380 TERTIARY INSECTS OF NORTH AMERICA. 



5. Nysius stratus. 

 PI. 23, Pigs. 14, 27 ; IM. 2.5, Fig.s. 2, 8. 



Body rather slender, being- about three times as long as broad. Head 

 rounded, subtriangular, of about equal length and breadth, or, if an ytliing, 

 a little broader than long, with the eyes slightly broader than the apex of 

 the thora.x, smooth. Antennae less than half as long as the body, the stout 

 basal joint projecting slightly beyond the front of the head, the second joint 

 very slender, the others gradually incrassated, so as to be fully half as broad 

 again in the middle of the apical joint as in the middle of the second joint, 

 the apical fully as long as the penultimate joint. Thorax trapezoidal, taper- 

 ing from base to apex gradually and regularh', with straight sides, some- 

 times a little ampliated, the apical distinctly more than one-half as long as 

 the basal margin, both truncate, or the apical A-ery slightly and roundly 

 emarginate, surface coarsely punctate like the scutellum. All the femora 

 rather stout, the fore and middle pairs of nearly equal length, the hind pair 

 a little longer, smooth ; all the tibiaj slightly longer than their respective 

 femora, slender. Corium of hemelytra with the apex reaching beyond the 

 middle of the abdomen, testaceous, with blackish fuscous blotches irregu- 

 larly distributed ; all the veins of the corium and clavus distinctly punctate ; 

 membrane nearly clear with testaceous streaks along the veins. 



Length of body, 4-.'i'"'" ; antenna;, 1.75-2"'"; breadthof body, 1.5-1.7""' 



This is the commonest of the Lygaeida; at Florissant. 



Florissant. Twenty-five specimens, Nos. 902, 1349, 1671, 3576, 4853, 

 4931, 6123, 6177, 6365, 6542, 7540, 10381, 10825, 10888, 10969, 11140, 

 11164, 12065, 12463, 12751, 13158, 14023, 14181, 14432, and from the 

 Princeton Collection 1.840. 



Sublamily aEOCORINA Stal. 



A single species referred below to Geocoris is the only fossil form ever 

 recognized in this family. 



GEOCORIS Fallen. 



This cosmopolitan genus, rich in species and about equally developed 

 in the Old and New Worlds, is more prolific in the northern than in the 

 southern hemisphere in the New World, the opposite in the Old World. It 

 has never been recognized in a fossil state, but a single species ajipears to 



