426 Coleopterological Notices, V. 



0. rtigipenne Csy. is a very aberrant form in its small short ely. 

 tra and large rounded abdomen, but belongs to the genus by all of 

 its structural characters. 0. algarnm Csy. (^^fucicola \\ Csy.) is 

 closely allied to theveneti Fvl., but differs in its much larger size 

 and relatively shorter antennae. Of exsculptum Makl. I took a 

 single specimen in Humboldt Co. California; the sculpture of the 

 pronotum reminds us somewhat of Lathrimaeum, but it is a true 

 Omalium. 



ANTHOBIUM Steph. 



The species of Anthobium are really very numerous in America, 

 especially in the regions near the Pacific Ocean, but had not been 

 collected to any extent at the time Mr. Fauvel wrote upon them 

 (Not. Ent., 7, 1818). During a four or five days collecting trip to 

 Lake Tahoe in June 1886, I took four species in an area notexceed- 

 iing several hundred yards in extent bordering this pretty little 

 ■mountain sea. Omalini of several genera are especially abundant 

 -in those regions, which will yield many more interesting forms 

 -when the numerous secluded valleys can be carefully explored. 



At the present time I have selected a number of the more distinct 

 and interesting new species for description ; these may be identified 

 among themselves as follows : — 



Elytra with tiie outer angle at apex moderately broadly rounded, the apex 

 subtruncate. 

 Head black. 



Entire upper surface intense black nigerrimilin 



Upper surface black, the pronotum and elytra dark piceous ; sutural 

 angles not prolonged in the female ; prothorax in the male much 



larger than in the female....' divei'SiCOlle 



Black, the pronotum slightly paler especially toward base ; elytra pale 



fiavate gilvipeiine 



iHead testaceous. 



Pronotum with a feeble subobsolete median impressed line, at least in the 

 male. 

 Elytra transversely truncate or evenly arcuate at apex, in the female 

 not in the least modified at the sutural angle ; pronotum polished, 



very coarsely, deeply punctate piinctatum 



■Elytra with the sutural angles abruptly and strongly produced in the 

 female ; prothorax in the male much more elongate than in the 



female tibiale 



Pronotum without vestige of an impressed median line. 



Sides of the prothorax broadly subangulate at basal third ; large stout 

 species, strongly punctate SUlianglllatuill 



