M. A. Chevrolat — Reflexions et Notes synonymiques. 245 



hind wing, however, all three differ from the rest of the genus in the 

 upper radial being emitted as a branch of the subcostal after the cell, 

 and not connected with the cell by means of an upper disco-cellular. 

 T. Brephos is common in thinned parts of the forest throughout the 

 country, hovering slowly over the carpet of Lycopodia which covers 

 the ground in those localities. 



Note. — The species of Terias are a most difficult study, and it is 

 with some hesitation that I have described several as new. Their 

 specific characters are not at all trenchant ; the peculiar markings 

 which may serve to distinguish well-characterized examples of a 

 species are subject to become obsolete in other examples ; the species, 

 again, present many local varieties in different parts of their area 

 of distribution. The genus is found in the tropical and subtropical 

 zones of both hemispheres, including Australia, Madagascar, and other 

 African Islands ; eighty-six species having already been described. 

 Although insects of feeble flight, they fly directly onwards like most 

 of the Pierinae ; and this, together with the food-plants of the larvae 

 (Legiiminosae) being of general occurrence, may account for the sin- 

 gular fact of the very wide distribution of many of the species as 

 well as of the genus. Several species allied to T. Hecabe, found in 

 the island of St. Domingo, are not distinguishable from similar forms 

 occurring in the Malay Archipelago. In describing the new Ama- 

 zonian species I have only selected those which were illustrated 

 by many examples, or were strikingly distinct, and have abstained 

 from uselessly adding to the number of obscurely known forms by 

 including many others in my collection which do not accord with 

 any already described. 



XX. — Reflexions et Notes synonymiques sur le Travail cle M. James 

 Thomson sur les Ceramby cities, avec descriptions cle quelques nou- 

 velles especes. Par M. A. Chevroiat. 



[Second et dernier article.] 

 J'ai visite dernierement la collection de Cerambycides (Longicornes, 

 Latr.) de M. Thomson an point de vue du systeme qu'il a adopte. 

 Je dirai tout d'abord que cet Entomologiste ayant, depuis mon l ei " 

 ai'ticle, acquis beaucoup de choses nouvelles dans cette famille, rec- 

 tifie des erreurs et rappele a leur place certains genres omis, cette 

 classification ge'nerale me parait rationnelle, heureuse meme et devoir 

 meriter des eloges, mais l'ouvrage dans le desordre ou il est pubhe' 

 avec les intercalations successives manque d'homogeneite. 



En outre, la base, qui devait ctre la determination rigoureuse des 



