STAPHYLINID^E. 7 



thorax, the suture equal in length to the latter, the punctures somewhat 

 coarse and subasperate but rather well separated; abdomen with numer- 

 ous subasperate punctures, the sixth tergite (cf) densely asperate 

 throughout, truncate with broadly rounded angles, the edge throughout 

 with strong close-set asperate and setose punctures, the sixth ventral 

 plate short, broadly angulate and briefly fringed at apex. Length 

 (extended) 3.0 mm.; width 0.68 mm. California (Dunsmuir), Wick- 

 ham. 



Allied rather closely to verna Say, but much more slender than 

 any of an extensve series of that species before me, from all parts of 

 the country, and with a relatively much larger head. 



Maseochara Sharp. 



Tithanis Csy. 



The following species was overlooked in drawing up my revision 

 of this genus (Tr. St. Louis Acad. Sci., XVI, p. 168): 



Maseochara musta n. sp. General characters, coloration, sculpture 

 and pubescence as in puberula but very much narrower in form, black, 

 the elytra each very feebly suffused with dark rufo-piceous broadly 

 toward the suture except basally, the legs dark red-brown; head nearly 

 circular, the eyes moderately convex and at one-half more than their 

 own length from the base, the antennae thick and gradually incrassate, 

 as long as the head and prothorax, black, the first three joints dark 

 red-brown, the outer joints rather strongly transverse, obtrapezoidal, 

 the last obtusely ovoidal, fully as long as the two preceding; prothorax 

 a third wider than long, two-fifths wider than the head, widest before 

 the middle, the sides broadly arcuate, straighter and converging toward 

 base, which is rounded and about as wide as the apex; median line finely, 

 feebly impressed anteriorly; elytra strongly transverse, the sides rounding, 

 especially toward base, evidently wider than the prothorax, the suture 

 three-fourths as long as the latter; abdomen long and parallel, fully 

 as wide as the elytra, shining, the tergites with rather strong and moder- 

 ately close punctures, less evident toward their bases, Length 4.0 mm.; 

 width 0.85 mm. Southeastern Arizona (probably near Benson). 



v 



Distinguishable from puberula at a glance by its very much more 

 slender form, relatively smaller head and prothorax and somewhat 

 shorter elytra. 



Rheobioma Csy. 



There are evidently a number of species of this hitherto mono- 

 typic genus in the more southern parts of the Sierra system; the 

 following is about as stout as disjuncta but has much longer and 

 heavier antennae: 



Rheobioma terrena n. sp. Stout, rather convex, fusoid, somewhat 



