AMEllICAN COLEOPTERA. 135 



ENOPLIUM Latr. 

 E. humerale, black, opafjue, head black, finely and densely punctured ; thorax 

 black, broadly margined with yellow, slightly broader than long, shining, rather 

 finely and densely punctured, anteriorly truncate, sides and base rounded, the 

 latter slightly margined at middle, hind angles scarcely evident; elytra rather 

 depressed, obovate, truncate at base, finely granulated, and with au elongated 

 triangular humeral spot, yellow; beneath black, scarcely punctured, legs black, 

 hairy; antennae ten- jointed, tarsal claws slightly dilated at base. Length .24: 

 inch. 



One mutilated specimen from New Mexico. 



Similar in form to our A-puiuu'afum. The thorax is black with 

 rather a broad margin of yellow on each side. The yellow humeral 

 spot is triangular and includes all that portion of the elytra outside of 

 ■d line drawn from near the scutellum to a point slightly behind the 

 middle of the lateral margin. The inner margin of the spots is not 

 straight but sinuous. 



HYDNOCERA Newm. 

 H. robusta, black, faintly bronzed, robust, head coarsely and densely punc- 

 tured, thorax as long as broad, narrower behind, constricted in front, sides 

 rounded, densely and coarsely punctured, and with the elytra and head sparsely 

 clothed with rather long whitish hairs. Elytra shorter than abdomen, very 

 convex, narrowing behind, verj'- densely and coarsely punctured, and with two 

 lilrge yellow spots on each, the first basal, quadrate, and touching the suture, 

 the second cordate and behind the middle. Legs yellowish, hind pair darker, 

 nearly black except at base. Body beneath seneous-black, finely punctured 

 and sparsely clothed with white hairs. Length .25 inch. 



From Owen's Valley, California. One specimen. 



Easily distinguishable from any of our robust species by the char- 

 acters above given. 



ACREPIS Lee. 

 A. 4-signata, dark aeneous, shining, sparsely clothed with cinereous hairs; 

 head and thorax each globose, thorax narrower behind, truncate and slightly 

 margined, moderately densely punctured; elytra bluish-green, subcylindrical, 

 parallel, broader than the thorax, roughly punctured, each elytron with two 

 I'eddish spots, the first round and humeral, the second crescentic, subapical. 

 Length ..30 inch. 



Collected near San Francisco, Cal. Cabinet of Mr. H. Ulke. 



The occurrence of this species enables us to pronounce on the va- 

 lidity of the genus. It appears to be abundantly (^istinct from all the 

 others genera of Psoini. In addition to the characters given by its 

 author, the following may serve to render the description fuller : — 



Head free. Antennae ten-jointed, longer than head and thorax, first joint 

 thick, cylindrical, second short, rounded, as broad as first, joints 3 — 7 short, 

 equal, narrower than the second, last three joints broader, flattened, forming 

 a loose club, of which the first two joints are broadly oval, the last more elon- 

 gate, flattened and emargiuate in front near the tip. Anterior coxae not con- 



