( cxxviii ) 



each other, and frequently to obscure the disc. This is large 

 and chestnut-sliaped. A simihir brand to that seen in 

 T. celestina and T. dementina exists in Tadiyris placidia, but 

 in this case it is dark instead of pale. The plume-scales here 

 are again numerous, and not unlike those of T. celestinn from 

 the coi-responding situation. They are sagittate, tapering 

 from base to apex ; the cornua are here far less marked than 

 in the scales from the forewing — a quite exceptional ari'ange- 

 ment. The disc is very large, with an evident internal 

 chitinous tubing ; it is pyriform or flask-shaped with proximal 

 aperture. The fimbriatiou is sometimes unsymmetrical, being 

 continued further down from the apex on one side than on the 

 other. 



Tachyris zarinda possesses on its forewing an array of scent- 

 scales somewhat resembling those of T. celestina ; and, like them, 

 not very numerous. The laminae are somewhat broader than in 

 that species ; the sides show a very slight distal convergence; 

 the base is nearly square, and the disc is moderate in size, 

 oval or triangular. There is no very evident scent-patch on 

 the hindwings ; but scales from the position occupied by the 

 patch in other species of Tacliyris have laminae that are cordate 

 with a sharp apex, like those of T. celestina and other forms 

 just described. They are, however, generally broader and 

 show less indication of cornua. The disc is large, though not 

 so lai-ge as in the preceding species ; it is chestnut-shaped, has 

 a slight proximal projection, and usually a very distinct 

 proximal orifice. 



In Tachyris ttero there is less difference between the scent- 

 scales of fore- and hindwing than we find in the allied forms 

 above mentioned. The scales from the forewing are like 

 those of T. za/rinda, but their laminae have parallel sides and 

 rounded bases. The apex is less sharp than in T. zarinda, 

 and the disc is smaller. Scent-scales in the situation of the 

 brand are not numerous ; the laminae are broader than in 

 those from the fore-wing, and there is a slight indication of 

 cornua. The apex is sharper, though again less sharp than in 

 T. zarinda and other allied forms, and the sides are nearly 

 parallel until the fiuil)riae begin. The disc is pyriform and 

 only moderately large. 



