234 Trans. Acad. Sci. of St. Louis. 
though they are probably less vestigial than in Stilicopsis. 
Like the latter genus Stamnoderus occurs also in Central 
America. Monstrosus was originally assigned to Sunius. 
Sunt. 
This group or subtribe consists for the most part of the 
single genus Sunius, one of the most widely distributed and 
characteristic Paederid genera of the palaearctic and nearctic 
regions of the world. There are a few other genera, especially 
some peculiar to the neotropical regions, but none other ap- 
pears to enter the fauna of America. In some features, 
such as the structure of the tarsi, antennae and the general 
habitus of certain forms, it apparently makes a closer ap- 
proach to the Pinophilini than any other type of the Paede- 
rini, but it can be stated quite positively that any such re- 
semblances are merely superficial and fortuitous, for in the 
structure of the prosternum, palpi, form of the head above 
and beneath and many other characters these two types of 
Staphylinidae are so widely separated as to indicate little or 
no phylogenetic relationship. The three genera which happen 
to be represented by material in my cabinet may be described 
as follows: — 
Labrum quadridentate, advanced and arcuate toward the middle, the teeth 
broad and very strong, the median very much longer and more advanced 
than the outer and each bearing a short stiff tactile seta laterally 
near its acute apex, the outer teeth acute and nude; prosternum 
transversely and broadly tumid, finely, longitudinally and rather feebly 
carinate, the carina not crossing the transverse concavity just behind 
the apical margin; hind tarsi almost as long as the tibiae, slender, the 
basal joint about half as long as the remainder taken together; head as 
in Sunius; eyes smooth, the facets not convex; sculpture throughout 
very coarsely but not densely, simply punctate. Europe......*Nazeris 
Labrum bidentate; eyes not smooth, each of the individual facets convex.. 2 
2— Labrum very short, broadly truncate, having a small median emargina- 
tion, at each side of which there is a short tooth in the form of a slender 
truncated cone, a very small stiff tactile seta projecting axially from its 
extremity, the edge just without each tooth broadly and arcuately lobed; 
prosternum thrown up in an acute transverse ridge at some distance 
from the apical margin and separated therefrom by a narrow deep con- 
cavity, the median line with a fine but acutely elevated, somewhat un- 
even carina, which crosses the anterior concavity and attains the apical 
