Casey — Observations on the Staphylinidae. 419 



neath; antennae much longer than the entire head, the ba'^al joint alone 

 exceeding half that length, the outer joints incrassate and compactly 

 joined, the tenth almost twice as wide as long; prothorax nearly three- 

 fourths longer than wide, very much narrower than the head, the sides 

 only feebly converging, the apical angles broadly rounded, the punctures 

 small but deep, circular, close-set but evidently separated, the inter- 

 spaces polished, the impuactate median line moderate in width and 

 well defined; elytra elongate, equal la length to the prothorax though 

 much wider, but not quite as wide as the head, finely but strongly, 

 unusually closely punctate; abdomen parallel or very nearly so, 

 sligatly narrower than the elytra. Length 5.3-6.0 mm.; width 0.8-0.85 

 mm. Ohio (Cincinnati), Iowa and Texas (Galveston). 



rubripennis Lee . 



Differs from the European nothus Er., in its larger size 

 and somewhat stouter form, larger and more elongate, red 

 eljtra, which in that species are much shorter than the pro- 

 thorax and piceous-black throughout, in its more strongly in- 

 crassate antennae with still more elongate basal joint and in 

 the male sexual characters, the tip of the sixth ventral being 

 broadly sinuate toward the middle and not rectilinearly 

 truncate. The apex of the abdomen is rufous in ruhripennis 

 but not noticeably paler in nothus. 



Microlinus n. gen. 



But little can be said of this genus at the present time, as 

 the original type is a unique in very fragile condition. The 

 description given by Dr. LeConte is as follows: — 



V«ry small, slender, pale yellow, shining; head rather convex, nearly twice 

 as long as its width, smooth, with a few small scattered punctures 

 each side; sides nearly parallel, the base truncate; hind angles nar- 

 rowly rounded; under surface very sparsely punctured; prothorax not 

 longer or narrower than the head, with a few scattered punctures each 

 side; elytra sparsely, finely punctured, the sutural stria very fine; ab- 

 domen sparsely punctured and pubescent. Length less than 2 mm. 

 South Carolina (Columbia) , — Dr. Zimmermann pusio Lee. 



The remarks under this description state that the palpi, 

 antennae and front tarsi are just as in Leptolinus ruhripennis^ 

 but that whether the middle coxae are separate or contiguous 

 cannot be determined on account of the condition of the 

 type. That the genus is different from Leptolinus admits 



