47 



always has them much further apart. Kiitresis is similar to Oh/ras, 

 but Atheais begins to show a greater divergence, and the cell in both 

 sexes shows a general lengthening. After Atheai!, the genus 

 that used to go under the name of Mcthona, but which now 

 according to Haensch (who follows Kirby) should be called 

 T/ii/rulia, is placed. This seems to me to be wholly wrong, 

 for in the similarity of male to female this genus much more 

 approaches Olj/ras and Hiiiresis. The neuration of the male is 

 scarcely different from that of the female except that vein 8 in the 

 male is more arched, rather reminding one of the position of vein 8 

 in the males of the genus Ithomia. The genus Aprotopos is separated 

 from T/ii/ridia by the position of vein 8, which in the male runs 

 out to the outer margin, while in the female it abruptly runs to the 

 costa at end of cell, and also by the excessive abortiveness of the 

 forelegs of the male. The genera Melinaa and Meclianitis, although 

 close, show a number of points of structural differences. In the 

 male of Meluu/a the veins nearly all run parallel from oft" the cell, 

 vein 7 is from the upper discocellular, and vein 8, after diverging 

 slightly at base, curves round parallel with the cell and vein 7 to 

 the margin. The tarsal joints of the foreleg also are aborted, but not 

 reduced to a thickened knob, as in MerluDiiti^. In the female the only 

 difference in neuration is that vein 8 is short, and does not extend 

 beyond the cell, curving out to the costa. The foreleg is weak, but 

 normal, with a several-clawed tarsus. In ^It'chanitis, which in the 

 female is sometimes extremely similar in outline and coloration to 

 female Melinaa, the species are, at a glance, separated by the 

 short antennie, but there are many other structural differences. 

 Vein 7 is given off before the end of the cell, and vein 8 runs close 

 to the cell. The cell is not nearly so angled at the discocellular 

 (not separately as in the female) and vein 8 is very short, being 

 given off' at the middle of the cell and running only slightly obliquely 

 to the costa. The tarsus is nearly normal, but weak, and has no 

 claws. This character of the clawed female tarsus in Melimra and 

 a few other genera show further affinity with the Danaines, for it is. 

 found not only in the true Danaix but in Li/corca as well. 



As it would be quite beyond the scope of a short paper to enter 

 into the details of neuration of all the genera, I will only further 

 make some observations on the genera Leiicot/ij/ris and Heterosis, 

 the former representing one of the least specialised of the gfenera 

 of transparent species, and the latter the most specialized. In 

 Leucotlnjih there is comparatively little difference, neurationall}', 

 in the sexes, but the genus, as at present constituted, is very 

 variable structurally, and although Godman and Salvin separated 

 Hyposcada from Leucot/iijria by the shorter cell of the hindwing, . 

 it is practically impossible to say with certainty whether a 

 species belongs to the one or the other, owing to a complete 

 transition of forms. In typical Leucotlnjiis male the cell of the 

 hindwing is shaped as in the majority of the genera that contain. 



