204 i Trans. Acad. Sci. of St. Louis. 
that representatives of so widely distributed a genus should 
be wanting in the true Pacific coast faunal region of the 
United States, if we except the extreme southern part of 
California, and this is rather conclusive evidence that the 
genus migrated from America to Europe, or the reverse, by 
way of Greenland, rather than by the usual Alaskan route and 
probably indicates a European rather than American origin. 
The species inhabiting our territory, known to me thus far, 
may be distinguished by the following outline descriptions :— 
Elytra subequal to or longer than the prothorax......ccccecevcccceseeseed 
Elytra more or less distinctly shorter than the prothorax.......ceessseee18 
2— Male with a subparallel-sided, narrow notch at the apex of the sixth 
ventral segment, the bottom of the notch broadly and transversely 
POMWOEE Sos bcs soc boku ewes Gabe k an epede dio kaan une ecee cu ceen eae 
Male with a broad emargination occupying virtually the entire apex of the 
sixth segment, the notch having the form of an incised cusp, the widely 
diverging sides of the emargination being broadly arcuate .....-..+- 4 
3— Form parallel, the lustre feebly shining, pale brownish-testaceous 
throughout, except the elytra, which are dusky and the abdomen 
blackish-piceous; head moderate, convex, slightly longer than wide, 
the sides parallel and straight behind the well developed convex eyes; 
base broadly sinuato-truncate, the angles rather narrowly rounded; 
occiput not impressed, the punctures minute but deep, dense; prothorax 
distinctly though not very greatly narrower than the head, about a fifth 
longer than wide, the anterior angles obtuse but very evident and at 
apical fourth, the sides thence very feebly converging and almost 
straight to the moderately rounded basal angles; surface more shining 
than the head, the very minute punctures feebler and less close-set, 
feebly bi-impressed at the basal margin; elytra nearly a fifth longer than 
wide, parallel, two-fifths wider and about a third longer than the pro- 
thorax, very minutely, closely, subasperately punctate; gular sutures 
well separated. Male with a small subparallel-sided notch somewhat 
deeper than wide at the apex of the sixth ventral, the bottom of the 
notch broadly rounded with the edge beveled or concave. Length 
2.6 mm.; width 0.45mm. Texas (El Paso) and New Mexico, — Mr. 
Wickham. oscicnctocenee cescecwegosccseccerevesentassssMOSAnhe CY, 
Form less parallel, the elytra relatively much wider, similar in coloration, 
the lustre alutaceous,‘the minute sculpture rather denser; head well 
developed, but little longer than wide, larger than in ¢exanus but other- 
wise nearly similar; prothorax relatively smaller and narrower, much 
narrower than the head, fully a fifth longer than wide, similar to that 
of texanus, except that the basal angles are more broadly rounded and 
the two basal impressions more approximate; elytra subquadrate, 
parallel, only just visibly longer than wide, one-half wider than the 
prothorax but only about a fourth longer; gular sutures more approxi- 
mate, the punctures of the under surface of the head denser and more 
