72 ENTOMOLOGICAL SOCIETY 
co ivex, with two broad, opaque, slightly impressed longitudinal spaces 
each side of a slightly elevated, smooth, shining median one, the remain- 
ing surface towards the eyes shining, sparsely punctured and with a 
few long, backward-curved hairs. Prothorax subopaque, as long as 
the basal width, narrower in front and deeply excavated in the sides for 
the anterior legs; distinctly punctured, denser each side of a faint, median, 
dorsal, smooth space and coarser near the anterior and posterior margins; 
posterior third with distinct impressed dorsal line; base bisinuate. Elytra, 
subopaque; base elevated and with a subacute margin; striae faintly 
impressed, narrow, shining, and with faint, shallow punctures; the 
interspaces subconvex, equally elevated towards the middle, not punctured 
except those on the sides, which have a row of very fine obscure ones; 
the declivity is darker, opaque, with shallow, shining punctures faintly 
evident; the third interspace is strongly elevated, carinate, with an acute 
apex and extending to the middle of the face of the declivity; five and 
seven are slightly elevated and acute but not extending much beyond 
the vertex; the apical process is divided into two distinct triangular 
teeth, outer one longer; the apex is deeply, obtusely emaYginate; the 
first interspace is not distinctly tuberculate on the vertex. 
C? Type. No. 7509 U. S. Nat. Mus., Chaleo, Mexico, 
October, 1903, in pine. Received from A. L Herrera, under 
his number 873. 
This is closely allied to a common (but undescribed) species 
which infests the pines in Arizona. 
Gnathotrichus nitidijrons n. sp. Female type, length 2.8 mm.; elon- 
gate, cylindrical, brownish; head and ventral portion black; the legs 
reddish. Head broad, slightly convex, shining, and punctured each 
side of a broad smooth median space, which extends from the anterior 
margin to near the vertex; pubescence fine and sparse; eyes large, emar- 
ginate; antenna club with two nearly straight indistinct sutures on the 
anterior face and with a few scattering long hairs. Prothorax more than 
half as long as elytra; posterior two-thirds with sides parallel; anterior 
third with sides and anterior margin broadly rounded, the latter faintly 
roughened with broad serrations; anterior half sparsely pubescent, 
finely asperate, the asperities coarser towards anterior margin and much 
finer and denser towards the vertex and sides; posterior half glabrous, 
opaque, finely indistinctly punctured. Elytra glabrous, except on de- 
clivity, which bears a few long hairs; striae not impressed, indistinct, 
faintly punctured; interspaces flat, faintly rugose; declivity with inter- 
spaces one and two slightly impressed and with slight elevation armed 
with a row of minute granules each side towards the vertex, while towards 
apex interspace one is slightly elevated and the others flattened and 
faintly rugose; the sides are not strongly rounded but narrowed towards 
the apex, giving it a slightly produced appearance. 
