NEUllOi'TERA— PLANIPENNIA— HEMEKOIUNA. ' 171 



Almost the entire neuration of the upper wing can be made out as well as 

 the lower half of that of the under wing ; the front wing is three times as 

 long as broad, the costal margin uniformly arched, the basal expansion 

 forming only a regular part of the curve ; the lower margin is similarly 

 curved but not very full, the wing being broadest nearly as far out as the 

 middle of the outer half: the costal area is not very broad nor unequal; 

 the subcostal vein terminates at the end of the middle third of the vving, and 

 is connected with the costa by twelve or thii'teen cross-veins, mostly slightly 

 oblique. There are ten subradial cells. The upper cubital vein, which 

 springs from a short cross-vein uniting the radius and lower cubital vein, in 

 the middle of its course and somewhat beyond the middle of the wing shifts 

 suddenly to a higher level and follows thereafter a direction nearly parallel 

 to the costal, instead of, as before, the inner margin ; in the first half of its 

 course it runs below the middle of the wing, in the latter half above it; 

 consequently the four cells which lie between its proximal half and the sub- 

 costa are very much elongated subrhomboidal in form, the first subtriangular, 

 while beyond the shift they are somewhat regularly hexagonal ; on the 

 other hand the cubital cells, scarcely longer than broad at first, become in 

 the outer part of the wing twice as broad as long and also very oblique. 

 The basal cubital cell is divided longitudinally into two unequal parallel 

 cells, the upper the narrower ; the cross-veins next the lower margin are 

 simple in the basal half of the wing, simply or doubly forked on the distal 

 half. The postcostal terminates abruptly on the hind margin, slightly far- 

 ther out than the origin of the sector of the radius, and is connected near the 

 apex by a cross-vein which is the continuation of that closing basally the 

 double cubital cell. The neuration of the hind wing, only the lower half of 

 which is preserved, does not diff'er from that of the front wing in the slightest 

 essential paiticular. 



This species differs from T. firmata, to which it is closely allied, by its 

 larger size, the greater number of cells below the sector (as indicated in the 

 table of the species), and its broader costal area. 



Length of body, ll""; of front wing, 14.75°"" ; breadth of same, 4.8°"". 



Florissant. One specimen. No. 7982. 



