STAPHYLINID^E. 171 



it seems to be confined to California; the other two genera are 

 widely diffused. 



Platandria Csy. 



In the type of this genus the mesosternal process is long, gradually 

 narrowed to an acute point, which nearly attains the coxal summit, 

 and extends over the tip of the notably long metasternal projection ; 

 the long hind tarsi have the first four joints uniformly decreasing 

 in length, the antennae slender basally, rapidly becoming strongly 

 incrassate distally, and the 5-jointed palpi and the male sexual 

 characters harmonize in type with those of Hoplandria, the fifth 

 and sixth tergites having dorsal tuberosities wholly unknown in the 

 subgroup Acrotonae of the Athetae. The hypomera and strong 

 entire cephalic carinae are as in Coprothassa and the sinuses at the 

 elytral apices are also similar; the general sculpture is more like 

 that of Hoplandria, with which it is closely affiliated. The genus 

 seems to occur from the Atlantic regions to the Pacific coast, and 

 the following are noted as thus far undescribed : 



Platandria knausi n. sp.- Rather stout and convex, shining, gradually 

 narrowed behind, the head and abdomen deep black throughout, the pro- 

 thorax and elytra similarly blackish-piceous, the latter paler along the apex, 

 the legs piceous-black; punctures well separated, fine, stronger and asperate 

 on the elytra; head slightly wider than long, subparallel and rounded at 

 the sides, the eyes at slightly less than their own length from the base; an- 

 tennae ochraceous, blackish toward apex, slender basally, the first five joints 

 elongate, the first three greatly so and subequal, the first thicker, the sixth 

 obtrapezoidal, thicker and as long as wide, thence to the tenth rapidly in- 

 creasing in size and transverseness, the last stout, rapidly pointed, as long 

 as the two preceding; prothorax transverse, only slightly narrowed ante- 

 riorly, with broadly rounded sides, much wider than the head and not quite 

 so wide as the elytral base, unimpressed; elytra moderately short, subparallel, 

 with somewhat arcuate sides, the sinuses at apex deep, the flanks projecting 

 posteriorly, the suture nearly one-half longer than the prothorax; abdomen 

 at base much narrower than the elytra, the sides converging and straight 

 to the fifth tergite, which is one-half longer than the fourth and (cf) with a 

 strong median cariniform tubercle near the apex, the sixth with a still larger 

 but flatter elongate elevation along the median line. Length 2.8 mm.; 

 width 0.78 mm. New Mexico (Cloudcroft), Warren Knaus. 



Allied rather closely to mormonica but darker in color, with 

 relatively narrower and less anteriorly narrowed prothorax and with 

 the apex of the sixth tergite in the male arcuate behind the elevation 

 and not sinuate, as it is in mormonica; the apex of this tergite in 



