140 NORTH AMERICAN 



longitudinal elevation slightly narrower than the lateral portions, feebly and 

 evenly convex ; sulfations rounded, distinct ; punctures rather fine, round, 

 -somewhat shallow and confused ; interspaces very strongly and conspicuously 

 granulate, feebly shining ; ocular lines meeting at slightly more than one- 

 half a length in advance ; antennae very short and robust, scarcely as long 

 as the width of head, piceous-black, club moderate ; third joint very short, 

 scarcely one-fifth longer than the fourth, joints four, five, and six decreasing 

 uniformly and just perceptibly in length, six and seven equal in length, 

 the latter scarcely perceptibly thicker, eighth very slightly elongated, sub- 

 globular, as thick as the seventh, joints of club very short, tenth slightly the 

 broadest ; maxillary palpi rather long and slender, piceous-black, first joint 

 dark piceo-testaceous. Prothorax arcuately, evenly, and very gradually in- 

 creasing in width to a point slightly behind the middle, where it is slightly 

 more than three-fourths as wide as the head and much narrower tban long; 

 sides thence very feebly convergent posteriorly, very short and feebly sinuate ; 

 anterior and posterior margins equal in length, the former very arcuate, the 

 latter very feebly so; surface tuberculate near the basal and apical angles, 

 distinctly swollen along the sides of the canaliculation ; sculpture similar to 

 that of the head ; canaliculation broad, deeply impressed, nearly equal in 

 width throughout, terminating at equal distances from the base and apex, 

 four-fifths as long as the pronotum, conspicuous. Elytra at base as wide as 

 the bead ; sides very feebly divergent posteriorly, longer than the width at 

 base and strongly arcuate ; together broadly, roundly, and strongly emargi- 

 nate behind; suture one-fourth longer than the pronotum; surface nearly 

 evenly convex, very closely, deeply, rather finely, confusedly, and coales- 

 cently punctate ; interspaces very acute, coarsely granulate, feebly shining. 

 Abdominal segments decreasing uniformly and rapidly in width, first much 

 narrower than the contiguous elytra, cylindrical ; border obsolete except a 

 very obscure one on the first segment; surface very coarsely granulose, 

 coarsely, very closely, feebly, and variolately punctulate ; transverse carinae 

 tricuspid, cusps closely approximate, long, rather finely acuminate, promi- 

 nent. Legs rather long and slender, piceo-fuscous, paler and rufous be- 

 neath ; first joint of the posterior tarsi two-thirds longer than the second, as 

 long as the second and third together, and as long as the fifth, joints two to 

 four uniformly decreasing in length. 



Male. — Unknown. 



Female. — Sixth segment small, very broadly and just perceptibly angulate 

 at tip. 



Length 2.2-2.5 mm. 



Fort Garland, Colorado, 2. 



120. S. pilgeteiisis n. sp. — Form slender. Pubescence rather long, 

 coarse, abundant, recumbent, and cinereous on the abdomen, very short, 

 sparse, and inconspicuous on the remainder of the upper surface. Head 

 moderate, robust, scarcely twice as wide as long ; interocular surface very 

 moderately depressed, two and one-half times as wide as the eye ; evenly, 

 rather finely, and somewhat closely punctate ; interspaces fiat, minutely 

 reticulated, somewhat shining ; longitudinal elevation distinctly narrower 



