100 AMERICAN COLEOPTERA. 



Capron, Florida (Hubbard and Schwarz). 

 The five species of Creniphilus with 7-jointed antennae are 

 readily separated as follows : 



Prothorax and elytra with sharply defined pale margin which is broader 

 behind. 



Punctuation fine and sparse (California) elegans. 



Punctuation much coarser and closer (Alabama) lodingi. 



Prothorax and elytra gradually suffusedly paler at sides. 



Form less convex, upper surface polished throughout and finely 



punctate (Arizona, var. nanus Florida) ellipsis. 



Form more convex, elytra with alutaceous sculpture. 

 Prothorax minutely sparsely punctate, elytra relatively coarsely 



punctured (Florida) reductus. 



Prothorax distinctly moderately closely punctate, elytra without 

 punctures (Florida) degener. 



STAPHYLINID^. 

 MYCETOPORUS Mann. 



Our species of Mycetopoms are divisible into two well 

 marked groups which are at least subgeneric. In the first, in- 

 cluding the majority of the species thus far described, the mid- 

 dle and hind tibiae are fringed with coarse unequal spinules, 

 the antennae are relatively short, the pronotum has two sub- 

 lateral discal punctures, one behind the other, and there are 

 no sexual modifications of the abdominal apex. In the second 

 group the four posterior tibiae are densely fringed with short 

 equal spinules, the antennae are longer and heavier, the pro- 

 notum is entirely devoid of discal punctures, and the abdomi- 

 nal apex shows well marked modifications in the male. 



One new Californian species belonging to the first group 

 and two to the second are here described. M. splendidus has 

 been taken at McCloud in Northern California by Dr. Fenyes. 

 The Santa Cruz Mountains species referred to in my South 

 California list as being near splendidus is included with 

 hospitalis described below. 



M. neotomse n. sp. 



Fusiform, piceous, prothorax and sometimes the head and abdomi- 

 nal apex rufous. Antenna? dusky, pale at base and apex, not passing 

 the basal margin of the prothorax, gradually incrassate, the outer joints 

 becoming transverse, the eleventh not quite as long as the two preced- 



