Explanation of Plate XV. 



Diagrams (from camera sketches) of tegumina of certain 

 Stenoptilias x 80. 



Fig. 1. Fuscus. 



2. Bijnmctidactylus. 



3. Zophoddctylus. 

 4 and 5. Coprodacti/lus. 



6. Graphodadyhis (pneumonanthes). 



7. Grandis. 



The terminal lobes of coprodactylus have a variable, irregular 

 membrane extending beyond the scaled portion. 



Crraphoddcttihis {pntumonanthes) has the terminal lobes rounded 

 with well-marked sulcus. Grandis resembles it closely in this 

 respect. 



The uncus also is much alike in these two species, being thick 

 tapering regularly, the basal half with complicated fold and with 

 sensory hairs nearly throughout, contrasting with coprodadylus, in 

 which the uncus is more slender, with widened conical base, and 

 hardly any sensory hairs on the slender terminal portion. 



