HEMIPTERA HETEROPTERA LYGJ5II).*:. 393 



in advance of the antenna- : eyes moderately large, situated just in advance 

 of the base; antenna- as long as the head and thorax together, the basal 

 joint clearly surpassing the front, the subsequent joints subequal, the 

 second not longer than the others, slender, the fourth incra.-sate through- 

 out, but largest in the middle, where it is twice as broad as the middle of 

 the second joint. Thorax longer than broad, the posterior about two- 

 thirds as long as the anterior lobe, of equal length throughout, with straight 

 and parallel sides, the anterior lobe tapering from base to apex with oblique 

 straight sides; posterior margin of the thorax truncate, anterior scarcely 

 emarginate. Legs moderately stout, middle femora not more than two- 

 thirds as long as the breadth of the bod}' at their insertion. (Jorium i.f 

 hemelytra reaching nearly or quite to the middle of the apical half of tin- 

 abdomen. Abdomen broad ovate. 



Two species are known, both of which occur only at Florissant. 



Tablr of the HjH-ciex of f'rocorii. 

 Third joint of antenna- of nearly equal width throughout : femora relatively slender. 



1. /'. '<ln> ? ','"<;> r i - 



Third .joint of antenna' considerably enlarged apieully : femora relatively Htout -J. /'. bfchlrri. 



1. 1'ROCORIS SANCTVEJOHANNIS. 



Whole body uniform black or blackish fuscous: antenna- of the 

 same color as the head or perhaps not so dark, but in anv case much infus- 

 cated, the third joint of nearly equal width throughout, scarcely enlarged at 

 the apex. Head smooth or perhaps faintly and very finely punctate. 

 Thorax and scutellum coarsely and rather distantly punctate, the puncta- 

 <in the hemelytra arranged linearly along the course of the veins. Femora 

 only moderately stout, fully three times as long as broad. Abdomen rather 

 full, with ampliated sides 



Length, C.I""" : antenna-. 2. io""" : breadth of thorax, l.X~>""": abdomen, 

 2.5""". 



The name of the species is given in honor of Mr. Oivsfes St. John, 

 geologist of the FTayden Survey, a pioneer of much \\ork in the W<-si. 



Florissant. Four specimens, Xos. 3556, 4C>8, 7USS, lo/iiii). 



_'. I'ROCOKIS BKCHI.KRI. 

 PI. 27. Fi-. 4. 



Head faintly and rather coarsely punctate, and, like the whole body, 

 black or blackish brown, the antenna- a little lighter colored, the third joint 



