46 Natural History Bulletin. 



species, third to eighth transverse, ninth and tenth twice as 

 wide as long; eleventh three-fourths longer than wide. Pro- 

 thorax widest in the middle, base two-thirds of the greatest 

 width, sulcus fine, linear. Elytral lines, the second uniting 

 with the sutural line one-third from the posterior elytral Hmits; 

 the third is two-thirds, the fourth one-half of the elytral 

 length. 



Habitat. CaHfornia. (Placer County.) 



O. iNTERRUPTus, Ciisej. AnteuucB as long as the head and 

 prothorax together, third to eighth joints transversa and 

 decreasing in length, ninth and tenth abruptly wider and 

 longer, transverse; eleventh as long as the four preceding 

 ones together. Prothorax widest one-third from the neck. 

 Elytral lines, the middle ones close together, two-thirds of the 

 elytral length, the external one one-third of the length. 

 Length 1.9 mm. 



Habitat. California. (Sonoma County.) 



Rhexius, Lee. 



(From pijyvvm, I break, referring to the geniculate antennae.) 

 Head and prothorax transverse; antenna? geniculate; tarsi 

 with two equal claws. 



R. INSCULPTUS, Lee. Pale brown, body depressed, pubes- 

 cence abundant, erect. Palpi small, last joint thick, ovate. 

 Length 1.2 mm. Plate XL, Fig. 103. 



Head transverse, punctate, twice as wdde as long, sides 

 parallel to the middle, thence strongly convergent; frontal 

 margin one-half of the wndth across the roundly angulated 

 tempora; antennal tubercles very prominent; just behind them 

 is a small oblong fovea, the space between them concave; the 

 base is emarginate, the occiput carinate, the neck slender, one- 

 fourth the width of the head; eyes prominent. Anteiuicp as 

 long as the head and prothorax together, first joint cyUndrical, 

 as long as the frontal margin, and one-third as thick; second as 

 long as thick, not thicker than the first, obconical; third to 



