282 H. C. FALL. 



4. I*, lo bat us Csy. — The following is Casey's description : ''Female. Body 

 rather stout, cylindrical, dark piceo-castaneous in color throughout, the legs 

 scarcely, the antennae much, paler; lustre rather dull, the pubescence very short 

 and dense on the elytra. Head convex, minutely and densely granulate, the 

 transverse frontal impression distinct. Prothorax distinctly wider than long, 

 widest at about the middle, narrowed slightly to the base, rapidly and just visi- 

 bly sinuate to the apical lobe; surface minutely and densely granulose toward 

 base, more coarsely, sparsely and irregularly so toward apex, the median line 

 finely impressed. Elytra three-fourths longer than wide, equal in width to the 

 prothorax, minutely and densely subgranulose in texture, with the punctures 

 rather strong, sparse and distinct, feebler toward tip, where they are more dis- 

 tinctly intermingled with small granules, and the ground lustre is more shining. 

 Length 4 mm. ; width 1.5 mm. Nebraska." 



I have referred to this species a series of specimens from Missouri 

 to New Mexico, females of which agree well enough with the above 

 description, except that the pubescence cannot fairly be called 

 "dense." As compare'd with females of rufieornis the surface sculp- 

 ture is more rugose, the lustre duller, the elytra! punctuation closer 

 and coarser, the feeble elevated lines more obvious. The median 

 lobe of the anterior thoracic margin is as stated by Casey more com- 

 pletely serrulate ; the side margin of the prothorax is very feeble, 

 not at all flattened, finely irregularly granulato serrate; the subapi- 

 cal ventral carina nearly obsolete. The male does not differ mate- 

 rially from the female in color, but is more opaque as usual; legs 

 rufocastaneous, antenna? paler; the antennal rami much shorter 

 than in rufieornis, that of the third joint not longer than the joint 

 itself, that of the fourth joint scarcely three times as long as the 

 joint. The prothorax is scarcely visibly narrower than the elytra, 

 the anterior lobe serrulate throughout, but more finely and remotely 

 so laterally ; side margin as in the female. Elytra slightly less than 

 twice as long as wide; last ventral without subapical carina. 



The series at hand varies from 3-5 mm. in length, and bears the 

 following locality labels: Missouri (Horn collection, where it bears 

 label P. thoracicus Rand.). Salina, Kansas (Knaus) ; Nebraska 

 (Nat. Mus. collection); Superior, Nebraska (Knaus); Happy Hol- 

 low and Ouray, Colorado (Wickham) ; Las Vegas, New Mexico — 

 9600 feet (Cockered). 



5. P. pruinosus Csy. — Male. Black, opaque, antenna? pale rufous, femora 

 and tibise piceous, tarsi pale. Differs from rufieornis as follows: Vertex obtusely 

 carinate ; antennal rami shorter, that of the third joint one-half longer than the 

 joint itself; prothorax evidently a little narrower than the elytra, seven-tenths 

 as wide as the latter behind the middle, side margin plainly serrulate through- 



