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Feb.,1918 Bulletin of the Brooklyn Entomological Society 5 
Type, a unique male in my collection, collected many years ago and prob- 
ably in the middle Sierras of California. 
This species differs from the preceding primarily as regards the 
color, the frontal characters, the antennal joints, the shape of the 
thorax, and the legs. 
Matheteus theveneti Lec.—This very rare and beautiful species, first col- 
lected at Mariposa, Cal., has in recent years been taken in Humboldt Co., 
Cal., by Professor E. O. Essig and others. 
Phausis (Lamprohiza).—In comparing my series of P. splendidula Linn. 
with P. reticulata Say., both collected in the mountains of North Carolina, 
I find that they can be best separated by size, the former averaging 8 mm. 
in length as against 6 mm. for the latter. The thoracic characters as given 
by LeConte in his synopsis are not reliable, for the thorax in reticulata 
is more often “wider than long” than it is “not wider than long.” 
In my series of P. riversi Lec., assembled from various places in north- 
ern California and the Sierras, I find that there is a great amount of varia- 
tion as regards the color of the prothorax. In most, this is typical, yellow 
with a piceous discal spot, but thege are others with it entirely yellow and 
even the scutellum yellow, while one, from Inverness, Marin Co., is en- 
tirely black with the exception of the extreme margin, which is yellow. A 
few specimens also have the sixth ventral segment luminiferous, not 
merely yellow. The generic name Phausis of LeConte should supplant 
Lamprohiza of Motschulsky, according to the more recent European 
authorities. 
Mastinocerus californicus n. sp.—Slender, flattened, subopaque, piceous, 
the legs, mouthparts, and last two abdominal segments luteo-piceous. Head 
indistinctly scabro-punctate, broader than long, antenne longer than head 
is broad, first joint as long as second and third together, which are simple, 
‘joints 4-10 slightly increasing in length, each with two long cylindrical 
apical processes, about three times as long as the joints themselves, eleventh 
slightly longer than tenth and provided with a single process which arises 
from its apex. Prothorax a little wider than long, as wide as head and 
slightly narrower than elytra, median half of base broadly lobed, posterior 
angles rectangular and blunt, sides straight and parallel for posterior two 
thirds, then rounded to apex, apex slightly arcuate, disc flat. Elytra less 
than one half as long as the abdomen. Length 7 mm., breadth 1.25 mm. 
Type, a unique in my collection, collected at Sobre Vista, Sonoma Cos 
Cal., May 30, 1910, by Mr. J. Aug. Kusche, and kindly presented by him. 
A second, from Kaweah, Cal., is in the collection of Mr. Ralph Hopping. 
This very interesting species differs from both M. texanus Lec. 
and M. opacus Horn in the fact that the head and prothorax are 
both more transverse, that the base of the thorax is more dis- 
