5Q Mr. A. G. Butler on the 



Mazacyla, Walker. 



96. Mazacyla abydas. 



Noctua abydas, Herrich-Schaffer, Auss. Schmett. 

 App. fig. 5Q>5 (1869). 

 Sepatiny, Rio Pnrus, 29th September; Pariti, 5th 

 October; Pupunha, Rio Jurua, 5th and 6th November; 

 Pupunhazinho, 8th Novembei-, 1874; Boaventura, Rio 

 Jutahi, 1st February; Barreira branca, 3rd February, 

 1875. 



Mazacyla fusifera is synonymous with Focilla relata. 



AzATHA, Walker. 



97. Azatha marcelHna. 



PhalcBna {Noctua) marcelUna, Cramer, Pap. Exot. 

 iv. p. 48, pi. 312, fig. F (1782). 

 Rio Purus, 23rd September, 1874. 



Not previously in the Museum, but closely allied to 

 A. retardens. 



Tautobriga, Walker. 



98. Tautobriga euspila. 



Tautobriga euspila, Walker, Char. Undescr. Lep. 

 p. 56, n. 93 (1869). 



Amphigonia (?) erythropus, Felder, Reise der Nov. 

 Lep. iv. ph 118, fig. 25 (1875). 

 $ . Manaos, 1 3th June, 1874. 



The type is a somewhat worn female, without antennfe, 

 from Limas. The genus is, in my opinion, intermediate 

 in character between Focilla and Milyas; but I must 

 admit that I regai'd the FocillidcB and AmphigoniidcB as 

 too closely related for separation ; the only structural 

 difference pointed out by M. Guenee is a slight modifi- 

 cation of the palpi, scarcely sufficient in some instances 

 to separate the species generically : no other difference 

 of the slightest value is indicated. 



Focilla Guerini, Guenee, is closely allied to Amphi- 

 gonia costalis, Walker. Both species would be better 

 placed in Azatha; as also probably Focilla Ghiliani 

 (which, however, I have not seen). Amphigonia ? rudis 

 of Walker is a Nedusia ( Geometrites). 



