1909.] Records of the Indian Museum. 455 



in the text, Macquart says the venation is similar to that of his 

 Exoprosopa tricolor, of which is also figured a wing, and this 

 latter is undoubtedly an Exoprosopa. Pending a definite settle- 

 ment I have withdrawn the species from my list, presuming it 

 to be North American and (incidentally) an Exoprosopa. 



Notes on the genus ANTHRAX. 



The twenty- two species admitted here as belonging to Anthrax 

 proper are, I believe, all correctl}^ placed here. Mr. Austen kindly 

 informs me after examinations of the types, that satellitia, con- 

 grua and refer ens belong here ; afra, hottentotta and paniscus 

 are well-known Palsearctic species ; duvaucelii , clara, antecedens , 

 alboftdva, leucopyga, aperta and manifesta have all been identified 

 by me (I think, correctly; with specimens in the Indian Museum, 

 Pusa or my own collection, the last two species being confirmed 

 by Mr. Howlett's comparison of them with the types. Of the 

 remainder, a good plate is available of leucostigma (terminalis), 

 whilst satelliiia is recognisable by the basal two-thirds of the wing 

 being blackish , the outline of the colour denticulate, the clear part 

 containing four spots ; to these being added only one new one, 

 clausa. 



The rest of the species I have retained in Anthrax by their 

 association by authors with groups of species belonging wholly 

 or mainly to this genus, and I believe they will all be found correctly 

 placed here. 



These are absalon, W., troglodyta, F., fulvula, W., dia^W., 

 limpida, Wlk,, and lucida, Wlk. 



As regards the grouping of the species, presuming them all 

 to be true species of Anthrax, the difficulty is probably greatest 

 of all in this genus. For my own convenience in studying them 

 I have arbitrarily arranged them in "groups," but these may 

 have no scientific value, based as they are on the wing-markings, 

 simply because this character is the one never overlooked by any 

 of the authors, and again, because it is the most lasting character. 

 These " groups " are (i) wings nearlj' wholly black, leucostigma 

 and satellitia] (2) wings with the usual oblique, dark, generally clear- 

 cut baso-costal band, afra to congrua ; (3) wing clear, with some 

 slight suffusions on certain veins, duvaucelii ; (4) wing excessively 

 limpid, with a silvery shining shoulder-spot, troglodyta, but the 

 silvery spot occurs in some other species with non-limpid wings ; 

 (5) wing practically clear, but always with a more or less narrow 

 (and generally ill-defined) anterior j'ellowish or pale brownish 

 margin, hottentotta to lucida inclusive ; (6) wings absolutely clear 

 and unmarked, leucopyga to clausa, the latter being easily known 

 by its closed anal cell. 



It is, of course, difficult to draw satisfactory dividing lines 

 between some of these groups, as they are inclined to merge one 

 in the other, and the discovery of additional species will make 

 the separation of species on these grounds still more difficult. I 



