HEMIPTEKA— HETEROPTEKA— LYG^ID.E. 381 



occur jit Florissuiit, where its striking breadth of head and stout fore femora 

 distinyuisli it from all other forms. 



Geocoris infernorum. 

 PI. 23, Figs. 17, 26. 



Head broadly rounded in front without the least sign of being pro- 

 duced, in which it diifei's strikingly from all existing species I liave been 

 able to examine ; twice as broad as long, with the small eyes just as broad 

 as the front of the thorax ; antennae shorter than head and thorax com- 

 bined, very slender, cylindrical, with no enlargement anywhere, the second 

 joint longest, the third and fourth successively shorter. The thorax is 

 nearly or quite twice as broad as long with gently convex sides, scarcely 

 narrower in front than behind, and the angles hardly rounded ; the surface 

 is very feebly punctate. Hemelytra with the corium hardly reaching 

 beyond the middle of the abdomen, very opaque fuscous with pale patches 

 or streaks following the course of the veins ; membrane invisible. -Legs 

 short, the fore femora (when turned so as to see the broader face) very 

 stout, rotund, not more than half as long again as broad. Abdomen very 

 broad and full. 



Length, 3.25""" ; breadth, 1.45"™. 



Florissant. Six specimens, Nos. 5610, 5734, 5864, 6888, 6483, 13152. 



Subfamily OXYCARENINA Stal. 



This group, much more highly developed in the Old World than in the 

 New, has never been found fossil there ; but here we have an extinct genus, 

 Procrophius, in the shales of Florissant, with three species. 



PROCROPHIUS gen. nov. (^po, Crophius, nom. gen.). 



The brevity of tlie antennae and of the corium at once distinguish this 

 from any living forms of Lygfeidae with which it would appear to be related, 

 and with which from its abundance in the rocks we should perhaps the 

 more expect to find relationship. The brevity of the corium distinguishes 

 it from Ischnorhynchus with which its general form agrees, especially with 

 the Central American species, and I can find nothing nearer to it than Cro- 

 phius, from which it differs decidedly in the antennae. The head is trian- 

 gular, shorter than broad, together with the eyes of the same breadth as the 



