EXPLANATION OF PLATE F (Figs. 1-18). 
Figs. 1-5.— Telegonus midas, Cram. 
Fig. 1.—Natural size. Fore-wing with the costal fold opened out (P). 
Fig. 2.—Magnified 8 times. Costal fold opened out. M, marginal 
nervure; c, costal nervure. 
Fig. 8.—Magnified 25 times. Scales inserted along the line between 
the folded margin and the rest of the wing. 
Fig. 4.—Magnified 25 times. Scales from the area covered by the 
[free] margin of the costal fold. 
Fig. 5.—Articulated hairs, forming the source of the dark grey powder 
in the costal fold, magnified 180 times, a, detached particles ; b, jointed 
hairs ; c and d, imperfectly jointed hairs. 
Figs. 6-9.— Telegonus , sp. ?, from S. Bento. 
Fig. 6.—-Fore-wing with closed fold (P), natural size. 
Fig. 7.—Transverse section through the middle of the costal fold, 
magnified 25 times. M, marginal nervure; c, costal nervure; sc, sub¬ 
costal nervure. 
Fig. 8.—Detached joints of hairs from interior of the fold, magnified 
180 times. 
Fig. 9.—Articulated hair, magnified 180 times. 
Figs. 10, 11.— Telegonus mercatus, Fabr. 
Fig. 10.—Fore-wing, with the costal fold (P) closed, twice natural 
size. 1, submedian or internal nervure ; 2, 8, 4, first, second, and third 
branches of the median nervure; 5, second; 6, first branch of discoidal 
nervure; 7, 8, 9, 10, 11, fifth, fourth, third, second and first branches of 
the subcostal nervure ; 12, costal nervure. 
Fig. 11.—Scales from the interior of the fold, magnified 180 times. 
Figs. 12-18.— Hesperia syrichthus, Fabr. 
Fig. 12.—Fore-wing, magnified 3 times. P, costal fold. 
Fig. 13.—Transverse section across the costal fold, magnified 25 
times. M, marginal; s, costal; sc, subcostal nervures. 
Fig. 14.—Scales inserted along the marginal nervure, magnified 30 
times. 
Figs. 15-18 are magnified 180 times. 
Fig. 15.—Scales from the lower surface of the folded margin. 
Figs. 16, 17.—Scales from the area covered by the folded margin. 
Fig. 18.—Scales from the deepest part of the angle formed by the 
folded margin with the rest of the wing. 
