126 NORTH AMERICAN 



the pronotura ; interspaces equal to them in width, polished. Abdominal 

 segments decreasing regularly and very gradually in width, first as wide as 

 the contiguous elytra; border prominent; surface convex, polished, finely 

 punctulate ; transverse carinae not cusped. Legs dark brownish-black, 

 moderate in length ; first joint of the posterior tarsi one-half as long again as 

 the second. Under surface of the abdomen shining, very finely granulate, 

 finely and somewhat distantly punctulate. 



Male. — Unknown. 



Female. — Sixth ventral segment evenly rounded behind. 



Length 2.9 nun. 



Detroit, Michigan, 2. 



104. S. enodis n. sp. — Form moderately slender. Pubescence rather 

 long, recumbent, cinereous, quite close and evenly distributed. Head mode- 

 rate, twice as wide as long; interocular surface nearly Hat, rather closely 

 and finely punctate, two and one-half times as wide as the eye; longitudinal 

 elevation obsolete ; ocular lines meeting at two lengths in advance ; antennae 

 piceous-black, equal in length to the width of head, slender, club distinct; 

 third joint equal in length to the fourth, last two joints equal in size, ninth 

 much smaller; first joint of maxillary palpi testaceous, second and third black. 

 Prothorax widest at the middle, where it is four-fifths as wide as the head ; 

 sides thence convergent posteriorly and sinuate ; very slightly longer than 

 wide ; anterior and posterior margins equal : surface evenly convex and finely 

 punctate ; interspaces generally narrower than the punctures, shining. 

 Elytra at base nearly as wide as the head ; sides feebly divergent posteriorly 

 and slightly arcuate ; together broadly and feebly emarginate behind, more 

 strongly so at the base ; suture one-eighth as long again as the pronotum ; sur- 

 face evenly convex, with the exception of a scarcely perceptible depression 

 along the suture ; rather finely punctate ; punctures shallow ; interspaces 

 narrower anteriorly, and broader posteriorly than the width of the punctures, 

 shining. First four abdominal segments of equal width, and as wide as the 

 elytra; border very broad ; surface shining, finely and rather closely punc- 

 tulate ; transverse carinae not cusped. Legs dark blackish-piceous, rather 

 slender, tarsi moderately robust ; first joint of posterior three-fourths as long 

 again as the second, second scarcely perceptibly longer than the third. Under 

 surface of abdomen very finely and closely punctulate. 



Male — Unknown. 



Female. — Posterior edge of the sixth ventral segment broadly and evenly 

 rounded behind. 



Length 2.8 mm. 



Veta Pass, Colorado, 1. 



I found this species labeled S. morio Grav., but as it differs in 

 several important particulars from that species, as described by 

 Kraatz — notably in the structure of tlie antennae and tarsi — I have 

 concluded to describe it as new. 



