APtGYROPHENGA. CHIONOBAS. 381 



Thorax rather small, oval, moderately hairy. 



Fore Wings elongate-subtriangular. Fore margin but slightly arched ; apical angle rather acute. Apical margin 

 entire, convex, about three fifths of the length of the fore margin; anal angle very much rounded. Inner 

 margin longer than the apical, nearly straight. Costal, median, and submedian veins slightly dilated at the 

 base. Costal vein reaching rather beyond the middle of the costa. Postcostal vein with its first branch arising 

 just beyond the anterior extremity of the discoidal cell ; second and thiixl branches arising at nearly equal 

 distances apart ; fourth branch arising at a shorter distance from the third than the space between the second 

 and third ; the terminal part of the vein rather deflexed beyond the fourth brancli. Upper disco-cellular vein 

 obliterated ; the upper discoidal vein arising at the extreme tip of the discoidal cell : middle disco-cellular vein 

 arising before the middle of the length of the wing, directed towaixls the base of the wing, very strongly 

 angulated beyond its middle, its terminal portion being directed outwards ; a minute spur being emitted into 

 the discoidal cell at the angle : lower disco-cellular vein about as long as the middle one, nearly continuous 

 with the outer portion of the latter, oblique, closing the discoidal cell in a rather acute point at a little distance 

 before the middle of the wing ; uniting with the third branch of the median vein at about the same distance 

 from its base as exists between the bases of its first and second branches ; the third branch being obtusely 

 angulated at the place of junction. 



Eiiid Wings nearly regularly obovate, entire ; outer and anal angles much rounded. Costal margin considerably 

 arched. Costal vein not extending to the middle of the costa. Precostal short, curved outwards. Postcostal 

 arising nearer the body than the precostal, branching at a moderate distance from its base, the branch 

 extending to about three fourths of the costal margin ; terminal part of the postcostal vein extending to the 

 place of the outer angle. Upper disco-cellular vein arising at a very short distance beyond the branch, equal 

 in length to the space between the base of the postcostal vein and its branch ; rather angulated near its base, 

 and throwing off a very short spur into the discoidal cell, directed towards the base of the wing: lower 

 disco-cellular vein very short, more transversely oblique, closing the discoidal cell in a rather acute point, by 

 joining with the third branch of the median vein at about the same distance from its base as exists between the 

 first and second branches, the third bi-anch being obtusely angulated at the place of junction ; the discoidal 

 cell does not reach the middle of the wing. The spaces between the veins are longitudinally streaked -with 

 silver. 



Fore Legs of the male extremely minute, clothed with very long hairs. Tarsus exarticulate, equal in length to 

 the femur, very acute at the tip. 



Four Uind Legs rather short. Femur hairy within. Tibia armed beneath with rows of very fine and rather 

 long spines ; tibial spurs rather long. Tarsus moderately spined beneath. Ungues long, irregularly curved, 

 entire. Paronychia very deeply bifid ; inner division nearly as long as the outer and broader. 

 Abdomen very long and slender. 



This genus is closely allied to Erebia in its general appearance, colouring, and ocellation, but is distinguished, not only by its short 

 antennaj, long body, and rather elongated wings, but especially by its long palpi, which, with its short antennte, give it some 

 resemblance to Libythea, from which it is, however, at once separated by its entire subovate wings. The silver streaks on the under 

 surface of the hiud wings, running longitudinally between the veins, distinguish it from all the rest of the Satyrida;, giving it a distant 

 resemblance to some of the fritillary butterflies. The only known species is a native of New Zealand, where it was discovered by P. 

 Earl, Esq., frequenting a plain in the southern island. According to the observations of Mr. Earl upon its habits, they seem much to 

 resemble those of the subalpine species of Erebia. 



ARGYROPHENGA. 



1. Argyb. Antipodum E. Doubleday in Ann. Nat. Hint. xvi. p. 307. ; Douhl. Westw. &j Heuits. Gen. D. Lep. pi. 63. f. 3. 

 New Zealand. 13. M. 



Genus XX. CHIONOBAS. 



Chionobas Boisduval, Duponchel, E. Douhl., 11. Sclmff. 

 Satyeus p. GodK, Latreille. 

 HippAKCniA p. Ochsenheimer. 

 Erebia p. Dalman. 



Body very hairy ; wings but moderately clothed with scales, of a dull brownish buff, or dirty fulvous colour ; the liind 



winirs beneath much freckled. 

 Head very small, and very hairy. 

 Eyes prominent, naked. 



Antennce short, slender, gradually thickened from the middle into a long but not thick club, obtuse at the tip, 

 concave, finely carinated beneath. 



