215 
straightness of the preefurca—in which particular they approach 
Cladoneura, just described. The stouter of the two further differs from 
modern species of Cladura in the form of the wings, as above re- 
marked, and in the somewhat greater distance of the great cross 
vein from the base of the discal cell. These differences seem to be 
no more than we should expect between living and tertiary forms 
in the same genus, and indicate the direction development has taken 
within relatively recent times. 
Table of the Fosstl Species of Cladura. 
Wings less than three times as long as broad, spotted; great cross vein striking 
middlejoflower marcinofidiscal cell. .i')..3).¢.0 04 bacce Sane sc maculata. 
Wings more than three times as long as broad,immaculate; great cross vein strik- 
ing lower margin of discal cell near the base.............2.00005 integra. 
Cladura maculata. 
Plas etic: 1 
Wings slightly less than three times as long as broad, spotted 
with brownish fuscous along the front margin, but otherwise hya- 
line; the largest of these spots is at the stigma, where it is more 
luteous and includes the marginal cross vein; the others are situ- 
ated next the humeral cross vein, midway between it and the base 
of the przefurca, at that base, at the subcostal cross vein, at the 
origin of the third longitudinal vein, and at the tips of the veins 
bordering the first submarginal cell. The auxiliary vein ends at 
the distal extremity of the middle fifth of the wing, earlier than 
the origin of the third longitudinal vein, and has the subcostal cross 
vein a very little way before its tip. - The prefurca arises at the 
proximal end of the middle fifth of the wing, is arcuate at extreme 
base, thereafter straight and a little divergent from the first longi- 
tudinal vein, and is a little shorter than the rest of the vein. The 
marginal cross vein lies at a less distance beyond the base of the 
first submarginal cell than the length of the petiole of that cell. 
The third longitudinal vein is abruptly bent a little beyond its base 
where the cross vein strikes it, and the second submarginal and first 
posterior cells are subequal in length and fully as longas the breadth 
of the wing. The petiole of the second posterior cell is shorter 
than the cell. The discal cell is about twice as long as broad, sub- 
equal and a little shorter than the posterior cells beyond it. The 
