NORTH AMKRICAN C0LE0PTJ:RA. 
39 
propleural triangle is in absolute union with the prosternuin, or very 
nearly so. In facies they more nearly resemble Thambus than 
Dromseolus. 
I have already called attention to the fact that in Microrhagus 
(Trans. Am. Ent. 8oc. 1886, p. 35) the pubescent fovea on the last 
or penultimate segment was a sexual character. While the fact is 
correct, I have wrongly attributed the possession of it to the male. 
Since then the same character has been elsewhere observed, Enio- 
mophthalrnus americanus, where the female has the fovea and the 
male a small tubercle. 
In the table of Microrhagus (Mon. des Eucnemides) under “23,” 
p. 528, two series of species are separated, the one with femora 
scarcely darkened, the other with them decidedly brown or nearly 
black. Fortunately but three species are sepai’ated under the last 
<livision, otherwise confusion might result, as the color of the legs, as 
above defined, has no value whatever. 
CLiADUS Bonv. 
While this genus of Eucnemidm is not represented in our fauna, 
belonging exclusively to the central American region, I have thought 
it worth while to call attention to it, as but few interested in purely 
North American entomology will see the illustration of the extra- 
ordinary modification of the mouth parts published by me in the 
“ Biologia Centrali-Arnericana.” 
The accompanying illustration is the same as used in that publi- 
cation, and shows the maxilla of the 
right side uncovered by the removal 
of the half of the mentum and on the 
right side of the cut the remaining half 
of the mentum. The maxillary paljms 
is transformed into two long stalks 
bearing ciliate branches. The labial 
palpus is ])rimarily divided into four 
branches, two of which, the first and 
third, are again divided ; all with ciliate 
branches. The ribbon-like prolonga- 
tion behind the palpar modification is 
a modified ligula. The two lobes of the 
maxilla are sufficiently well shown in the cut and need no explana- 
tion. 
