260 TERTIARY INSECTS OF NORTH AMERICA. 



strongly, passing a variable distance into the body of the wing, and then 

 running longitudinally; it nowhere approaches closely the cubital vein, and 

 the stigmatic cell is at the most scarcely one-third the length of the wing. 



Length of body, 2.4 mm ; antenna-, 4.75"" 11 ; wings, 3.5-4 mni ; fore fem- 

 ora, l wm ; fore tibia' and tarsi, 1.25 mm ; middle tibia- and tarsi, 1.5 miB ; hind 

 femora, 1.2 mm ; hind tibiae and tarsi, 2 mm . 



Florissant. Three specimens, Nos. 519, 670", 2153. 



2. TEPHEAPHIS WALSHII. 

 PI. 18, Fig. 19. 



Little is preserved but the overlapping fore wings and these imperfectly. 

 They show the insect to have been very small with slender wings, probably 

 just about three times as long as broad. The first oblique vein is straight, 

 and parts from the postcostal at an angle of fifty degrees; the second is also 

 straight and parts at an angle of forty degrees, and the distance between the 

 two being great, the first discoidal cell is wide, but on the hind margin twice 

 as wide as at base. The cubital vein arises only a little farther from the 

 second oblique vein than it is from the first, and at about two-thirds the dis- 

 tance from the first oblique to the stigmatic vein ; with its first branch it is 

 completely parallel to the second oblique vein and straight, forking first at 

 about one-third of the distance to the hind margin ; it is not abruptly bent 

 at this fork, but curves rather rapidly to gain a longitudinal course, and forks 

 again a little less than half-way to the tip of the wing. The stigmatic vein 

 arises scarcely beyond the first fork of the cubital and curves rapidly to a 

 longitudinal course, but. the relative length of the slender stigmatic cell can 

 hardly be determined. 



Length of specimen, 4.25 mm ; probable length of wing, 3.5 mm . 



The late Benjamin D. Walsh was one of the first students of our 

 Aphides. 



Florissant. One specimen, No. 8085, lying entangled with Ptero- 

 stigma recurvum. 



9. APHIDOPSIS gen. nov. (Aphis, 



Head provided with short, broad, and uniform frontal tubercles, between 

 which, a space more than equaling the breadth of the antenna^, the front 

 is rounded and slightly advanced. First joint of antenna' distinctly nar- 

 rower than the frontal tubercles, scarcely longer than broad, scarcely narrow- 



