158 MEMOIRS ON THE COLEOPTERA 



tusely rounded at apex, the side margins still more narrowly reflexed; 

 tarsi nearly similar, the claws longer but arcuate from near the middle 

 to the apex. Length (cf 9 ) 6.5-8.0 mm.; width 2.6-3.2 mm. 

 Colorado Levette collection. Five examples reductus n. sp. 



9 Body larger, testaceous in color throughout, shining; head well 

 developed, evidently more than half as wide as the prothorax, the 

 antennal joints long and slender; prothorax nearly as long as wide, 

 the sides almost evenly and broadly arcuate throughout, more con- 

 verging anteriorly, the apex three-fourths as wide as the base, 

 rather convex, the sides very finely reflexed, becoming more broadly 

 deplanate basally, the longitudinal impressions near outer and basal 

 fourth distinct; elytra oblong-oval, relatively much shorter than in 

 either of the preceding, only about a fifth wider than the prothorax, 

 obtusely rounded at apex; tarsal claws of only moderate length. 

 Length (9 ) 8.8-9.2 mm.; width 3.3-3.6 mm. New Mexico (locality 

 unrecorded) acomanus n. sp. 



Body much smaller, more slender, shining, piceous-black, the legs, 

 antennae and thoracic side margins testaceous; head rather small, 

 scarcely more than half as wide as the prothorax, the latter smaller, 

 about as long as wide, the sides almost evenly arcuate throughout, 

 the apex a little less narrowed than in the preceding, the surface and 

 sides nearly similar, the impressions vestigial; elytra rather short 

 and oblong-oval, fully a fourth wider than the prothorax, obtusely 

 rounded behind, the striae very fine, the intervals absolutely flat; 

 punctures generally two before the middle on the third, and one 

 near the apex on the second, stria; basal joint of the hind tarsi 

 shorter than usual, distinctly shorter than the next two combined. 

 Length (cf 9 ) 6.5-8.2 mm.; width 2.4-3.0 mm. Labrador (West 

 St. Modest), Sherman. Four examples labradorinus n. sp. 



There may be some doubt as to the status of appalachius, though 

 my four examples are distinctly larger and stouter than any of the 

 females of opaculus at hand, and with correspondingly larger head 

 and prothorax; if the pale coloration of the four examples holds 

 constant through extended series, there will be no doubt of its specific 

 standing. Confusus Lee., from Lake Superior, I do not have at 

 present, though it may possibly be redescribed as one of the last 

 four species of the table; it has been united with the Alaskan 

 ingratus Dej., but I have no means of knowing how justly; it is 

 probably not identical however. The American species of Calathus 

 form a rather unsatisfactory study because of their monotony, and 

 the Atlantic species are less isolated among themselves than those 

 of the Pacific coast ; among these latter forms I find an undescribed 

 species which may be outlined as follows: 



Calathus longulus n. sp. Form elongate-oval, slightly ventricose, 

 alutaceous, blackish-piceous, the elytra deep black and but feebly shin- 



