88 Mr. R. M'Lachlan on Cahj)terygina 



The reticulation of tlie wings is more dense tlian in 

 other species of Enthore. 



Thore. 



Of this genus I have received from Ecuador a large 

 number of examples of the gigantea group that are ex- 

 tremely puzzling. It is evident that. much local variation 

 exists, yet at the same time I do not think it possible 

 to decide as to which are species or which only varieties, 

 without strict local observations of their habits, for if 

 it be found that the most strikino- forms occur together 

 in the same locality, and yet keep separate inter se, that 

 evidence will go far to prove we are dealing with species 

 and not merely varieties. 



Thore gigoMtea, Selys. 



In three $ now in my collection the dark terminal 

 portion of the wings commences at the nodus, but there 

 is a somewhat triangular median internal prolongation 

 towards the base, thus extending w^ithin the nodus. 



Thore procera, Selys (race of gigantea, according 

 to Selys). 



In his " Troisiemes Additions," p. 34, De Selys enume- 

 rates several forms from Ecuador, obtained by me from a 

 former collection made by Air. Buckley. I have since 

 received many additional examples. The forms are 

 alluded to as Nos. 1 to 4, and I propose to make some 

 remarks upon them consecutively. 



No. 1. — The dark portion of the wings in the $ , com- 

 mencing at from ten to twelve cellules after the nodus in 

 the examples seen by De Selys. In a longer series this 

 form shows modifications, inasmuch as the dark portion 

 varies in its point of commencement from the nodus itself 

 to about twelve cellules after it. Among these there ap- 

 pear to me to be two forms, differing in size and apparent 

 breadth of Aving. In the larger the length of the posterior 

 wings is from 40 to 45 mm., in the smaller from 35 to 

 38 mm., and the neuration in this smaller form a])pears 

 to be less dense as regards the small intermediate supple- 

 mentary sectors in the dark apical portion as seen in im- 

 mature examples. The female varies considerably in 

 the breadth of the dark band, and I am unable to 

 apply the examples of this sex to the larger and smaller 



