458 Coleopterological Notices, IV. 



Second abdominal segment but slightly longer than the third, the basal seg- 

 ment not more coarsely punctate but having in addition to the finer punc- 

 tures others much larger and widely scattered. Head and beak roughly 

 and densely squamose, the former strongly, transversely impressed ; beak 

 not quite as long as the prothorax, feebly bent, roughly and densely sculp- 

 tured ; antennae inserted just beyond apical third, the second funicular 

 joint but slightly shorter than the first, equal to the next two together, 

 outer joints but slightly wider, club long, distinctly annulated. Protho- 

 rax very nearly as long as wide, angulate at the sides before the middle, 

 the disk very uneven, the median impression broad and feeble ; punctures 

 very dense but even and rather fine. Elytra about twice as wide as the 

 prothorax, not longer than wide ; intervals alternately strongly ridged 

 and flat ; punctures coarse and rather uneven. Length 5.4 mm. ; width 

 3.0 mm. Arizona Jmllatus n. sp. 



Bullatus is larger and relatively broader than undatus. The 

 vestiture in the single specimen before me is somewhat imperfect, 

 but appears to be of the same general character as in undatus; the 

 latter is moderately abundant from New York to Texas. 



Zygoplnt. 

 PSOMUS n. gen. 



A distinct genus is rendered necessary for one of the most minute 

 zygopicles which I have seen. Its principal characters are the fol- 

 lowing : — 



Body small, oval, convex, somewhat resembling Orchestes. Eyes large, 

 finely faceted, narrowly separated on the front. Beak somewhat slender, 

 received in repose in a moderately deep prosternal sulcus, thence passing 

 over, but scarcely upon, the mesosternum. Antennae very slender, the fnnicle 

 long, filiform, the basal joint rather longer than the next two ; second longer 

 than the third ; outer joints but slightly thicker ; club very small, moderately 

 thick, oval, not noticeably annulate. Mesosternum depressed, flat, very widely 

 separating the coxae. Met-episterna rather narrow, parallel, interposed be- 

 tween the posterior coxae and the elytra. Abdomen nearly flat, the sutures 

 straight, transverse, all deep and strong, the segments subequal in length. 

 Pygidium completely covered. Legs moderate, the tibiae and tarsi very short ; 

 tarsal claws small, divergent, bent downward near the base and obtusely 

 toothed or lobed within. 



The systematic position of Psomus is evidently near Acoptus, 

 with which it agrees in sternal structure ; the facies is however 

 completely different, and structurally it differs in its very slender 

 antennas with small non-annulate club, short tarsi with the claws 



