conjoined, joint 1 cono-cylindrical, half as long as the head, 2 oval, as wide as the 
first, 3—7 less than halt as wide as wide as the preceeding joints, globular, 8 wider, 
not longer, 9 transversely oval, 10 twice as wide as long, 11 oval, twice as wide as 
the second joint and one-half longer with long pubescence. Prothorax as long as 
wide and one-half wider than the head, widest behind the anterior third, where the 
sides are acutely rounded and toward the neck and the base nearly straight ; disk 
moderately convex, near the base with an angulated transverse sulcus, ending on the 
sides in an ample impression, containing a small fovea. Elytra across the shoulders 
as wide as the prothorax, widest behind the middle, where it is one-half wider and 
along the suture one-third longer than the shoulderwidth ; disk rather depressed near 
the base, sutural lines slightly impressed, basal foveze small, the sutural ones near a 
transverse elevation of the base, the discal ones in the anterivr part of a shallow, ob- 
long depression, below the humeral ridge a fovea connected by an oblique line with 
the lateral margin. Abdomen as wide as the elytra, slightly convex without the 
basal impressions, segments subequal, border narrow. The pubescence of the elytra 
and the dorsal segment arranged in regular rows. Anterior coxe contiguous, posterior 
ones distant, trochanters short triangular, legs slender, anterior femora crenate below 
tarsi with one claw, second joint twice as long as the third, metasternum not im- 
pressed. j' anterior tibize arcuate with a deep notch inside of the distal fourth of its 
length, clypeus with a medial ridge. © tibize and clypeus simple. 
Alameda County, California, discovered by Mrs. Marie Fuchs. 
This singular insect unites some of the characters of By/hinus 
(MWacherodes) carinaius and Pselaphus longipalpus, the antennz and the 
palpi belonging to the European Aacheriies group of the Bysthini, the 
form of the head approaching that of Pselaphus. According to the 
testimony of Dr. David Sharp, there is no genus known, with which it 
can be united. 
Euplectus planipennis, n. sp. Piceous brown, abdomen and prothorax paler, 
much depressed, densely pubescent with fine appressed hair. Length, 1.25 mm. 
Head triangular, anteriorly truncate, posterior angles strongly arcuate, eyes very 
prominent, as long as the genz, base entire, across the posterior angles twice as wide 
as the straight frontal margin ; trontal tubercles small, space between them and be- 
hind the frontal margin deeply concave, occipital foveze large and connected with the 
frontal excacation by a very short sulcus, leaving in the middle of the vertex a short 
-acute triangular elevation posteriorly continuous with the occiput. Antennz one-half 
longer than the head, joint t and 2 nearly equal, rounded, longer than wide, 3—8 very 
transverse, equal, narrower than the second, 9 one-third wider, 10 twice as long and 
wide than the ninth, the last joint ovate, truncate at the base, one-third longer than 
wide, slightlp wider than the tenth, pubescence denser at the tip. Palpi short, yel- 
low. Prothorax very broadly convex, nearly plane, punctulate, sides evenly rounded 
with the basal angles broadly arcuate, as long as the width of the head, the prominent 
eyes included, and less than one-fourth wider ; disk nearly flat in the middle, an ob- 
long fovea before the middle and large lateral toveae just behind the middle connected 
by a fine, straight sulcus, running through a very smail median fovea. Elytra one- 
half longer, across the high shoulders slightly wider, across the tip one-fourth wider 
than the prothorax, sides behind the middle nearly parallel ; disk flat, depressed with 
declivous sides and tip, very densely pubescent, discal lines two-thirds long, very 
sharp and fine, the sutural line the same and entire, three basal punctures. Abdomen 
