ClCINDELID/E AND CARABID/E 3 



rather narrow and forming an even arc from the bulbous part to the tip. 

 Length (cf) 13.0 mm.; width 5.0 mm. Oregon (Josephine Co.). Nu- 

 nenmacher. 



This is the species that was erroneously identified by Dr. W. 

 Horn as mimus. It is not only more abbreviated and with relatively 

 smaller head, less convex eyes and very much shorter elytra, but 

 differs conspicuously in the form of the copulatory spicule, which in 

 mimus has the apical part broader, shorter, perfectly rectilinear and 

 parallel-sided from the bulbous part to the tip. It is for this reason 

 that I am forced to regard oregonensis as a species and not as a 

 subspecies of mimus. 



Humeroplanatus is closely allied to borealis but is sufficiently 

 distinct in its more abbreviated, less convex form, more rounded 

 sides of the prothorax, rather shorter antennae and less convex, 

 more gradually declivous and much less sculptured humeral region 

 of the elytra; the general sculpture of the latter also is feebler and 

 sparser, especially toward the suture. This borealis group is more 

 northern in distribution and does not spread far to the southward 

 in California; my series of four examples of humeroplanatus was 

 collected by Nunenmacher in Del Norte Co.; all the others are 

 from Oregon. 



Omus lugubris ssp. sierricola nov. Form nearly as in lugubris but 

 with relatively smaller head and prothorax and evenly oblong-oval, 

 broader elytra, widest at the middle and evidently less coarsely punctate. 

 Length (cf 1 ) 17.0 mm.; width 6.5 mm. California. Levette collection. 



This is the second specimen of the two serving as the original 

 types of lugubris (Ann. N. Y. Acad. Sci., IX, p. 290); it evidently 

 represents a distinct form. The head and prothorax in lugubris 

 are much larger when compared with the hind body, more nearly 

 as in sequoiarum, from which it differs in having the elytra widest 

 well before the middle and thence gradually, arcuately tapering to 

 the apex. In lugubris the acute lateral margins of the pronotum 

 attain the base, while in sierricola they end abruptly a long distance 

 from the base. 



Omus spissipes n. sp. Form somewhat as in parvicollis but larger, 

 stouter and more ventricose, deep black, subalutaceous; head and labrum 

 as in that species, except that the labrum is more rectilinearly truncate, 

 the sublateral sinuations very feeble; mandibles stouter; prothorax similar 

 in form but larger and much more distinctly vermiculato-rugose, the 



