LEPIDOPTERA. X35 



natum. Oculi mediocres, nudi. Thorax dLi\a.t\ov; antice et ad latera crista subarcuata, ex pilis 

 erectis sericeis ornatus. (^Abdomen elongatum, gracile, in maribus sex-articulatum, articulo 

 ultimo duobus uncis approximantibus ; valvis latis, incrassatis, truncatis, aduncis. Swains.) Alee 

 lai-o'ae; anticae oblongae, obtusse, margine costali thoi-acem versus fortiter arcuato; posticse latas, 

 rotundatse, sulco abdomen excipiendo pallescente : areola discoidali singularum clausa. Pedes 

 o-raciles, elongati: anticiin ulroque sexu conformes ; tarsi singulorum quinque-articulati ; articulo 

 basilari elongate, reliquis subsequalibus, ultimo unguibus duobus minimis, bifidis et pulvillo 

 intermedio instructo. 



This o-enus was first established with great judgment by Mr. Swainson, in the fourth number of his 

 Zoological Illustrations ; and I am very happy to be enabled to add to the character there limited from the 

 perfect insect, a complete representation of the metamorphosis of Terias Hecabe, the species which is adduced 

 as the type of the genus, and to illustrate it by a careful dissection. See Plate iv. fig. 8 ; 8, a ; 8, b ; 8, c ; 

 8 d ; 8, e ; 8, f. It is here placed between Colias and Pontia ; and an inspection of the plate will show that 

 this is its natural situation. Terias resembles Colias in the form of the chrysalis and in several properties of 

 the perfect insect, particularly the structure of the palpi, and the form and painting of the wings ; the larva, 

 on the contrary, and the antennae, have a much nearer relation to Pontia. I must however state, that these 

 remarks apply exclusively to the Oriental group of which T. Hecabe is the type : the American species I 

 am unacquainted with, and they appear to possess some peculiarities. Of the genus Terias as above defined, 

 we have five species from Java: they greatly resemble each other in colour, painting, and external character, 

 but I trust the following details will sufficiently elucidate their specific peculiarities. 



60. Tebias Hecabe. AIcb supra Missimi Jlavce, Umbo communi postico nigro, in anticis lato 

 costam versus arcuato attenuato, juxta marginem interiorem transversira d^finito, in area mediana 

 sinu recto profunda exciso ; in posticis angustiore margini prorsus parallelo, intus denticulato ; 

 fimbria communi flavescente : subtits flava ; singulis notd discoidali fused annulato-ovatd 

 irregulari subgemiiid ; anticce insuper ad basin notis duabus minutis, exteriore subangulari ; 

 posticcB notis minutis tribus subannulatis basilaribus fuscis, fascidque arcuatd marginali lati 

 interruptd ex notis subfiexuosis confiatd : foemina fascia anticarum accessorid insigni dimi- 

 diatd apicali violaceo-fuscd a mare manifest^ discrepat. (Exp. alar. une. 1^ — 2.) 



Wings above brigbt yellow, with a common posterior border of a black colour, which is very 

 broad in the fore-wings, passes in an arch towards the middle of the costa, is abruptly 

 transverse near the interior margin, the middle being deeply excavated in the direction of 

 the nervures and marked with a medial tooth, pointing towards the disk ; in the hinder- 

 wino's the border is narrow, parallel with the margin and denticulated at its inner edge ; 

 all the wings are confined by a common extreme yellowish marginal thread : underneath 

 yeWovf, each pair on the disk with a brown annular-ovate irregular mark, transversely 

 divided in the middle; fore-wings bearing besides, near the base, two minute marks, of 

 which the exterior is angular, hinder-wings with several brown delicate sub-annular cha- 

 racters at the base, and a very obsolete series of widely interrupted clouded or sub-flexuose 

 spots passing at a small distance from the posterior margin in an irregular arch across the 

 disk. 



Plate I. fig. 12. (The female). Plate IV. fig. 8 ; 8, a. The larva and chrysalis. 



Papilio 



