DEBTS. 



359 



Eyes prominent, especially in the males, hairy. 



Labial Paljn rather elongated, elevated obliquely as high as, or higher than, the level of the top of the eyes, 

 and porrected to a short distance in front of the face ; the long middle joint without any tuft on the back, 

 clothed in front with moderately short fine hairs, not forming a close mass; terminal joint very short and 

 slender. 



Antenna' not, or scarcely, half the length of the fore wings, very slender ; terminated by a slender gradually formed 

 club, composed of very short joints. 

 Thorax very short, thick, and hairy. 



Fo?-e Wings triangular-ovate. Fore margin strongly curved ; apical angle rounded. Apical margin straight, 

 or but little emarginate, about three fifths of the length of the anterior. Inner margin nearly straight, about 

 as long as the apical. Costal vein dilated at the base, extending rather beyond the middle of the costa. 

 Subcostal vein with its first and second branches ari.sing before the anterior extremity of the discoidal cell ; 

 the thii'd and fourth beyond it, about the same distance apart as between the origin of the second and third 

 branches, and of the fourth branch and the tip of the wing. Upper disco-cellular vein very minute, oblique ; 

 middle disco-cellular much longer, curved at the extremity, being directed rather outwards ; outer disco- 

 cellular longer than the middle one, nearly straight, also directed obliquely outwards, uniting with the third 

 brancli of the median vein at about the same distance from its origin as exists between the first and second 

 branches ; the third branch being considerably angulated at the point of junction, whereby the discoidal cell is 

 closed somewhat acutely rather beyond the middle of the wing. 



Hind Wings subovate, more or less scalloped along the outer margin, which is generally deeply angulated, or rather 

 shortly tailed at the extremity of the third branch of the median vein. Precostal vein curved, the tip directed 

 outwards. Costal vein extending to about two thirds of the length of the costa. First branch of the postcostal 

 vein arising at a moderate distance from its base, the extremity extending to the outer angle of the wing. 

 Upper and lower disco-cellular veins oblique, curved, of nearly equal length; the upper one arising at a short 

 distance from the origin of the first branch of the postcostal vein ; the lower one uniting with the median vein 

 close to, or exactly at, the origin of the third branch, closing the discoidal cell in an acute point. 



Fm^e Legs very minute, and thickly clothed with long silky hairs. The tarsus slender, as long as the tibia, and 

 destitute of joints or claws. Fore Legs of the female rather longer than those of the male, slender, scaly, 

 destitute of hairs, of nearly equal thickness throughout ; the tarsal articulations concealed by scales : obliquely 

 truncate at the tip, where are a few short spines indicating the very short terminal joints. 



Four Bind Legs rather short, slender, scaly. Tibia but very slightly furnished with a few short spines ; tibial 

 spurs rather long. Tarsi nearly cylindrical ; basal joint half the length of the tarsus, with but a few very 

 short spines on the under side. Ungues very much curved. Paronychia very slender. 

 Abdomen small. 



Caterpillar (of D. Portlandia) long, subcylindrical, longitudinally striated; the head with two erect 



horns; and the body terminating in two obliquely porrected points. 

 Chrysalis short, thick, rather constricted across tlie base of the abdomen ; head-case obtusely rounded. 



The hairy eyes, slender elongated palpi, dilated base of the costal vein of the fore wings, the middle and outer disco-cellular veins of 

 nearly equal length, and the acute termination of tl\e discoidal cell of the hind wings by the junction of the outer disco-cellular vein 

 with the median vein at the origin of its third brancli, are the chief characters of this genus, the species of which are, for the most part, 

 natives of tlic East Indies, or islands of the Eastern Arcliipelago : the only e.xception, in fact, being tlio Nortli American D. Portlandia, 

 the transformations of which have been illustrated by Messrs. Buisduval and Leconte, in their work on the Lepidoptera of North 

 America, and which differs from the other species in having the upper surface of the fore, as well as the hind, wings marked with large 

 ocelli. This species, indeed, ajiproaches very closely to the genus Lasiommata; but its fore wings are somewhat concave along the 

 apical margin, and tlie hind wings are angulated in the middle of the outer margin. 



The typical species, D. Europa, is marked on the under side of the hind wings with a series of large eyes, the centre of each of 

 which is marked with irregidar black patches irrorated with wliite scales. 



There are several undescribed species in our collections which I have not thought it necessary to enter in the following list. I have 

 added D. Arcadia to the genus, although Cramer's j)!. 116. f. F. does not indicate the position of the outer disco-cellular vein of the 

 hind wings with sufficient precision to enable me to be certain as to its position. By Iliibnor it was ranged near the Vanessa3. 



DEBIS. 



1. Oku. Ki K(ii" 



Papilii) Europa Fahricius, Si/xt. Ent. \i. .500., Ent. Si/xl. 



III. pt. 1. p. 76. 11. a.iS. ; Godnrt. Em: M. ix. p. 't7«- 



n. (). 

 Lethe Kuropa Hiihiier, J'erx. hek. Sc/im. 11. SSI. 

 Oreas marinorea Europa Hiibnfr, Samml. exot. Sclnn. liil. 



i. pi. - . 

 Papilio Bi-roe Cramer, Pa/i. pi. 7!). f. CD. 

 Mim-li 1. I 851. 



Papilio Arete Cramer. Pnp. \>\. 31."?. f. E. F 

 .Java, Aniboyna, India, Penang. 



B. .\I. 



tl. Drb. Abi'Adia. 



Papilio Arcadia Cramer, Pap. pi. 11 6'. f. I). E. ; Hnbiier, 



Verz. Ml. Schm. 11. 27.0- (Temenis Arcadia) 

 Salyrus ("aumas Gnitart, Ene. M. ix. p. -t7,Q. 11. 7. 

 Java, Sumatra. 



5 B 



