junei 9 oo.] Casey: On North American Coleoptera. 165 



Individuals of the various species appear to be abundant, and the 

 genus, both in number of species and relative abundance, is much 

 better represented in America than in Europe. Niger of Rossi, 

 (= glabratus Fabr. ), is the only European species, and its occurrence 

 in this country has not been confirmed. 



ClOID^E. 



Maphoca, gen. nov. 



The genus based upon the following characters may be placed for 

 the present near Plcsiocis. The body is narrow, parallel and moder- 

 ately convex. Head well developed, wider than long, only moder- 

 ately inclined, the eyes slightly behind the middle, remote from the 

 base, moderate or rather small, entire, convex, relatively rather coarsely 

 faceted, the facets individually strongly convex ; front broadly and 

 evenly arcuate from eye to eye, with a small transversely oval inclosed 

 clypeus defined by a very feeble suture, the labrum small, rounded. 

 Antennae inserted under the sides of the front immediately before the 

 eyes, short, 9-jointed, with a moderately developed loose parallel 

 2-jointed club, the two basal joints enlarged; three to six forming a 

 slender shaft ; third as long as the next two combined ; four to six 

 small, moniliform, the seventh transverse and wider. Maxillary palpi 

 well developed, the last joint large, oval, slightly longer than wide, 

 narrowly truncate at tip, the labial very minute; buccal opening 

 small, the mentum very minute, longer than wide. Antennal grooves 

 before the eyes rather distinct, the buccal processes almost obsolete ; 

 mandibles short and stout, bifid at tip. Prothorax widest toward 

 apex, the disk even, throughout and slightly convex ; presternum long 

 before the coxae, broadly truncate, the intercoxal process narrow. 

 Elytra completely enclosing the abdomen, striato-punctate. Scutel- 

 lum small, transversely oval or broadly angulate behind. Abdomen 

 with five perfectly mobile segments, the sutures straight throughout, 

 the first segment unmodified, as long as the next two combined ; two 

 to four decreasing scarcely visibly in length, the fifth scarcely longer 

 than the fourth and rounded. Anterior coxae small, very deep- set, 

 transverse, the cavities narrowly open behind and angulate externally ; 

 intermediate and posterior narrowly separated, the latter extending 

 nearly to the sides of the body, the met-episterna extremely narrow. 

 Mesosternum even, transversely convex, the metasternum large. Legs 



