48 



the larger coloured species ; the upper discocellular is produced 

 towards the costa. Vein 5 is in quite a distinctive position, and is 

 a long way above the middle discocellular. Vein 8, after diverging 

 from the cell, returns and runs close to vein 7. In the female the 

 cell is slightly shorter, .and vein 8, instead of diverging at the com- 

 mencement, follows the curve of the cell from the start ; but the 

 difference is small for Ithomiines. Although the species vary con- 

 siderably in shape from rather long narrow wings to much broader 

 and shorter wings, a longer or a shorter cell can occur in either. 

 Of the genus Heteiosais. which contains but few species, and with 

 which I will conclude, there is a curious development. Vein 6 is 

 entirely absent. It is very weak in Psemhscada and Ihijiolcria, but 

 in addition, in Heteromis the cell is open at the upper discocellular 

 in the male. This is a very special development, for when the cell 

 is open, as in the Nyniphalidu, it is the lower discocellular that is 

 absent. In the genus Fseicloscada, some species have the cell just 

 open in some specimens by the middle discocellular not being 

 united with the lower. This is to be seen in P.s. exoruata. In the 

 female Heterosai^ the cell is closed, and there is strong similarity to 

 female PssKdoscaila, except that vein 6 is absent, while intbe latter, 

 veins 6 and 7 are usually on a stalk of varying length, but occa- 

 sionally as in Ps. iitilla from different origins like lletemsais. 



Gentlemen, I crave your indulgence for my many shortcomings 

 in this paper. To write a short paper on a big subject as in this 

 case, has been more difficult than writing a long paper on one small 

 matter of detail. The ItJtomiina have been, and are, largely 

 neglected by students of Exotic Lepidoptera, and one hears as the 

 reason that they are less beautiful than other groups and more 

 difficult. The first answer I will ask you to dismiss from your 

 minds, for it cannot be a well-considered statement by any who 

 make it. As for the latter — the one of difficulty — there is certainly 

 more truth in it, but it is not nearly so great as is often averred, and 

 what difficulty there is should stimulate us to fresh endeavours to 

 overcome it. 



