1946] Mylabridce 35 
spine-like tooth, preceded by a notch and this in turn by 2 or 3 
minute, semi-concealed spines, and followed by another notch 
bearing 2 blunt denticles; hind tibiae arcuate basally, clavate, 
ending in a spine that is as long as the tooth of the femur; 
pygidium, in the $ , vertical, with most of the apical surface 
smooth and shiny, not strongly pubescent, and bearing a small 
median triangular elevation bordered by a narrowly V-shaped 
groove, in the 9 densely pubescent and without the elevation. 
Another species previously included in Pseudopachymerus is 
erizonensis Schaeffer, but this possesses characters so distinc- 
tive that it requires generic separation. I had drawn up and 
submitted to Mr. Bridwell, for his criticism, a description of 
such a genus, dedicated to him in recognition of the consider- 
able amount of discriminating work that he has done in this 
family, but he preferred to name it himself, which is of course 
his privilege. The description that he published is, however, so 
brief, that it may not be amiss to publish here the description 
that I had prepared, along with a key to related genera, some of 
which are purely Neotropical. 
Neltumius Bridwell, 1946 
Head short, the antennal sockets very close to the base of the 
mandibles, antennae reaching approximately to the base of the 
elytra, gradually thickened from the third segment, with sym- 
metrical segments and therefore not serrate, or with segments 
slightly produced on the outer side so that they are sub-serrate. 
Pronotum short, gibbous, tapered anteriorly, immarginate lat- 
erally and without lateral teeth, the sides (from a dorsal view) 
diverging strongly posteriorly to the acute hind angles, the 
posterior margin with a pronounced median lobe and usually 
weakly indicated lateral undulation; the surface much as in 
Gibbobruchus, with a median longitudinal swelling, most 
sharply differentiated in the type, in which it is crossed medially 
by a strong transverse depression, that in the other species is 
barely indicated, there is also a weak longitudinal furrow, more 
or less accentuated by white scales, the depressions to the sides 
of the median ridge enclose a weak tubercle, more strongly 
developed in Gibbobruchus ; prosternum triangular between the 
coxae which are contiguous; elytra short, exposing the pygi- 
dium; pygidium moderately inclined to nearly vertical, its apex 
rounded, its surface even, without grooves or tubercles, densely 
