STAPHYLINID^: 147 



asperate punctures throughout, though having the same large polygonal 

 micro-reticulation, the fifth and sixth tergites with similar close asperities; 

 color very pale flavo-testaceous, the head scarcely at all darker, the 

 abdomen with a black subapical cloud, the elytra rather more obscure 

 than either the pronotum or basal part of the abdomen; head, eyes, 

 carinae and antennae almost as in azteca, except that the antennae are 

 not quite so short, the part beyond the fourth joint less thick, more 

 slowly increasing and less abruptly dusky in color; prothorax still shorter, 

 fully twice as wide as long, otherwise nearly similar though not quite so 

 convex; elytra relatively even better developed, slightly transverse, with 

 feebly diverging sides, at base barely at all wider than the prothorax, the 

 suture nearly three-fifths longer; abdomen evidently though not greatly 

 narrower than the elytra, with straight sides, parallel or perhaps with the 

 apex of the large fifth tergite even a little wider than the first. Length 

 1.7 mm.; width 0.4 mm. Arizona (Nogales), Wickham. 



The strikingly different coloration will distinguish this species 

 from azteca, though in structural characters they are virtually 

 identical. Sexual characters are not apparent. 



Rhodeota n. gen. 



Examining Ousipalia tartarea, of my previous paper, under more 

 satisfactory conditions, reveals the fact that the hypomera are 

 horizontal and warped as in Dimetrota, to which series it really 

 belongs. It is very distinct, however, in having no infra-lateral 

 cephalic carinae. The eyes are rather coarsely faceted, the basal 

 angles of the prothorax rounded, the elytral flanks feebly prominent 

 posteriorly at apex, the apices however not sinuate, and the ab- 

 dominal impressions are nearly as in Dimetrota. The middle 

 coxae are well separated, the mesosternum coming gradually to a 

 very acute and extremely free point slightly behind their middle, 

 but not at all prolonged and separated from the transverse and 

 feebly arcuate metasternum by a long and unusually depressed 

 interval. The four basal joints of the hind tarsi are subequal. 

 The large head and broad abdomen give the type named above 

 somewhat the appearance of an Ousipalia, but it evidently repre- 

 sents a distinct Athetid genus of the Dimetrota series. 



Pseudota Csy. 



A genus containing many inconsistencies of structure and fades, 

 but distinguished as a group of species by the characters already 

 given it. From the subgenus Dimetrotina of Dimetrota, which 



