COLEOPTERA. 97 



Lake Superior (locality not specified), 16; Capron, Florida, 5 ; 

 Sand Point, Florida, 2 ; Middle States, 1 ; Southern States, 2 ; Cam- 

 bridge, Massachusetts, 1 ; Waverly, Massachusetts, 1 ; Willets Point, 

 Long Island, 1 ; California, 1 ; Arizona, 1. 



A very widely distributed species, and easily recognized. In some 

 specimens there is a very feeble indication of a canaliculation near 

 the middle of the pronotum. 



The parasite of this species is scarcely as long as the third joint 

 of the maxillary palpi, nearly circular in outline, rather strongly 

 convex, pale reddish-testaceous, and extremely highly polished ; it is 

 transversely segmented at two-thirds its length posteriorly, and at 

 the posterior tip bears four or five short cinereous setae. 



76. §. mammops n. sp. — Form very moderately robust, sides parallel. 

 Pubescence rather short, semi-erect, fine, moderately close, cinereous. Head 

 large, twice as wide as long; interocular surface twice as wide as the eye, 

 nearly flat ; longitudinal elevation slightly wider than the lateral portions, 

 evenly and rather strongly convex ; sulcations scarcely visible; punctures 

 variolate, rather coarse, closely crowded, nearly evenly distributed, poly- 

 gonal in outline ; ocular lines meeting at less than one length in advance ; 

 antennae slightly longer than the width of head, slender, club moderate, 

 basal joint black, remainder rather dark piceous-brown ; third, fourth, and 

 fifth joints decreasing uniformly aud very gradually in length, sixth and 

 seventh sub-equal in length, the latter much the more robust, eighth as long 

 as the ninth, much shorter than the seventh, very robust, narrowed at base, 

 joints of club increasing in length, the last two equal in width and somewhat 

 more robust than the ninth ; maxillary palpi rather pale piceous-brown, 

 basal joint and first third of the second much paler fiavo-testaceous. Pro- 

 thorax very large and robust, arcuately, evenly, and rather rapidly widening 

 to a point slightly behind the middle, where, it is five-sixths as wide as the 

 head, and just perceptibly narrower than long ; sides thence rapidly conver- 

 gent and very slightly sinuate ; anterior margin slightly shorter and much 

 more arcuate than the posterior, the latter nearly transverse ; surface rather 

 strongly tuberculate near each basal angle, tuberculations very widely sepa- 

 rated; also transversely and very feebly impressed just behind the anterior 

 margin ; finely, very closely, rather feebly, and very confusedly punctate. 

 Elytra at base much narrower than the head, scarcely wider than the pro- 

 thorax ; sides strongly divergent posteriorly, as long as the width at base, 

 feebly and evenly arcuate ; together broadly, somewhat angularly and 

 rather deeply emarginate behind ; suture distinctly shorter than the prono- 

 tum; surface depressed, nearly even, very roughly, evenly, closely, finely, 

 and confusedly punctate. Abdominal segments decreasing uniformly in 

 width and with extreme slowness, first slightly wider than the contiguous 

 elytra ; surface coarsely, feebly, rather closely, and evenly punctulate ; be- 

 coming much more finely so toward the vertex ; transverse carinae tricuspid, 

 middle cusp stroug, finely acuminate at tip, becoming much shorter on the 

 posterior segments, lateral short, rudimentary, and generally bifid, except on 

 Stenini. 7 



