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



costal border black, with two yellow dots and a metallic 

 plumbaginous spot : secondaries with a broad, irregular, pale 

 yellow patch from the origin of the subcostal branches to the 

 submedian vein ; basal area of a rather paler brown than the 

 external area ; head and collar black, spotted with yellow ; 

 abdomen black, banded with dull orange. Primaries below 

 with the base bright ocbreous, otherwise as above : secon- 

 daries with the basi-abdominal area occupied by a broad sub- 

 quadrate pale yellow patch, washed at base with ochreous ; 

 three submarginal white dots : body below dull ochraceous. 

 Expanse of wings 2 inches 2 lines. 



In coloration this species is not unlike Rothia Westwoodii 

 [Eusemia virguncula?, Mab.) ; but the form is quite different. 



29. Eusemia tranquilla, sp. n. 



Allied to the preceding species, but darker, the belt of 

 primaries of double the width and less oblique : secondaries 

 with the base purplish black ; a broad patch of pale green 

 sprinkled along its inner , margin, with orange scales which 

 form a distinct spot upon it just within the extremity of the 

 discoiclal cell : the body less distinctly banded. Primaries 

 below with the band even wider than above, the base bright 

 orange : secondaries bright orange, with the outer two thirds 

 of costal border, the apex, and external border deep brown. 

 Body ochreous, venter banded with black. Expanse of wings 

 2 inches 1 line. 



This is of the same form as E. metagrius. 



(Zygasnoid) Arctiidse. 



Mydrodoxa, gen. nov. 



Body and legs very robust, wings broad. Primaries with 

 straight costal and convex inner margin, outer margin slightly 

 convex ; costal vein extending to second third of costa ; sub- 

 costal six-branched, first branch emitted before the end of the 

 cell, united by a cross spur with the second, which is emitted 

 from the end of the cell, and from below which the remaining 

 four are thrown off; the sixth branch is in reality the upper 

 radial ; upper discocellular strongly angulated, lower ex- 

 tremely short, so that the lower radial almost looks like a 

 fourth median branch. Secondaries subtriangular; neuration 

 normal — that is, the costal vein extending to apex, the sub- 

 costal two-branched (although the branches are emitted from 

 a short footstalk), discocellular angulated, median three- 

 branched, submedian and internal veins as usual. Type 

 M. sjplendens. 



