334 TERTIARY INSECTS OF NORTH AMERICA. 



This genus seems to tall somewhere oetween Cephisus and Avernns, 

 but the structure of the hind legs is not known. It was an abundant type 

 in the Florissant basin, five species being already known, most of them by 

 a considerable number of examples. 



Table of the species of Palaphrodes. 



Middle of the tegmina traversed, at least on the costal edge, by a black band ; no long baso-costal 



stripe. 

 Middle stripe of tegmiua distinctly traversing the wing transversely without change of breadth ; 



neuration distinct 1. P. cincta. 



Middle stripe of tegmina not distinctly traversing the wing transversely without change of breadth ; 



neuration indistinct. 

 Middle stripe of tegmina confined to a spot on the costal edge and this usually somewhat 



obscure 2. P. obscura. 



Middle stripe of tegmiua directed obliquely outward. 



SubRpical costal stripe of tegmina moderately oblique and moderately broad, with irregular 



margins '.1. P. irregularis. 



Subapical costal stripe of tegmiua very oblique, very slender, with sharply defined straight 



margins 4. P. obligua. 



Middle of the tegmina traversed by a pale baud ; a long and broad baso-costal dark stripe. 



5. P. trantveria. 



1. PALAPHRODES CINCTA. 

 PI. 20, Fig. 16; PI. 21, Fig. 15. 



Body uniformly dark colored, the incisures of the abdomen paler. The 

 species is distinguished by the markings of the tegmina and the distinctness 

 of the neuration, the latter due to its being traced in black throughout the 

 apical half of the wing ; the ground of the tegmina is pale, perhaps diapha- 

 nous ; the base is blackish, making here a large triangular patch with very 

 irregular outer outline ; across tile middle of the wing, separated from the 

 basal patch by the length of the latter, is a broad, equal, straight, transverse, 

 blackish stripe or bar often deepest in color on the costal half or becoming 

 fuliginous on the inner half; its edges, and especially its upper, are tolerably 

 straight. It is followed at an equal distance on the costal margin by a 

 slender, oblique, black, and narrowing stripe just before the apical cells, 

 generally running about half-way across the wing, parallel to the hind 

 margin. 



Length of body, 9.5 mm ; breadth of thorax, 3.3"""; length of tegmina, 

 X""" ; breadth of closed tegmina together, 5.5 mm . 



Florissant. Thirteen specimens, Nos. 208, 582, 6908, 112.-5S, 12094, 

 13555, 13573, 14234, perhaps lt>32, and of the Princeton Collection 1.505, 

 1.813 and 1.841, 1.815 and 1.839. 



