1878. ] 541 (Horn. 
arranged in anastomosing lines, the spaces between them smooth, their 
summits with pale brownish pubescence. 
In these respects the two species agree. 
EB. reticulatus is somewhat more elongate, the under surface quite con- 
spicuously granulate and the male with two small frontal tubercles. Length 
18 inch; 4.5 mm. 
Occurs in the Southern States. 
EF. rugosus is more robust and with the under surface obsoletely granu- 
late and the male without frontal tubercles. The upper surface is rather 
more conspicuously pubescent. Length .16 inch; 4 mm. 
Occurs everywhere in the region east of the Rocky Mountains. 
Tribe BOSTRICHINYE. 
The insects of this tribe are all of cylindrical form and of moderate or 
small size. The eyes are prominent and behind them the head is moder- 
ately prolonged. The thorax is prolonged over the head, completely con- 
cealing it from above, covered in front with asperities and often prolonged 
at its anterior margin in two unciform processes; the sides are not mar- 
gined. The antenne are short, terminated by a three-jointed loose club 
(four-jointed in Tetrapriccera), and may have nine, ten or eleven joints, 
ten being the normal number. The anterior coxe are contiguous, their 
cavities confluent. 
The genera are as follows : 
Intermediate joints of antennz shorter than the first and second. 
Tarsi long, slender, first joint very short. 
Amiennes wathvasthree-joOutedselulbye wera niscreer se ae eles Sinoxylon. 
Antenne with a four-jointed club ........... ........Tetrapriocera. 
Intermediate joints of antennze Jonger than the first and second. 
Tarsi as long as the tibi, slender, second joint long. 
KrontmMaRnmTeds atthe sides atleast esc somes tae oe « . -Bostrichus. 
Front not margined ...... Aor egs) eaeet state ekes oy aehv Leah tate palate Amphicerus. 
Tarsi short, second joint not elongated................505- -Dinoderus. 
SEINOAYWLON Dufts. 
The species of this genus are of a cylindrical form. The head is com- 
pletely concealed from above by the thorax, which is truncate in front, the 
apex covered with asperities, while posteriorly the surface is smooth and 
punctured. The elytra are cylindrical, obliquely truncate posteriorly, and 
in many of the species tuberculate or dentate, their sculpture varying with 
the species ; the surface is punctured with but a feeble attempt at a striate 
arrangement. Several of the species have a distinctly impressed sutural 
stria near the declivity. 
Our species divide themselves into two groups which might be considered 
genera. I do not think science would be materially benefited by a new 
name, and I therefore leave them as they have been. These groups are 
based on the number of the small joints of the antenne between the second 
