in the Basin of the Amazons. 243 



third stalked, from the end ; radial from the disco-cellular, a little 

 distance above the end. 



Allied to Physula, Gn., but distinguished by the tufted 

 anteniife of the ^ , and the peculiar clothing of the 

 under side of the fore wings. 



23. Physulodcs eiipithecialis. 



Physula eiipithecialis, Gn., Delt. & Pyr., 87, 110 ; 

 Wlk., Cat. Lep. Het. B. M., xvi., p. 141. 



Fore wing sandy ochreous dusted with brown, especially along 

 the costa and towards the hind margin ; two fine dark but in- 

 distinct transverse lines, one before and one beyond the middle, the 

 latter wavy ; orbicular stigma hardly visible ; reniform consisting 

 of two spots ; a submargiual row of distinct black spots ; fringes 

 concolorous, with a line of darker scales down their middle. Hind 

 wing more thickly dusted with darker, with an indistinct inter- 

 rupted darker central band, and a paler one towards the hind 

 margin ; the row of submarginal dots as in the fore wing. Under 

 side straw-colour dusted with brownish ; the submarginal row of 

 dark spots very plain ; fore wing with the disc and the base of the 

 costa more or less overrun with very fine powdery-looking hairs. 

 Head, palpi, thorax, and abdomen ochreous, dotted with brown 

 atoms. 



One <? . Pupunha, E. Jurua, Nov. 1st, 1874. 



There is no example of this insect in the British 

 Museum collection, but it agrees well with Guenee's 

 description. Differing as it does in the structure of the 

 (? antennae from the other two species of Physula, Gn., 

 I have placed it in a genus by itself. 



24. Megatomis hidentalis, n. s. 

 Fore wing fuscous, with a purplish reflection in certain lights, 

 dusted all over with ochreous atoms ; the lines and stigmata also 

 ochreous; first line near the base indistinct, curved, edged with 

 darker ; second line beyond the middle straight, oblique, suddenly 

 reflexed just before reaching the costa ; it is edged internally with 

 dark ; submarginal line indistinct, ochreous, zigzag, forming two 

 prominent angulations ; orbicular stigma small, oblique, reniform 

 stigma lunultir, both with ochreous centres and dark margins ; 

 marginal lunules black ; fringe fuscous, with a narrow ochreous 

 basal line. Hind wing fuscous, dusted with ochreous over the 

 inner half; the costal half plain ; the second straight line and the 



