620 Goleopterological Notices, VTI. 



dorsal segment. Head a little wider than long, quite distinctly narrower than 

 the prothorax; eyes large, very coarsely faceted and separated by a little less 

 than three times their own width; foveae forming a small equilateral triangle; 

 constriction at the base of the frontal tubercle more than }4 ^s wide as the lat- 

 ter. Antenna nearly as long as the head, prothorax and elytra, moderately 

 stout, feebly incrassate toward tip, the fifth joint elongate, a little longer than 

 the fourth but shorter than the sixth; tenth much shorter than the ninth, the 

 eighth quadrate. Prothorax nearly }4 wider than lonj;^, about }4 as wide as the 

 elytra; sides parallel to apical third or fourth, then abruptly convergent and 

 sinuate; apex broad, truncate, almost % as wide as the base; median fovea very 

 deep and large, extending beyond the middle. Elytra large and well devel- 

 oped, almost as long as wide, the sides strongly divergent and nearly straight, 

 becoming arcuate near the tip; humeri broadly rounded and slightly promi- 

 nent ; two basal foveae of each pubescent as usual, the discal groove deep and 

 strong, entire, the sutural distinct, close to the suture. Abdomen about as wide 

 as the elytra and much shorter, the segments equal and the lateral border wide, 

 feebly inclined and discontinuous in external outline as usual. Legs long 

 and slender, the tarsi very short but slender. Length 1.7-1.8 mm; width 

 0.72-0.8 mm. 



Michigan; Indiana; Northern Illinois; Iowa (Iowa City). 



This is the common species of the upper Mississippi Valley and 

 vicinity of the Great Lakes. It is usually confounded with piceus, 

 but may be distinguished by its more elongate and pale rufous 

 elytra. In the female the elytra are a trifle shorter, and much less 

 than twice as wide as the prothorax, the eyes smaller, separated by 

 fully four times their own width, and the antennae shorter and 

 more strongly and rapidly incrassate toward tip as usual ; they 

 are about ^ as long as the body. 



P. saginatus. — Stout and moderately convex, shining and pale rufo-tes- 

 taceous throughout the body, legs and antennae, except the abdomen which is 

 blackish-piceous, subimpunctate, the pubescence nearly as in lacustris. Head 

 distinctly wider than long and but just visibly narrower than the prothorax, 

 the eyes large and very prominent, separated by three times their own width; 

 fovese small, deep and not very conspicuous, especially the apical, forming a 

 small equilateral triangle; post-tubercular constriction ^ as wide as the tuber- 

 cle; frontal longitudinal groove distinct and long. Antennae long and stout, as 

 long as the body excepting the abdomen, becoming gradually very stout to- 

 ward tip; fifth joint moderately elongate, as long as the fourth, slightly shorter 

 than the sixth and very much shorter than the third ; tenth distinctly shorter 

 than the ninth, scarcely as long as wide. Prothorax % wider than long, rather 

 wider and subprominently rounded at apical third than at base, a little more 

 than 3^ as wide as the elytra; apex broad and transverse; median fovea long, 

 extending to the middle but only moderately deep. Elytra slightly shorter 

 than wide, the sides moderately divergent and nearly straight from the obtusely 

 prominent humeral swelling, arcuate at apex; strise strong and deep, the 



