NORTH OF MEXICO. 



391 



A. oliviuoides, brownish testaceous, sub-opaque. Thorax more densely punctured and more densely pilose 

 broader Mian long, sub-globose, slightly depressed, sides moderately rounded from apex to base; base rounded. Elytra 

 elongate oval, sub-depressed, sides feebly rounded, apex obtuse, surface moderately coarsely punctured and sparsely 

 clothed with short yellowish recumbent hairs. Beneath testaceous, rather densely and coarsely punctured and sparsely 



pilose. 



Length . 14 inoh. 



Owens' Valley, California, rare. 



Differs from both the preceding specie3, by its color, morn depressed form, and by the 

 shape of the thorax. In this species the sides arc gradually rounded from the apex to 

 base, and the base is not prolonged as in the other species, and is comparatively broader. 

 The elytra are less convex, more elongate, sides less rounded, and apex less acute. 



TRIBE XXX — HELOPINI. 



Labrum prominent, clypeal membrane always visible; last joint of palpi securiform; 

 head usually more or less prolonged behind the eyes ; antenna 1 with the outer joints flat- 

 tened sub-triangular j last joint usually longer than the preceding ; elytra feebly embracing 

 the body; epipleuno entire ; legs usually long; anterior coxee globular; tibial spurs fre- 

 quently very small; tarsi densely pubescent beneath, the anterior and often the middle 

 dilated in the mdes; iutercoxal process broad or oval, never acute at tip; body either 

 apterous or winged. 



EBLOPS, Fab. 

 Helops, Fab., Ent. Syst, p. 857. 



One genus represents this tribe in our fauna. Our species are numerous and may lx 

 divided in the following manner: 



< Oiori' i — Mate Species. 



Thorax sub-quadrate, sides feebly rounded; apex (except in impolitus) emarginate; angles all prominent. 

 Thorax emarginate at apex; elytra sub-metallic; shining. 



Sides of thorax not undulated; elytra finely striate, interstices finely ami sparsely 



punctured. micans. 



Sides of thorax undulated; elytra,! striee deeper. undulatus. 



Sides of thorax not undulated; elytra,! striee deep; interstices convex, almost en- 

 tirely impunctured. venustus. 

 Thorax truncate in front; angles reotangular; surface sub-opaque; elytra with rows of 



elongate punctures. impolitus. 



Thorax usually broader than long; sides moderately rounded; apex truncate or rounded 

 with obtuse angles. 

 Anfeuiue with the outer joints compressed and sub-triangular. (Black, sub-opaque, 

 California species.) 

 Thorax narrowed at baS3. 



Thorax; wider at base, 

 Antenna! slender, outer joints not compressed. 



o p a c u s . 



pii nc tipen n i s 

 r u gulosus. 



