Casey — A Revision of the American Paederini. 21 
It would be a source of the greatest satisfaction if typical 
examples of all the American genera described by Dr. Sharp 
could have been procured, not only for the purpose of ar- 
ranging them in proper succession with the others, but 
especially in order to avoid the possible redescription of some 
of them from our southwestern regions under new and un- 
necessary names, but this was found to be impracticable and 
recourse was had to inferences derived from the rather too 
short diagnoses and poor figures of the ‘‘ Biologia.’’* It is 
probable however that but few synonyms will be found 
among the genera. It seems scarcely necessary to repeat, in 
view of what I have already published (Annals N. Y. Acad. 
VII, p. 353), that Liparocephalus and related genera are in 
no way Paederids but belong to the Aleocharini. 
CRYPTOBIA. 
The components of this extensive subtribe are the most 
highly organized and actively predaceous of the Paederini 
and include some of the largest species of the tribe. They 
are very poorly represented in the western parts of the old 
world, extremely abundant and greatly diversified in North 
and South America and are moderately numerous in eastern 
Asia, to which regions they probably migrated from North 
America in rather remote geologic time, for at present the 
Asiatic genera are all different from those of North America. 
Their close relationship with the Lathrobia is shown not only 
by general organization and prosternal structure, but especially 
by the occurrence of a pleural fold on the elytra, the origin 
and meaning of which are rather obscure. The absence or 
* My failure to secure the rich and varied collection of Staphylinidae 
brought home from Brazil by Mr. H. H. Smith, was one of the greatest 
disappointments of my scientific career, for this copious material contains 
examples of nearly all the tropical American genera, besides a large pro- 
portion of the remarkably diversified species of those regions, as I inferred 
from mounting nearly a thousand specimens forming a sampie lot placed 
in my hands by Mr. Smith for examination. These specimens are prob- 
ably at present in the Carnegie Museum at Pittsburg with the Smith 
collection. 
