130 MR. A. G. BUTLER ON [Feb. 16, 



on one side is concealed and on the other broken, the latter is of the 

 same sex ; it has the last joint of the palpi much more slender and 

 of nearly twice the length of that of D. fenestrina. 



When it is proved beyond question, by carefnl breeding, that 

 dissimilar forms are varieties of one and the same species, the sooner 

 they are put together the better ; but this guesswork, especially 

 when concealed under the guise of an authoritative declaration, is a 

 positive hindrance to the acquirement of accurate knowledge. In 

 many cases where Mr. Meyrick has stated his conviction that a long 

 series of described forms belong to one variable species, he has been 

 subsequently obliged to alter his opinion ; surely he cannot claim 

 that his first action advanced science, since he must know of a truth 

 that it only retarded it. 



DURDARA ROBUSTA. 



Durdara robusta, Warren, in Hit. 



The type of Mr. Warren's unpublished description is from Sarawak ; 

 it is just possible that Walker may have described it as an Anisodes 

 or a Capnodes in his Supplement, or in one of the papers published 

 in the Linnean Journal; but I cannot venture to attempt its identi- 

 fication. 



Pharambaba vinosa, n. sp. (Plate VI. fig. 8.) 



Pale vinous-brown ; wings reticulated with darker brown : pri- 

 maries crossed by six imperfect darker bands, the outer edges of 

 which, and the inner edge of tlie third one, are defined by blackish 

 lines ; the fourth and fifth lines are inarched towards the costa ; the 

 sixth, which is submargiual, is abbreviated and cuts off the apical 

 half of the external border ; on the secondaries there are about three 

 black-edged, ill-defined, abbreviated bands from the costa, the central 

 one is acutely elbowed and bounded oa each side near the centre of 

 the wing by a iiyaliue, subquadrate, white spot ; on the under surface 

 all the markings are more sharply defined, and on the primaries is a 

 subcostal, basal, shining, pearly tuft covering the base of the frenulum. 

 Expanse of wings 26 millim. 



A single male example. 



The species does not appear to be very closely allied to any 

 named form. 



UrAPTERYGIDjE. 



Syngonorthus, n. gen. 



Allied to Gonorthus : of the same form and with similar ueuration ; 

 but the male antennae much shorter and with very short fine ciliations 

 instead of being strongly pectinated. 



Syngonorthus subpunctatus, n. sp. (Plate VI. fig. 9.) 



Pale creamy stramineous, slightly sericeous ; the wings irrorated 

 with greyish argillaceous ; the primaries crossed by two nearly 

 parallel, straight, transverse stripes of the same colour ; outer margin 

 and fringe forming a third stripe rather more ferruginous in tint ; 



