Linncean Society . 497 



Mr. Doubleday states, in the anterior wings of a large portion of the 

 Heterocera ; but the lowest or discoidal one is often wanting, though 

 its nervules remain : in the Rhopalocera it is always wanting, and its 

 nervules are united either to the subcostal or median nervures. 



Admitting the correctness of the above views, we have in the 

 Rhopalocera a median nervure with constantly three nervules, above 

 which are the two discoidal nervules, and then the subcostal nervure, 

 generally offering five nervules, but sometimes only three. Various 

 modifications in the number and connexion of these nervules are in- 

 dicated in different genera. 



The genus Argynnis, Godart, always offers five subcostal nervules, 

 never, as Mr. Doubleday believes, anastomosing with the costal ner- 

 vure. Removing from it three species, Arg. Alcandra, Aceste and 

 Lucina, and perhaps Arg. Metea, and adding to it some of the Ce- 

 thosia, it becomes a most natural group. Of the subdivisions pre- 

 viously made in it Mr. Doubleday takes a brief review, and then pro- 

 ceeds to point out the sections into which he proposes to divide it, 

 which are founded in a great degree on the position of the subcostal 

 nervules. 



The first of these is Agraulis properly so called ; the second com- 

 prehends Argynnis Thais, Clagia and their allies ; Arg. lole forms 

 the type of a third ; the fourth is formed by the genus Phalanta of 

 Dr. Horsfield, including some species not previously referred to it ; 

 the fifth has for its type Arg. Egesta ; the sixth includes the genus 

 Clothilda of M. Blanchard ; the seventh M. Boisduval's section Ma- 

 jores, with the addition of Lathonia and some other species ; the 

 eighth comprises his Minores, with the exception of one or two spe- 

 cies ; and the remaining species compose the genus Melitaa properly 

 so called. In all these sections Mr. Doubleday describes at length 

 the structure of the nervures and their nervules, and notices the 

 geographical distribution of the species. 



The paper was accompanied by a series of figures illustrative of 

 the neuration of the wings of various species. 



April 1. — E. Forster, Esq., V.P., in the Chair. 



Read " Observations on two Malayan species of Semnopithecus.** 

 By Theodore Cantor, M.D., Civil Surgeon, Prince of Wales's Island. 

 Communicated by T. Horsfield, M.D., V.P.L.S. 



The Semnopitheci which form the subject of Dr. Cantor's paper are 

 Semn. cristatus, Horsfield, and a new species which Dr. Cantor names 

 and characterizes as follows : — 



Semnopithecus halonifer, nitide cinereo-nigrescens, crista occipitis can^, 

 abdomine subalbido, cauda subcinerea, facie auribus manibus pedibus 

 tuberibusqiie ischiaticis nigris, palpebris labiisque lacteis veluti halo- 

 nibus circumdatis : tarsis palpebrarum nigris, phalangibus digitorum 

 primis membrana inter se junctis. 



Juvenis : Pallidior, crista occipitis cinere^, facie nigro-caerulescenti. 



Neonatus : nitide fulvus. 

 Ann. §■ Ma^. N. Hist. Vol. xv. SuppL 2 M 



