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 Rocky 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 conjiuens 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 coxse coutiguous. 

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

 large lateral foveas near the base counected by a fine transverse line. An- 

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

 lary^ palpi small, slender; third joint oval, slightly longer tbau wide; fourth 

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

 ible dorsal segment slightl}"^ longer than the second; second veutral 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 Californian species, 

 bearing a great resemblance in many of its characters to 

 Oropus, but differing in the structure of the antennse 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 ^- sp. — Rather slender and depressed, pale ochreous-tes- 

 taceous throughout, slightly '•hining; 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 feebl^Mui pressed in the 

 middle at base, having dorsally ou a line through the middle of the ej'^es 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; antennae 

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



