HEMIPTERA— HETEROPTERA— COREIDJ;;. 433 



CORIZUS Falle'n. 



Two fossil species have already been referred to this genus, both from 

 Aix. One, however, as shown by Heer, belong-s rather with Pacliynierus, 

 and the other is merely indicated as being half the size of Theraplia 

 liyoscyami of Europe. In America the genus is best developed witliin 

 the tropics, but has abundant representatives in the United States. Three 

 of the Florissant Heteroptera appear to fall within its limits, and a Grreen 

 River species, which I formerly took for a Reduvius, appears also to belong 

 here. 



Table of the species of Corizus. 



Without an iuterrupted series of lateral spots. 



Smaller forms, not exceeding live millimeters in length 1. C. cetatiis. 



Larger forms, exceeding six millimeters in length. 



Body relatively stout, about three times as long as broad 2. C. ahijilinis. 



Body relatively slender, nearly four times as long as broad 3. C. somniirniis, 



Au interrupted series of lateral spots 4. C. giillaliis. 



1. CORIZUS CELATUS. 



PI. 27, Fig. 15. 



Head a little broader than long, with the eyes a little broader than the 

 apex of the thorax, subtriangular, the front angularly produced between the 

 anteniiEE, the basal joint of which seems barely to surpass the apex of the 

 front ; the remaining joints slender. Thorax half as broad again as long, 

 tapering forward with slightly ampliated sides, the front margin gently and 

 broadly emarginate, scarcely more than half as long as the base, the surface 

 densel}" and sharply punctate, and a faint sign of a median sulcation. 

 Corium of hemelytra reaching a little beyond the middle of the abdomen, 

 clear excepting along the finely punctate principal veins and near the outer 

 apex, which is wholly clouded. Abdomen dark, with broad premarginal 

 pale lateral bands. 



Length, 5""" ; breadth of thorax, 1,9™"'. 



Florissant. Three specimens, Nos. IDo'J, C)36d, 14205. 



2. CORIZUS ABDITIVUS. 

 PI. 25, Fig. 5 ; PI. 26, Fig. 4. 



Body relatively stout, about tliree times as long as broad, the head 

 rounded, hardly subtriangular, considerably broader than the apex of tlie 

 thorax, the front roundly produced between the antennae, the basal joint of 



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