96 MEMOIRS ox THE COLEOPTERA. 



very finely and obsoletely impressed; elytra subparallel, nearly as long as 

 wide, the suture impressed finely at base, very much longer than the pro- 

 thorax; abdomen parallel, long and slender, narrower at base than the elytra, 

 apparently somewhat enlarged at the fifth segment, which is very much 

 longer than the fourth, its surface very finely but closely punctulate though 

 evidently shining. Length 1.4 mm.; width 0.22 mm. California (Lake 

 Tahoe). 



It may be that this species should rather go in Hydrosmecta, but 

 it would be aberrant in any known genus or subgenus. The meta- 

 sternum behind the coxse forms a perfectly straight transverse line. 



Dinaraea Thorns. 



The following species seems as well placed in Dinarcea as anywhere 

 else in the Metaxya series ; the middle coxse are closely contiguous 

 through a large part of their course, and the hind tarsi long and 

 slender, with the two basal joints equal. 



Dinaraea nomensis n. sp. Somewhat stout, parallel, moderately convex, 

 rather dull, the abdomen shining; punctures fine, rather close, asperate on 

 the elytra; color piceous, the head and abdomen blackish, the legs pale; 

 pubescence moderately short and coarse; head short, transverse, the sides 

 strongly arcuate, a little broader basally; eyes small, not at all convex, at 

 much more than twice their own length from the base, oblique, rounded 

 anteriorly, pointed behind; carinae fine, irregular, extending to about the 

 middle; antennae long, dark in color, gradually strongly incrassate, the ninth 

 joint distinctly, the tenth only slightly transverse, the last gradually pointed, 

 as long as the two preceding, the second moderately, the third much more, 

 elongate; prothorax large, moderately transverse, much wider than the head 

 and also rather wider than the elytra, parallel and evenly, distinctly rounded 

 at the sides, the basal angles obtusely rounded; median impression strong 

 from the middle to the base; elytra parallel, transverse, the suture equal 

 in length to the prothorax, the apices not sinuate but rather arcuate ex- 

 ternally; abdomen long, parallel, as wide as the elytra, the first five tergites 

 subequal in length, the first two or three with pallescent apices, the punctures 

 fine but distinct, rather numerous. Length 3.0 mm.; width 0.66 mm. 

 Alaska (Nome). 



A strikingly distinct species, because of its short head and pe- 

 culiar eyes, large, laterally rounded prothorax and many other 

 characters. 



All of the species described to this point have the hypomera fully 

 visible and nearly flat when viewed from the sides. In the following 

 forms, through Synaptina, the hypomera are horizontal or virtually 

 so and warped, so that from a lateral viewpoint they are in small 

 part visible, because of the warping. 



