24 Mr. A. G. Butler on the 



pata, Rio Negro, 29th December, 1874; 9 Rio Jutalii, 

 25th January, 1875. 



10. Cel^ena dentilineata, n. sp. 



Coloration of the preceding, but the line across the 

 basal third of primaries very indistinct, the line limiting 

 the central band externally distinctly denticulate-sinuate ; 

 the upper half of the reniform spot, and sometimes the 

 whole of it, testaceous or dull red; the line beyond the 

 central band very indistinct ; the fringe much longer ; 

 secondaries darker, frequently suffused Avith greyish, with 

 the whole outer border greyish-brown ; fringe white or 

 whitish and longer; primaries below sericeous grey with 

 grey-speckled whitish costal and external borders and 

 reniform spot ; a dusky costal crescent beyond the middle ; 

 a marginal series of black dots; secondaries sordid white 

 with grey-speckled costal and external borders, apical half 

 of fringe streaked and sjieckled with grey ; a minute dusky 

 discocellular dot and abbreviated discal line ; body white : 

 venter with three or four central blackish dots: expanse 

 of wings 11 to 13^ lines. 



Rio Madeira, 18th May; Itatoro, Rio Madeira, 2nd 

 June; Vista linda, Rio Purus, 8th October; Tanaria, 

 9th October; Paricatuba, 10th October; Rio Jurua, 7th 

 November; San Antonio, Rio Javary, 16th December, 

 1874. 



Allied to C. iejjens. 



Perigea, Guenee. 



11. Perigea otiosa. 



Perigea otiosa, Walker, Lep. Het. xv. p. 1693 

 (1858). 

 Fazenda, near the Rapids, Rio Tapajos, 14th March, 

 1874. 



var. P. paupera, Walker, 1. c. 

 Rio Madeira, 14th and 27th May; Manaos, 26th and 

 29th August; Fonteboa, Rio Solimoes, 17tli November; 

 Rio Javary, 3rd December, 1874. 



var. ? P. imhella, Walker, p. 1692. 

 Sapucaia oroca, Rio Madeii-a, 15th May, 1874. 



If the latt-er be a modification of the preceding, it will 

 take priority. 



