78 ENTOMOLOGICAL SOCIETY 
with an acute tubercle towards the base of the antenna and faint broken 
transverse ridge across the front between the tubercles; the anterior 
margin with a small shining apical tubercle; the scape of the antenna 
distinctly fringed; the granules of the interspaces of the declivity are 
coarser on the vertex and face. 
9 and 3 Types. No. 7515 U. S. Nat. Mus., Irapuato, Mexico, 
in white mulberry, H. Chambon collector, but received from 
Prof. Herrera. 
Three females and two males of the same lot vary in length 
from 1.65 to 2.1 mm., but otherwise show very little variation 
from the types. 
Three specimens were received through Dr. Erwin F. Smith, 
from Prof. Herrera, who, as stated in his published account, 
received them from Mr. Hipolite Chambon, with the statement 
that it had killed more than one thousand small white mul- 
berry trees in Irapuato, Mexico. This species differs from 
any of those mentioned by Blandford under Pkloeotribus, but 
belongs to his division characterized by the club of the antenna, 
which is not twice as broad as long. This is a character 
.common to the species of the well denned genus Pkl&opkt! torus 
which is represented in the United States by P. frontalis and 
its allies, and in Europe by P. rhododactylus . The Mexican 
species comes closer to our mulberry bark beetle P. frontalis, 
but is distinct from it by its smaller size, brown club of the 
antenna, the prothorax more opaque, smoother, and the 
elytra more shining. 
Phloeosinus tacubaya n. sp. Female type, length 2.4 mm.; body stout, 
piceous, with elytral declivity more reddish; pubescence short, stout, 
intermixed with scales on declivity. Head with front convex, finely 
granulated, granules becoming sparser towards middle; with fine carina 
from middle to anterior margin and finely densely punctured on vertex; 
eyes oblique, deeply emarginate; antennae missing, but in another speci- 
men the club is oblong, with first and second sutures on anterior face 
early straight and the third strongly curved; the sutures are the 
same on the posterior face, but the first joint is very much shorter. Pro- 
thorax much broader than long; sides rounded from base to apex, faintly 
constricted towards anterior margin; surface shining, smooth, rather 
densely punctured, without dorsal line or space. Elytra twice as long 
as prothorax, and slightly broader; basal margin serrate, produced for- 
ward but not elevated; striae narrow, with contiguous elongate punctures; 
interspaces flat, irregularly rugose; declivity convex; first and third 
interspaces serrate; second narrow, convex, punctured. 
Male type, length 2.4 mm.; differs from female in its narrower front, 
with a faint median impression and in the declivity of the elytra, which 
is more shining and less pubescent. 
