94 MEMOIRS ON THE COLEOPTERA. 



teriorly, with the apex truncate medially, the angles very broadly 

 rounded. 



Omegalia n. gen. 



The minute species of this genus are intensely black throughout 

 and have the abdomen very finely and densely punctulate as in 

 Paradilacra, but with a very different structure of the sterna, the 

 middle coxae being contiguous, the mesosternum short and broadly 

 triangular and the metasternum transverse, not at all projecting 

 anteriorly. The tarsi are of peculiar structure as shown below. 

 So far as known these obscure allies of Metaxya are confined to the 

 high Sierras. 



Omegalia abjecta n. sp. Slender, moderately convex, not parallel, deep 

 black throughout, the legs and antennae also black or but feebly picescent, 

 rather dull in lustre, the punctulation very minute and dense and but little 

 less dense on the abdomen, which is also strongly alutaceous; head nearly as 

 long as wide, somewhat swollen basally, the eyes at much more than their 

 own length from the base, the carinae wanting except at the extreme base; 

 antennae rather short and stout, moderately incrassate, the outer joints 

 strongly transverse, mutually similar in form, the last oval, obtuse, longer 

 than the two preceding, the second moderately elongate, subcylindric, the 

 third shorter, strongly obconic; pro thorax convex, only slightly transverse, 

 much wider than the head and narrower than the elytra, the parallel sides 

 subevenly and moderately arcuate, more rounding anteriorly to the apex, 

 which is not quite so wide as the more rounded base, unimpressed; elytra 

 slightly shorter than wide, much longer than the prothorax, the apices not 

 sinuate laterally; abdomen much narrower than the elytra, parallel, the 

 thick border becoming gradually thinner posteriorly, the fifth tergite much 

 longer than the fourth, the sixth broad, obtuse; hind tarsi slender, the first 

 three joints decreasing rapidly in length, the first long and slender, much 

 longer than the second and the latter correspondingly longer than the third. 

 Length 1.72 mm.; width 0.32 mm. California (Truckee and Lake Tahoe). 



Distinguishable by its small size, fine and dense sculpture and 

 completely black coloration. 



Omegalia vieta n. sp. Similar to abjecta in its deep black coloration, more 

 slender and rather more shining, the micro-reticulation feebler, the abdomen 

 similarly densely punctulate and the vestiture short, dark cinereous and 

 inconspicuous; head about as long as wide, not swollen basally but perfectly 

 parallel, the tempora very much longer than the convex eyes Taut similar 

 in prominence, nearly straight, rounding at base, the basal margin not turned 

 forward beneath to form the carinae; antennae similar, feebly incrassate, 

 the outer joints rather less transverse; prothorax smaller, scarcely visibly 

 wider than long, parallel, with broadly rounded sides, only slightly though 

 evidently wider than the head, much narrower than the elytra, the latter very 



