262 TERTIARY INSECTS OF NORTH AMERICA. 



straight, but slightly arcuate, parting from the postcostal at an angle of at 

 least fifty degrees ; second oblique vein hardly heavier, very feebly arcuate, 

 and parting from the postcostal at an angle of forty-five degrees ; it is 

 moderately distant at base from the first oblique vein, so that the first dis- 

 coidal cell between them is only about four times broader on the hind mar- 

 gin than at the base. Cubital vein arising half as far again from the second 

 oblique as it from the first oblique vein and only about one-third way from 

 the latter to the stigmatic vein ; it forks about one-third way to the hind 

 margin, and its first fork is completely parallel to and somewhat distant 

 from the second oblique vein; near its second fork it approaches twice as 

 near the stigmatic vein as the second oblique vein. Stigmatic vein not reach- 

 ing far into the wing, arising from a quarter to a third the distance from the 

 first to the second furcation of the cubital vein, so that the stigmatic cell is 

 slender and about two-fifths the length of the wing. Femora pale, tibia? and 

 tarsi dark. Abdomen plump oval, of a pale color, mottled with large, 

 roundish, dark spots arranged in inediodorsal and lateral rows on the 

 posterior portion of the segments ; there are faint indications of a slender, 

 slight, and rather short cauda, and distinct marks of cornicles in conical 

 hillocks at the extreme outer sides of the here angulated abdomen. 



Length of body, 3.75 mm ; antenna?, a"" 1 ' : fore wings, 5"""; fore femora, 

 1.3"""; fore tibia: and tarsi, 2.5 mm ; middle femora, 1.1"""; middle tibia? and 

 tarsi, -2.4""" ; hind femora, 2""" ; hind tibia- and tarsi, 3.3" 1 " 1 . 



Florissant. Six specimens, Nos. 21f>, 740, 1307, 2151, 7426, 8*96. 



2. APHIDOPSIS HARGERI. 



The single specimen which represents this species is preserved upon a 

 side view, with the wings somewhat crumpled. Enough, however, can be 

 seen to distinguish it from the preceding species in th.1t the cubital vein runs 

 at the ordinary distance from the stigmatic, though still distant from the 

 second oblique vein, and though the stigmatic vein descends as deeply 

 into the wing as in A. subterna. The origin of all the veins is the same, 

 but the second oblique is more arcuate and its arcuation confined mostly to 

 the apical half. But the principal difference is found in the relative length 

 of the legs, which though stouter are also longer and have the middle pair 

 slightly longer than the fore pair, instead of the reverse. The legs are 

 remarkably preserved and show the single jointed tarsus and claws with 

 great distinctness, showing them to be constructed much as in Callipterus. 



