OOLEOPTEUA. 41 



meeting at nearly two lengths in advance ; antennae distinctly longer than 

 the width of head, moderately robust, piceous-brown, basal joint black, club 

 very slender ; third joint one-fourth longer than the fourth, fourth and fifth 

 equal, sixth and seventh joints much shorter than the fifth, equal in length, 

 the latter slightly more robust, eighth two-thirds as long as the seventh, 

 equal to it in width, joints of club increasing in length and thickness ; 

 maxillary palpi slender, first joint opaque, fiavate, second and base of the 

 third very slightly darker, piceo-flavate, remainder piceous-brown. Pro- 

 thorax widest much before the middle, where it is distinctly narrower than 

 long ; sides thence nearly equally convergent anteriorly and posteriorly, 

 distinctly arcuate in the former, nearly straight in the latter direction ; 

 anterior margin slightly longer than the posterior, equally arcuate ; surface 

 gradually, narrowly, and feebly swollen toward the basal angles, rather 

 coarsely, very closely, evenly, and sub-variolately punctured, punctures 

 polygonally crowded ; canaliculation very feeble, terminating at equal dis- 

 tances from the base and apex. Elytra at base much narrower than the 

 head ; sides moderately divergent posteriorly, very slightly longer than the 

 width at base, very feebly arcuate ; together broadly and feebly emarginate 

 behind; suture just perceptibly shorter than the pronotum ; surface rather 

 depressed, very feebly and narrowly impressed on the suture, rather coarsely 

 and closely punctate, punctures frequently coalescent near the middle of the 

 elytra, interspaces polished, minutely reticulated. Abdominal segments 

 decreasing sub-uniformly and extremely slowly in width, first three nearly 

 of equal width, and as wide as the contiguous elytra ; surface coarsely and 

 rather closely punctulate, punctures impressed, interspaces polished ; trans- 

 verse carinae tricuspid, middle cusps long and finely acicular, lateral very 

 rudimentary. Legs rather slender, rufo- fuscous, tips of femora darker ; 

 first joint of the posterior tarsi three-fourths longer than the second, second 

 slightly longer than the third. 



Male. — Fifth ventral segment scarcely modified ; sixth broadly truncate at 

 tip, truncation very feebly sinuate throughout nearly its whole length as in 

 Pettiti; seventh segment rather deeply emarginate at tip. 



Ft mull'. — Sixth segment very evenly rounded behind, somewhat narrow. 



Length 2.8-3.0 mm. 



Grimsby, Ontario, 1, 9; Tyngsborough, Massachusetts, 1, % . 



23. S. (liflicilis n. sp. (Schwarz MS.). — Form slender. Pubescence ex- 

 ceedingly fine and short, setiform ; longer, recumbent, and more abundant 

 at the tip of the abdomen, cinereous. Head rather large, twice as wide as 

 long ; interocular surface nearly flat, three times as wide as the eye, equally 

 trilobed by the very shallow, longitudinal sulcations ; intermediate surface 

 feebly convex ; finely, evenly, and somewhat closely punctured, interspaces 

 one-half as wide as the punctures ; ocular lines meeting at about two lengths 

 in advance ; antennae moderately slender, but very slightly longer than 

 width of head, piceous-brown, basal joint nearly black, club moderate ; third 

 joint one-half as long again as the fourth, fourth distinctly shorter than the 

 fifth, eighth short and sub-globular, joints of club increasing in length, last 

 two equal in width, last acuminate at tip ; maxillary palpi slender, first joint 



