COLEOPTERA. 63 



finely, and confusedly sculptured ; punctures only isolated near the inner 

 basal angles, elsewhere coalescent in very long channels, 'which are usually 

 longitudinal near the suture. Abdominal segments decreasing uniformly 

 and moderately rapidly in width, first notably narrower than the contiguous 

 elytra : surface rather convex, highly polished ; feebly, finely, closely, and 

 evenly punctulate ; transverse carinae tricuspid, middle cusps fine and 

 acieulate, lateral broad, large, and very confusedly outlined. Legs rather 

 short and slender, black above, piceous-brown beneath; first joint of the 

 posterior tarsi four-fifths as long again as the second, slightly longer than 

 the last, and equal to the second and third together. 



Male. — Fifth ventral segment not modified ; sixth segment sinuate at apex, 

 sinus and apices equal in width and curvature, sinus twice as wide as deep ; 

 seventh segment feebly emarginate at tip, emargination evenly rounded and 

 very slight, teeth not developed. 



Fondle. — Unknown. 



Length 3.3 mm. J, 



Washington Territory, 1. 



44. S. COnftlSUS n. sp. — Form moderately robust. Pubescence exces- 

 sively fine, sparse, and short, setiform, cinereous. Head rather large, twice 

 as wide as long ; interocular surface feebly excavated, twice as wide as the 

 eye, finely, rather closely, and evenly punctured ; punctures round and 

 sometimes partially coalescing ; longitudinal elevation narrower than lateral 

 portions, strongly and evenly convex, prominent, crest impunctate ; ocular 

 lines meeting at one length in advance ; antennae scarcely longer than the 

 width of head, rather slender, club distinct, dark piceous-brown ; third joint 

 one-third as long again as the fourth, fourth and fifth equal, sixth and 

 seventh equal in length, shorter, eighth elongated, broader than the sixth, 

 joints of club increasing uniformly in length and thickness ; first joint of 

 maxillary palpi rufo-testaceous, base of second darker, remainder piceous. 

 Prothorax widest at one-third its length posteriorly, where it is three-fourths 

 as wide as the head and very slightly narrower than long ; sides thence yvy 

 moderately convergent and nearly straight ; anterior margin more arcuate 

 aud just perceptibly shorter than the posterior ; surface faintly bituberculate 

 at the sides, feebly and transversely impressed behind the anterior margin; 

 finely and somewhat evenly punctate, interspaces one-half as wide as the 

 punctures, rather flat, shining ; canaliculation distinct, fusiform, deeply 

 impressed, beginning just before the middle and extending posteriorly for 

 two fifths the total length. Elytra at base distinctly narrower than the 

 head ; sides moderately divergent posteriorly and nearly straight, longer 

 than the width at base ; together very broadly and triangularly emarginate 

 posteriorly; suture slightly longer than the pronotum ; surface convex, im- 

 pressed along the suture, strongly so at base; each elytron also has a short 

 longitudinal impression in the middle at the base ; finely and irregularly 

 punctured, punctures widely separated near the inner basal angles, closely 

 crowded near the middle and exteriorly, interspaces flat, polished. Abdo- 

 minal segments decreasing excessively gradually but uniformly in width, 

 first somewhat narrower than the contiguous elytra ; surface broadly convex, 



