= 
Horn.] 544 [April 19, 
S. bidentatum, n. sp. 
Piceous, thorax and elytra at base rufous. Head punctured, front with 
a semicircle of yellowish hairs. Antenne pale, 9-jointed. Thorax slightly 
broader than long, asperato-granulate in front, smooth and very sparsely 
punctulate behind. Elytra gradually more coarsely punctured from base 
to tip, sutural stria near the declivity finely impressed, on the declivity very 
deeply impressed and arcuate, and surrounding a sub-sutural acute tubercle 
on each side near the middle of the declivity ; a slight tuberosity is also 
formed by the interruption of the margin of the declivity near the tip. 
Legs piceous, anterior femora testaceous. Length .16 inch ; 4 mm. 
This species in appearance is not very different from quadrispinosum, but 
the bispinous and coarsely punctured declivity and 9-jointed antenne will 
readily distinguish it. 
One specimen from Nebraska. 
S. declive Lec. Pacif. R. R. Rep. 47 par. App. 1, p. 48. 
A large species of the form and size of basillare with the elytra usually 
uniformly piceous. The head has the semicircular line of yellow hairs. 
The thorax roughened in front and sparsely punctured posteriorly. The 
elytra are more coarsely punctured posteriorly than in front, and there is a 
sutural stria posteriorly rather deeply impressed but not entering the de- 
clivity ; the suture is slightly elevated at the beginning of the declivity, 
forming an acute tooth ; the declivity has a broad smooth space on each 
side of the suture. The legs and antenne are pale testaceous, the tibice 
darker. Length .24 inch ; 6 mm. 
Occurs in California and Oregon. 
S. suturale, n. sp. 
Form and color of bidentatum. Head punctured and with a semicircle 
of pale hairs. Thorax slightly broader than long, apex asperato-granulate, 
posteriorly nearly smooth, sparsely and finely punctured. Elytra rather 
finely punctured at base, gradually more coarsely toward the tip, declivity 
coarsely punctured in front, smooth on each side of the suture near the tip, 
the suture at the middle of declivity slightly triangularly elevated. Legs 
and antenne pale, tibiz darker. Length ,16 inch; 4 mm. 
This species has also 9-jointed antenn. 
One specimen ; Sauzalito, California ; James Behrens. 
TETRAPRIOCERA, ». g. 
Form of Sinorylon. Head covered by the prothorax. Clypeus and oral 
organs of Sinovylon. Antenne eleven-jointed, terminated by a four-leaved 
club ; first joint stout, second oval, half the 
i length of the first, joints 3-7 short, indistinct, 
gradually broader, the seventh more than a 
half broader than the third, the whole taken 
together not longer than the first joint and 
but little longer than half the eighth, the 
latter elongate-triangular with the anterior free angle rounded, the last 
