■4. cnntocTLLA. 349 



colours of the Lipaugince are, as their name indicates, dull and 

 unattractive, but the newly discovered Lathria streptoplwra is a 

 brilliant exception to this rule. The area of distribution of the 

 Lipaugince extends from Southern Mexico to Bolivia and South 

 Brazil. 



Key to the Genera. 



A. Primaries of male abnormally reduced .... 4. Chtrocylla, p. 349. 



B. Primaries normal. 



a. Back of tarsus smooth ; rictus feebly bristled. 



«'. External toes united at the base 5. Lathria, p. 350. 



b'. External toes united to the end of the 



second phalanx 6. Auxia, p. 354. 



b. Back of tarsus rough ; rictus much bristled ; 



tarsi more feeble, and external toes united 



at the base only 7. Lipaugus, p. 356. 



4. CHIROCYLLA. 



Type. 

 Chirocylla, Scl. et Salv. P. Z. S. 1876, p. 357 C. uropygialis. 



9 8 



Wing-end of Chirocylla from beneath. (P. Z. S. 1876. p. 356.) 



The very singular structure of the reduced and twisted primaries 



