390 Mr. A. G. Butler on Madagascar Lepidoptera. 



Ophiusidae. 



47. Ophiodes tirrhcea <3 . 



Phalcena Noctua Tirrhcea, Cramer, Pap. Exot. ii. p. 116, pi. 172, fig. E 

 (1779). 



The secondaries of the male are spotless. Unless all the 

 species of this type are to be regarded as varieties of one type, 

 the European form will have to be kept separate under the 

 name 0. vesta of Esper. 



Ennomidae. 

 48. Marcala ? modesta, sp. n. 



Dull clay-coloured, sericeous ; wings crossed from apex of 

 primaries to abdominal margin of secondaries by a straight 

 oblique brown line ; a black discocellular spot on all the wings, 

 as well as three more or less defined abbreviated series of 

 pearly-bordered black spots across the inner half of the disk ; 

 fringe reddish clay-coloured : body pale, the head, collar, and 

 front of thorax yellowish. Under surface pale buff, reddish 

 towards costse and outer margin of primaries, the internal 

 border of the same wings white ; oblique line less distinct 

 than above ; discocellular spots smaller. Expanse of wings 

 1 inch 2 lines. 



The known species of Marcala are Indian ; the genus is 

 allied to Drepanodes and Crocinis. 



Geometridae. 



49. Comibcena stibolepida. 

 Comibcena stibolepida, Butler, Cist. Ent. ii. p. 394 (1879). 



The example now received measures 2 lines more than the 

 type in expanse of wings. 



50. Thalera Cowani, sp. n. 



Wings above sap-green, with chocolate-brown discocellular 

 dots and outer margin ; a dentate-sinuate dark sap-green dis- 

 cal line, oblique in primaries, angulated irregularly in secon- 

 daries ; fringe snow-white ; primaries with the costal margin 

 brown : thorax greenish ; head and base of antennas snow- 

 white, pectinations of antennas yellowish, the greater part of 

 the main stem ferruginous. Under surface pale creamy 

 yellow ; wings with laky-brown outer margin and white 

 fringe ; primaries with the costal area washed with reddish, 

 costal margin brown ; femora and tibia? reddish in front. Ex- 

 panse of wings 1 inch 3 lines. 



