1 82 MEMOIRS ON THE COLEOPTERA 



preceding, the geminate series less impressed and less closely punc- 

 tate, the punctures all very shallow and annular; pygidium very 

 convex, nearly as in clypealis; anterior tibiae with the fourth tooth 

 very obtuse and feeble but sharply defined by a very small deep 

 notch; larger claw of the male with the apex produced in a short 

 but slender aciculate styliform process, in extension of the straight 

 inner margin, the outer margin broadly arcuate and gradually 

 converging to the base of the stylet. Length (cf ) iS.o mm.; width 



9.4 mm. Iowa (Keokuk) parviceps n. sp. 



Head much less small in size and only slightly more or less than t\\'o- 



fifths as wide as the prothorax 5 



5 Elytra short, barely at all longer than wide 6 



Elytra distinctly elongate, not differing much sexually 7 



6 Body short, oblong, broader than in the preceding and only barely 

 visibly inflated posteriorly, black to paler, shining; under surface 

 castaneous, the legs blackish-piceous; head barely two-fifths as wide 

 as the prothorax, in form and sculpture nearly as in relictus Say, 

 the two transverse prominences sloping almost similarly to the rather 

 shorter and more concave clypeus, the oblique sides of which are 

 more sinuate, the apex rather more obtuse, the teeth erect and tri- 

 angular but often worn down and broadly obtuse; prothorax three- 

 fifths wider than long, the sides broadly rounded, strongly converging 

 apically, becoming parallel basally; lateral bead rather thin; punc- 

 tures sparse, very much as in the preceding; scutellum with minute 

 scattered punctures centrally; elytra barely sensibly longer than 

 wide, a fifth or sixth wider than the prothorax, broadly rounded in 

 about apical third; punctures sparse, shallow and annular, arranged 

 as in the preceding species; pygidium densely scabriculate, becoming 

 polished and with discrete, well separated but unevenly distributed 

 punctures in nearly median third; fourth tooth of the anterior tibiae 

 obtusely rounded but distinct, the larger claw of the male as in 

 relictus. Length (cf 9 ) 18.4-19.0 mm.; widthio. 4-11.0 mm. Texas, 



Louisiana and Illinois quadripennis n. sp. 



7 Form subcylindric-oval, convex, rather stout, deep black and polished, 

 the under surface and legs rather dark castaneous; head barely two- 

 fifths as wide as the prothorax, closely, rather sharply rugulose, 

 smooth at base, the transverse interrupted ridge low but attaining 

 the sides, the anterior slopes finely and clearly punctate; trapezoidal 

 clypeus with the sides feebly sinuate, the apical teeth acute and 

 sharply upturned; last antennal joint (cf ) three-fourths as long as the 

 stem; mentum smooth and polished anteriorly; prothorax slightly 

 more than one-half wider than long, in form nearly as in the pre- 

 ceding species, the sparse punctures distinct, moderately coarse; 

 scutellum ogival, wider than long, with a few distinct scattered 

 punctures; elytra a fourth or fifth longer than wide, barely at 

 all wider than the prothorax in either sex and only very feebly 

 inflated posteriorly, broadly rounded at apex; sculpture as in the 

 preceding species; pygidium (cf ) nearly as in quadripennis; in the 

 female it is similar and equally convex but becomes scabriculate 

 only nearer the sides and there more coarsely and less densely; 



