8 Grote and Robinson's Lepidoptcrohgical 



and apparently simple synonyms of Adelocejohala bicolor, as already 

 stated by Mr. Grote; tbeir description by Mr. Walsb as distinct species, 

 is attributable to an error of observation. 



DATANA, Walker. 

 Tbe species belonging to this genus have hitherto been insufficiently 

 separated. They will be found here described and figured and 

 descriptions of the mature larva, from alcoholic specimens, given of 

 each species, with the exceptions of Datana major, sp. nov. and 

 Datana jierspicua G. & R. We have had before us, from different 

 localities, about one hundred specimens, all of which we have been 

 able to refer to one or another of the four species : Datana angusii, sp. 

 nov. Datana ministra Walker, (Drury sp.,) Datana integcrrima, 

 sp. nov., and Datana, contractu Walk. 



The characters which are held in common by the species of Datana, 

 are, in part, as follows : The scales which clothe the head and which 

 form a thoracic patch extending over the prothorax above, on the cen- 

 tral disc and over the base of the tegulaa, are dark and intense in 

 coloration, deepening to the raised edges on the thoracic parts. Five 

 transverse lines cross the anterior wings from costa to internal 

 margin. Of these the fourth is least conspicuous and contiguous to 

 the fifth. Uusually, in the males, the under surface of the wings is 

 crossed by a dark shade band. The fore femora, tibia? and tarsi are 

 darker colored than the rest. It is difficult to attach specific value to 

 the course of the transverse lines, since it is exposed to considerable 

 variation in the same species. Briefly, the distinctions between the 

 species, all of which are of different shades of yellow or reddish 

 brown, are these: In D. angusii, D. ministra, and D. major, the ex- 

 ternal margin is excavate between the nervules. This character 

 excludes D. integerrima, D. contracta and D. pcrspicua from present 

 consideration. The general deep brown color, which has something 

 of a blackish-purple tinge, will at once separate D. angusii from its 

 associates. D. ministra and D. major are nearly related, the latter 

 may be distinguished by its larger size, the more tawny general 

 coloration, the less prominently excavate external margin of the 

 anterior wings, while the secondaries are, in the specimen we have 

 before us, uncrossed by any pale shade. Drury's and Harris' figures 

 represent most decidedly the species we describe as Datana ministra, 

 The moderate size, excavate primaries and intense reddish-brown 

 coloration are distinguishing characters. 



The three species belonging to the second section of the genus are 



