—195— 



conjoined, joint I cono-cylindiical, 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 lunger with long pubescence. Protliorax 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 tratisverse sulcus, ending on the 

 sides in an ample impression, containing a small fovea. Elytra across the shoulders 

 as wide as the prothorax, wide^t behind the middle, where it is one-half wider and 

 along the suture one-third longer than the sbouldervvidth ; disk rather depressed near 

 the base, sutural lines slightly impressed, basal fovea* small, the sutural ones near a 

 transverse elevation of the base, the discal ones in the anterior 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, sliglitly convex without the 

 basal impressions, segments subequal, border narrow. The pubescence of the elytra 

 and the dorsal segment arranged in regular rows. Aiiterioi- coxre 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. (^ anterior tibiae arcuate with a deep notch insiile of the distal tourlh o( its 

 length, clypeus with a medial ridge. 9 tibite and clypeus simple. 



Alameda County, California, discovered by Mrs. Marie Fuchs, 

 This singular insect unites soiTie of the characters of Byihinus 

 {Machcerodes) carinaius and Pselaphus longipalpus, the antennae and the 

 palpi belonging to the European Machcerites group of the Ihihini, 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, alxlomen and prothorax paler, 

 much depressed, densely pubescent with fine apprcssed hair. Length, 1.25 mm. 



Head triangular, anteriorly truncate, posterior angles strongly arcuate, eyes very 

 prominent, as long as the genoe, base entire, across the posterior angles twice as wide 

 as the straight frontal margin ; frontal tubercles small, space between them and be- 

 hind the frontal margin deeply concave, occipital foveae 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. Antennse one-half 

 longer than the head, joint i 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 foveas just behmd the middle connected 

 by a fine, straight sulcus, running through a very small 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 



