476 Mr. T. D. A. Cockerell on Fossil Arthropods: 
very surprising discovery, but I know of no organism 
which the fossil could represent, except the genus to which 
I refer it. The other Flatine are variously marked, but 
not in this manner. 
Aphidide. 
Aphis (sens. lat.) gurnetensis, sp. n. (Fig. 43.) 
Wing 3:2 mm. long, hyaline ; Mp, Cu, Sc+#, and margin 
of stigma dark brown, the other veins colourless. 
Aphis (sens. lat.) gurnetensis, sp. n. 
H. 1124, collected in 1891. A very ordinary Aphid, 
which cannot be placed in a modern genus from the wing 
alone. : 
Psyllide. 
Livilla hooleyi, sp. n. (Fig. 44.) 
Wing (elytron) 3 mm. long, with dark veins ; venation 
nearly as in the living species, but the second cubital fork is 
more gibbous above. 
Fig. 44. 
eet tt 
Livilla hooleyt, sp. nu. 
Type, H. 430, with the reverse, H. 445, Another speci- 
men (H. 449) has what seems to be an oblique vein 
