382 MR. A. G. BUTLER ON NEW LEPIDOPTERA. [Apr. 2, 



veins towards the base yellow; head, collar, and thorax purplish 

 black, tawny or ochraceous at the sides ; abdomen fuliginous brown, 

 ochraceous at the sides; wings below more clearly denned than 

 above, the costal borders alternately black and yellow ; palpi and 

 legs black and yellow ; venter yellowish. Expanse, <J 1 inch 3 

 lines, 2 1 inch 2 lines. tfjPara; $, Venezuela (Dyson). 



The species of this genus are marvellous mimics of the Coleopte- 

 rous genus Calopteron. 



Alpenus, Walker. 



3. Alpenus purus, n. sp. 



Wings snow-white ; primaries with one black dot at base, one 

 near the base of the median vein, two before the middle of costal 

 margin, three in a triangle on interno-median interspace, and five 

 in a curved series beyond the middle ; secondaries with a spot at 

 the end of the cell, one near the outer margin, and two near the 

 anal angle ; thorax snow-white, with a black dorsal line ; collar and 

 tegulse spotted with blank ; abdomen ochreous, with a dorsal series 

 of black spots, anus and ventral surface cream-coloured : primaries 

 below without spots. Expanse 1 inch 7 lines. Abyssinia. 



This species much resembles Spilosoma menthastri, but with the 

 smooth black-spotted thorax of Alpenus. 



Teracotona, n. gen. 



Allied ,to Phragmatobia, but with longer and narrower primaries, 

 the last subcostal branch with a siugle instead of a double furca ; 

 discocellulars distinctly angulated ; secondaries more acuminate at 

 apex ; subcostal branches emitted from a very short footstalk ; dis- 

 cocellulars more transverse, less distinctly angulated ; radial emitted 

 further from the third median branch ; body much less woolly. 

 Type, Aloa rhodophcca of Walker. 



4. Teracotona roseata, n. sp. 



Primaries above reddish testaceous speckled with brown ; a black 

 discocellular spot and a subcostal spot near apex ; secondaries rose- 

 red, brightest . on the abdominal area ; a large black discocellular 

 spot ; thorax grey ; head, front of collar, and inner edge of tegulse 

 brownish buff; a black spot on each shoulder, and one on each 

 tegula ; abdomen black, rosy at the base, a dorsal stripe, the pos- 

 terior margins of the segments and the anus ochreous : wings below 

 rosy, with black discocellular spots ; borders testaceous, speckled 

 with pale brown ; primaries with an irregular transverse dusky discal 

 belt ; body below whity-brown ; anterior femora above carmine, 

 knees black, tarsi banded with black ; venter ochreous at the sides, 

 with two lateral series of black spots. Expanse 2 inches 2 lines. 



Natal (Gueinsius). 



Allied to T. submacula (Spilosoma submacula, Wlk., = Spilosoma 

 obscurum, Wlk.), but with longer wings, and differently coloured. 



