176 TERTIARY INSECTS OF NORTH AMERICA. 



2. PAXORPA Linm?. 



A single species of this genus has been discovered in the Tertiaries of 

 Europe (amber) and wo add another from the Florissant beds. The former 

 has the wings of a uniform ash-gray. The wings of the latter are heavily 

 banded, very much more heavily than in most modern types. The living 

 representatives of this genus belong to the northern hemisphere, and in our 

 own country range from Canada to Mexico, so that the presence of the 

 genus at Florissant has no particular meaning. 



PANOKPA RIGIDA. 



The single specimen belonging here shows the tapering, attenuated 

 abdomen of a female with the larger part of most of the wings, of which 

 only the front pair are preserved in any recognizable manner. These show 

 the neuration tolerably well, and it agrees better with the living Panorpa 

 than with the contemporaneous Holcorpa ; but the subcosta is unusually 

 short, reaching just to the middle of the wing, and the cross- veins are few 

 in number. The wing is traversed by rather narrow transverse belts of a 

 dark color, on a clear ground, placed at equidistant intervals, besides hav- 

 ing the entire apex of the wing dark ; these belts are straight with straight 

 edges; one traverses the middle of the wing, one lies outside of it midway 

 between it and the apical patch, and a third as far from it toward the base 

 of the wing; the clear area between these belts is twice as broad as the 

 belts themselves. The costa is stout. The legs are very long arid very 

 slender, the tibia; rather sparsely spined. 



Length of wings (estimated), ll mi "; breadth of same, 3.5 mm ; length of 

 abdomen (estimated), \ J tum ; (hind!) tibia, (probably) 5"" u . 



Florissant. One specimen, No. 3213. 



Family TRICHOPTERA Kirby. 



The rarity of remains of caddis-flies in the Tertiary rocks of Europe 

 is not a little surprising. Oidy three species have been figured and a fourth 

 mentioned, all apparently represented by single specimens (from Aix, 

 Parschlug, Mombach, and the Isle of Wight). Another species has been 

 described from Greenland by Ilcer and from Chagrin Valley, Colorado, by 

 myself. That they were abundant is proven by the description of numer- 



