374 MEMOIRS ON THE COLEOPTERA 



similar but not quite so flat on the disk and with the similar rugi- 

 form sculpture rather less strongly developed; pygidium larger, 

 strongly convex, the rather sparse feeble crescentiform punctures 

 distinctly smaller, the base not impressed or opaque; propygidium 

 with the hind margin much more gradually becoming smooth; 

 legs long but still stouter; tarsi a little longer. Length (4 cf 1 ) 

 19.7-22.7 mm.; width 10.0-11.5 mm. Pennsylvania (Inglenook) 



and New York (Wingdale) rugosa n. subsp. 



B Female much smaller and narrower than the female of scabra 

 or rugosa and of brighter bronze lustre, the elytra rufescent; sur- 

 face shining; head nearly as in scabra (9) but with longer and 

 more slender palpi; prothorax as in the female of rugosa but 

 smaller and flatter; elytra narrower, nearly similar in sculpture, 

 two-fifths longer than wide, nearly one-half wider than the pro- 

 thorax and almost three times as long; scutellum unusually nar- 

 row, one-half longer than wide; pygidium more finely and feebly 

 scabriculate than in either scabra or rugosa and with an area at 

 apex smoother and with more widely isolated punctures; legs 

 rather more slender. Length (9) 19.5 mm.; width 8.8 mm. 

 Wisconsin (Cedar Lake). A single example, .gracilipes n. subsp. 

 4 Form stout, depressed above, piceous-black, feebly aeneous beneath, 

 strongly cupreous above and shining; head larger than in scabra, 

 very deeply concave, the concavity with very fine irregularly inter- 

 lacing lines and rather small scattered deep and conspicuous punc- 

 tures, not connected with the general sculpture, the base closely, 

 strongly punctate; clypeus three-fifths wider than long, very deeply 

 concave, the transverse line between it and the vertex high and 

 strong, the sculpture nearly like that of the vertex but somewhat 

 stronger and with the punctures not evident; apex very strongly 

 reflexed, feebly sinuate at the middle; prothorax large, barely a fourth 

 wider than long, the sides subangularly prominent distinctly before 

 the middle, thence oblique and nearly straight to the narrowly 

 rounded obtuse basal angles, oblique and straight anteriorly, the 

 angles blunt at tip; surface nearly as in scabra but rather more con- 

 vex, with much stronger medial anterior prominences and a longer 

 steep slope from their anterior ends to the apex; punctures moder- 

 ately coarse, confluent on the elevations, close laterally, rather 

 widely separated gradually toward base; scutellum large, long, with 

 many punctures, canaliculate only in about apical half; elytra broad, 

 only a fifth longer than wide, parallel, the sides only feebly arcuate, 

 the apex very broadly, obtusely rounded, two-fifths wider than the 

 prothorax, the sculpture nearly as in scabra but more finely com- 

 minuted; pygidium large, very transverse, convex, with small sparse 

 punctures, becoming gradually larger, dense and finally confused 

 basally, the surface along the base deeply impressed and opaque; 

 legs rather long as in the other species, the hind tarsi more than 

 two-thirds as long as the tibiae, somewhat thick but equal throughout 

 and moniliform. Length (i d 71 ) 25.0 mm.; width 13.0 mm. South- 

 ern shores of Lake Michigan caviceps n. sp. 



A Form nearly similar but shorter, the coloration darker and less 



