416 TERTIARY INSECTS OF NORTH AMERICA. 



heraelytra rather heavily but not very deeply punctate, the punctae distrib- 

 uted only in part in longitudinal series and not confined to the veins ; the 

 corium about as long- as in the preceding species, or rather shorter ; not so 

 short as represented in the figure, but extending as far as the membrane is 

 there represented. Legs short but slender. 



Length of body, 6.65 mm ; of antenna?,2.25 mm ; breadth of thorax, 2 25""" 

 Florissant. Three specimens, Nos. 9451 and 10961, 10G13, 12256. 



4. PHTHINOCORIS PETROUS. 



This species is represented by specimens less well preserved than the 

 others, but differs from them all in its much larger size and in the structure 

 of the thorax. The head is distinctly broader than long, more than half as 

 broad as the thorax, distantly and very finely granulate ; the basal joint of 

 the antennae is pretty stout, but very short and but little surpasses the front 

 of the head. The thorax is twice as broad as long, the sides tapering rapidly 

 but full, the surface coarsely and very distantly granulate ; the whole body 

 is black or blackish fuscous with faint signs, in some instances at least, of a 

 broad belt of lighter color across the body including in its anterior half the 

 scutellum. Corium of hemelytra marked by coarse distant granulations 

 following the veins ; it extends to no great distance before the tip of the 

 abdomen. 



Length of body, 9.5 mm ; breadth of thorax, 3.1 mm . 



Florissant. Four specimens, Nos. 7769, 9999, 10366, 11766. 



4. PIEZOCORIS, gen. nov. (iti%w, uopts). 



A genus of Coreina peculiar for the large size of the head ; this is fully 

 one-half, sometimes two-thirds, the width of the thorax, subtriangular in form 

 and well rounded, rather broader than long, the front rectangular, produced 

 in front of the eyes ; the latter are rounded, prominent, the intraocular space 

 being as broad as half the length of the head. Antennae much as in Phthin- 

 ocoris, the basal joint moderately stout, cylindrical, less than one-half as 

 long as the head, the remaining joints subequal, the second and third slen- 

 der, about half as broad as the basal, the last incrassated, subfusiforrn, 

 nearly as stout as the basal. Thorax fully as long as the head, tapering, the 

 apical margin more than half as long as the basal. The hemelytra of the 



