TERIAS. 161 



have a broader black outer margin, and have a tinge of orange towards the costal area. 

 The females of the two species are very much alike, but may, we believe, be distin- 

 guished by the greater prominence of the marginal angle of the secondaries. 



With the types of T. fabiola before us, and authentic specimens of T. gaugamela, we 

 are unable to trace any practical difference between them. The females correspond 

 very closely. The male of T. fabiola has the outer black border of the secondaries 

 very narrow ; but this, as is well known, is a very variable character. 



Regarding T. jamapa of Reakirt we have some doubts whether the description was 

 based upon a female of this species or upon one of T. xanthochlora ; but as he says that 

 the outer margin of the secondaries is prolonged into a longish pointed lobe, we are 

 inclined to think that the name should be referred to T. fabiola. 



Ecuador is the most southern point whence this species has been recorded. 



9. Terias xanthochlora. (Tab. LXIII. figg. 5, 6 <s , 7, 8 $ .) 



Terias xanthochlora, Koll. Denkschr. Ak. Wiss. Wien, i. p. 363 l . 

 Terias constantia, Feld. Reise d. Nov., Lep. p. 200 2 . 

 Sphanogona constantia, Butl. & Druce, P. Z. S. 1874, p. 359 3 . 



S alis sulphureo-flavis, anticis apice et margine externo (angulum analem versus angustiore) nigro-fuscis, 

 introrsum sinuatis ; posticis vix angulatis, angustissime fuseo limbatis : subtus pallide flavis, posticis 

 maculis et squamis ferrugineis sparsim notatis. 



2 mari similis, sed colore fuseo anticarum vix ad angulum analem extendente, posticis margine externo fusco 

 absente (interdum ad apicem fusco vix tinctis) ; subtus apicibus rosaceo tinctis. 



Hab. Mexico {Salle 2 , Boucard), Fortin, Teapa (H. H. Smith), Cordova (Mmeli); 

 Guatemala, San Geronimo, Central valleys (F. D. G. 8f 0. S.) ; Nicaeagua, Chontales 

 (Belt, Janson) ; Costa Rica (Fndres, Van Patten 3 ), Cache (Sogers) ; Panama, Chiriqui 

 (ArcS, Bibbe), Volcan de Chiriqui (Champion). — Colombia 1 2 to Peku. 



We use this name for a form in which the secondaries have a very slight marginal 

 angle and a very narrow or obsolete black border, and have both wings of a uniform 

 primrose-yellow, without any wash of orange towards the costa of the secondaries. 



In these points T. xanthochlora differs from T. fabiola, the only other species in our 

 country with which it is likely to be confused. Kollar's original description was 

 based upon a Colombian specimen, of which we have an accurate drawing, and we 

 have examples in our collection which exactly correspond. The typical form has no 

 black border to the secondaries, but between this and a fairly definite border we find 

 every gradation in the series before us. Specimens thus bordered agree with typical 

 T. constantia of Felder, the range of which, according to him, extends from Venezuela 

 to Mexico; therefore we see no tangible grounds for separating T. constantia from 

 T. xanthochlora. 



Mr. H. H. Smith found a number of pupae of this insect attached thickly to the 

 stems of a species of convolvulus at Teapa, from which he reared a series of specimens 



biol. centb.-amee., Rhopal., Vol. II., November 1889. y 



