03 



