220 Memoirs on the Coleoptera 



scarcely two-fifths wider than the prothorax, the sides gradually rounding 

 behind the middle; striae very fine; intervals flat; subscutellar puncture 

 distinct; dorsal punctures very fine, three in number. Length (9) 

 10. 5-1 1. o mm.; width 3.75-4.0 mm. Arizona (Palmerlee), — H. A. 

 Kaeber. Two specimens. 



This species stands rather alone and is not closely allied to any 

 other in my collection; it is much larger and less convex than 

 either opaculus Lee, or ohesuliis Csy., and has the anterior parts 

 less shining and the elytral striae still finer and less deep. It is 

 also very much larger than sonoricus Csy., with the latero-basal 

 parts of the pronotum widely and concavely explanate in a manner 

 not even suggested in sonoricus. 



Calathus calator n. sp. — Narrow, elongate-suboval, rather convex, 

 highly polished throughout, blackish-piceous, the anterior parts dark 

 rufous; under surface pale piceous, the legs pale brownish-flavate; head 

 half as wide as the prothorax, the eyes but feebly convex; antennae 

 slender, pale testaceous, more than half as long as the body; prothorax 

 very nearly as long as wide, widest at about the middle, the sides very 

 evenly arcuate throughout and finely reflexed, a little more so basally; 

 surface not deplanate at the sides basally, the foveae shallow, elongate 

 and discal; impressions barely traceable, the stria very fine and feeble; 

 apex deeply sinuate, only three-fourths as wide as the base; elytra 

 elongate, subparallel, two-thirds longer than wide, barely perceptibly 

 wider than the prothorax, the apex very gradually and evenly rounded; 

 striae fine but sharp, smooth; intervals feebly convex, the third with three 

 punctures, the two anterior in the third, the third in the second, stria; 

 tarsi long and slender; tarsi and tibiae darker than the femora. Length 

 (9) 7.7 mm.; width 2.9 mm. Colorado (Peaceful Valley), — Cockerell. 



This species can be compared only with coloradensis, but it is 

 still narrower, with relatively narrower head and paler anterior 

 parts and with the pronotal surface not deplanate toward the hind 

 angles. 



Calathus aquilus n. sp. — Form more abbreviated and smaller in size, 

 polished and blackish-piceous throughout, the sides of the prothorax 

 diaphanously somewhat paler; under surface blackish-piceous, paler 

 anteriorly, the legs pale rufous throughout; head moderate, with slightly 

 prominent eyes, evidently more than half as wide as the prothorax; 

 antennae pale, three-fifths as long as the body; prothorax shorter, more 

 than a fourth wider than long, widest submedially, the sides very mod- 

 erately reflexed, barely more so gradually toward base, arcuate, rather 

 straighter behind the middle; surface feebly, subevenly convex, with 

 fine transverse rugulae, not deplanate postero-laterally; foveae large, 

 irregular, very shallow and scarcely definable, distant from the sides as 

 usual; elytra shorter, barely one-half longer than wide, fully two-fifths 



