AMERICAN COLEOPTKRA. 289 



peata, as is made sure by a careful comparison with the types in the 

 Horn and LeConte collections, made at my suggestion by Mr. Lie 

 beck and Mr. Blanchard respectively. Oddly enough, the whole 

 catch made by Mr. Ricksecker are males, and not females as sup- 

 posed by Horn. The short antennal club, and the stout posterior 

 thighs certainly are of the female type, but the form of the abdo 

 men is that common to all males, and, moreover, the date of appear- 

 ance would indicate the latter sex. To settle the matter definitely, 

 several specimens were dissected, with the result as above stated. 

 Clypeata is surely the most aberrant species of the genus in our 

 fauna, differing from all others in color, in the short antennal club 

 of the male, in the strongly advanced clypeus, and in the dilation 

 of the latter at the sides. 



17. D. Iruncata Lee 



A small species, easily recognized by the sharply angulate cly- 

 peus, which is usually a little emarginate anteriorly, instead of being 

 rounded as is Usual. The punctuation of the thorax is very fine and 

 dense, the terminal joint of maxillary palpi widest behind the mid- 

 dle and narrowly truncate at tip. The elytra are normally piceous, 

 with a more or less distinct bronze or green surface lustre, but are 

 sometimes entirely testaceous. In distribution truncata ranges from 

 the plains adjoining the Rocky Mountains on the east (Nebraska, 

 Colorada and Montana), through Utah and Nevada to the Pacific 

 Coast (Oregon to Southern California). It is not rare in Southern 

 California, occurring (m both sides of the Sierras from the valleys 

 up to 6000 feet elevation. At the higher altitudes it is most fre- 

 quently taken on pines. 



18. D. picea Horn. 



I have seen but two specimens, one of these being the type. In 

 these the clypeus differs somewhat in form, but in both it is more 

 strongly arcuate at middle than usual, and is also more sparingly 

 punctate than in any of our other species. The 8-jointed antenuse, 

 and the uniformly rounded (not angulate) sides of the thorax are 

 its most notable peculiarities. The terminal joint of the maxillary 

 palpi is slender and nari'owed towai'd the apex. It is probably con- 

 fined to the more elevated portions of the Cape region of Lower 

 California. 



TBANS. AM. ENT. SOC, XXVII. (37) AUG., 1901. 



