478 CALIFORNIA ACADEMY OF SCIENCES. 



pressed in the middle. The female does not differ appre- 

 ciably in form. 



The occurrence of a genuine Euplectus near the Pacific 

 coast is a very interesting fact, as heretofore the genus has 

 not been discovered west of the Bocky Mountains. The 

 three specimens indicated were found under the bark of 

 fallen trees, and the species appears to be very rare. It 

 should be placed after conjluens in our lists. 



RHEXIDIUS n. gen. (Euplectini ) 



Tarsi with two unequal claws; antennae straight, basal joint not conspic- 

 uously elongate, widely separated at base. Posterior coxae contiguous. 

 Prothorax without lateral teeth, having a median canaliculation, and two 

 large lateral foveae near the base connected by a fine transverse line. An- 

 tennae eleven-jointed, short; club long and slender, three-jointed. Maxil- 

 lary palpi small, sleuder; third joint oval, slightly longer than wide; fourth 

 much longer than the three basal combined, slender, fusiform. First vis- 

 ible dorsal segment slightly longer than the second; second ventral in the 

 middle as long as the next three together; posterior margins of the posterior 

 segments strongly emargiuate. Elytra with lateral subhumeral fovea and fine 

 carina. 



This genus is founded upon a small Calif ornian species, 

 bearing a great resemblance in many of its characters to 

 Oropus, but differing in the structure of the antennae and in 

 the complete absence of lateral prothoracic teeth. It be- 

 longs in some of its characters near the African genus Raf- 

 frayia, Reitter, but differs greatly in the pronotal sculpture 

 and elytral structure. 



R. granulosus n - sp. — Eather slender and depressed, pale ochreous-tes- 

 taceous throughout, slightly shining; pubescence rather coarse, moderate in 

 length, not very dense. Head much wider than long; eyes far down on the 

 sides, rather small, feebly convex, at about their own length from the base, 

 coarsely granulated; base broadly sinuate; occiput feebly impressed in the 

 middle at base, having dorsally on a line through the middle of the eyes two 

 small, very widely distant, nude foveas, also near the apex a transversely 

 and feebly arcuate groove, terminating in minute foveae which are connect- 

 ed with the occipital foveae by a finer groove; surface impunctate, rather 

 densely covered with small, round, strongly elevated tubercles; antennas 

 distinctly shorter than the head and prothorax together, basal joint but very 



