290 Coleopterological Notices, VII. 



delidse as Brennus is among the Carabidse, and the species of the 

 two genera are about equally differentiated. The Pacific coast 

 affords other instances of endemic genera which include numerous 

 feebly differentiated species, such as Coniontis, and it is possible 

 that all three of the types mentioned may be moderately ancient 

 migrants from the Asiatic continent, which have become multi- 

 diffei'entiated at present, because of the numerous isolated local 

 environments of those broken coast regions, but feebly so, as a 

 rule, because of the geologically recent character of the lands 

 west of the Sierras. 



The new forms mentioned in the table are briefly described 

 below. 



O. moiitanus. — Somewhat narrow, elongate and subparallel, deep black 

 and shining, Head feebly rugose, the median parts of the frOnt nearly 

 smooth ; frontal impressions moderate ; labrum deeply bisinuate, the six setig- 

 eroiis punctures large and deep, the median lobe advanced and truncate ; an- 

 tennae % ^s long as the body, moderately stout toward base, the third and 

 fourth joints feebly constricted near the middle. Proihorax between 34 

 and % wider than long, rounded laterally at the apex, the sides rapidly con- 

 vergent and very feebly arcuate thence to the base, the latter very indistinctly 

 margined and % as wide as the apex ; surface broadly and feebly convex, 

 finely and feebly vermiculato-rugose, the side margins reflexed, more deeply 

 at basal fifth or sixth ; median line very fine. Elytra rather feebly convex, 

 elongate, evenly oblong-oval, widest at the middle, scarcely more than 7^ wider 

 than the prothorax and 2% times as long ; sides parallel and feebly arcuate j 

 punctures moderately fine, rather sparse toward the middle but denser nearthe 

 sides, feeble and scarcely closer toward apex ; foveolse indistinct. Length $ 

 15.5-17.5, 9 16.5-18.0 mm. ; width $ 5.5-6.0, 9 6.0-6.7 mm. 



California (Placer Co.). 



Allied to edwardsi, but narrower and more elongate, with less 

 convex male elytra, and with a distinctly different structure of 

 the labrum as indicated in the table. The description is taken • 

 from the male, the female being a little more ventricose and with 

 more convex elytra. 



O. luguliris.— Moderately stout, deep black and somewhat dull through- 

 out. Head much narrower than the prothorax, unevenly and not strongly 

 rugose, the median parts of the front finely and sparsely punctate ; labrum 

 deeply sexpunctate, bisinuate, the advanced median lobe truncate ; antennae 

 fully % as long as the body, relatively slender, gradually attenuated as 

 usual, the third and fourth joints very feebly constricted at the middle. 

 Prothorax relatively rather large, obtrapezoidal, the sides moderately con- 

 vergent and almost straight from near the extreme apex to basal fifth, thence 



