249 
1924] Some Notes on Cercyoii 
and fit in all other respects Ganglbauer’s description of term- 
inatus.\ 
In passing it may be well to say that Horn is in error in 
saying that pygmceus may be distinguished from melanocephalus 
by its pale epipleura. The Epipleura are normally blackish in 
all three of the species here mentioned, which may be readily 
separated as follows. 
Metasternal area extended by an oblique line toward the 
anterior angle. 
Size much larger — 2.2 to 3 mm., palpi blackish 
melanocephalus 
Size much smaller, always less than 2 mm., palpi yellowish 
to brownish, the terminal joint darker pygmceus. 
Metasternum without oblique line extending forward from the 
central area; antennae and palpi pale; length about 2 mm. 
terminatus. 
Although I have seen no native specimens, it is by no 
means unlikely that melanocephalus L. may have been found or 
may yet occur in America. 
Cercyon opacellus new species. 
This is the species described as luguhris Payk. in the Horn 
Synopsis, but the two seem to me quite certainly distinct, nor 
am I able to identify our North American form with any other 
European species. In luguhris Payk. the head and prothorax 
are strongly shining, the surface polished without trace of aluta- 
ceous sculpture, the elytra alutaceous and conspicuously dull. 
In our species the entire upper surface is always finely alutaceous, 
the head and thorax scarcely more shining than the elytra; the 
form is also appreciably more convex. Horn’s description is 
entirely characteristic and need not be repeated. Whether the 
true luguhris Payk. (convexiusculus Steph.) really occurs with us 
I am unable to say. I have as yet seen no American examples. 
■fSince writing the above I have received from Mr. Arrow of the British 
Museum a specimen of terminatus carefully compared by him with Marsham’s 
type, which completely substantiates my conclusions. 
