528 TERTIARY INSECTS OF NORTH AMERICA. 



is indicated of about the same size as P. hudsonicus LeC. and closely 

 resembling- it. The elytra are piceous, with a metallic-blue reflection; there 

 are nine distinctly and rather deeply and equally impressed striae, rather 

 faintly and not very profusely punctate ; the interspaces appear as if 

 minutely cracked, and with a simulation of excessively faint and small foveae 

 throughout, while the third has a more distinct, though still rather shallow 

 and rather large fovea considerably behind the middle of the apical half of 

 the elytra; a second fovea appears in the third interspace, as far from the 

 apiral fovea as that is from the apex, but it is situated laterally, encroaching 

 on the stria next its inner side. It is perhaps due only to an excess of the 

 simulating fovea' that there is apparently a row of approximated punctures, 

 quite like those of the neighboring strife, for a very short distance between 

 the base of the sixth and seventh stria?. The first stria turns outward next the 

 base, to make room for a scutellar stria. The obliquely cut marginal 

 fovea^ agree with those of P. hudsonicus. The prothorax is quadrate, the 

 front margin very slightly angled, the sides broadly rounded, fullest ante- 

 riorly, with an exceedingly slight median sulcus (indicated by a slender 

 crack), and more distinct posterior sublateral sulci (indicated by wider 

 cracks), and between which the hind border is scarcely convex. The sur- 

 face of the prothorax is smooth ; the abdomen is also smooth. The part of 

 the mandible remaining is only the basal " molar" portion, armed with six 

 or seven mammilate conical teeth, or rather transverse ridges. 



Length of elytron, 5.75 mm ; breadth, 2 miu ; length of prothorax, 2.25 mni ; 

 breadth, 3.5 mm ; breadth of abdomen, 2.25 mm . 



The species differs from P. hudsonicus in the shape of the prothorax 

 (if that belongs here), broader strife, and less convex elytra. 



Interglacial clays of Scarboro Heights, near Toronto, Canada. Sev- 

 eral specimens, among others Nos. 14521, 16418 (G. J. Hinde). 



PTEROSTICHUS L^VIGATUS. 

 PI. 1, Figs. 3, 4. 



Ptcroslirliiix lii'i-it/atii* Horn, incd. 



PteroKticliua sp. Horn, Trans. Ainer. Eut. Soc., V, 243 (187R). 



" Fragments of two elytra. Elytra striate, stria- impunctured, inter- 

 vals moderately convex, smooth. 



"A species apparently of the size of coracinus or stygicus is indicated, 



