HETEROPSIS. 



Genus LXXXIY. HETEROPSIS. 



Heteropsis Boisduval MS. 



Body small, finely hairy ; fore wings large, veins swollen at the base, apex acuminate-caudate ; liind wings entire. 

 Head moderate-sized, with a conical tuft of hairs in front. 



Eyes large, very hairy. 



Labial Palpi long, slender, obliquely porrected, rather wide apart, and raised to the level of the top of the eyes, 

 clothed with short hairs, especially on the inside and beneath ; the back of the long middle joint not clothed 

 with a conical tuft of hairs resting on the face ; third joint small, slender, and pointed. 



Antennce not half the length of the fore wings ; terminated by a gradually formed, rather thick, elongate-ovate 

 club, composed of only twelve or fourteen joints, rather pointed at the tip, and finely carinated beneath. 

 Thorax small, oval, finely hirsute. 



Fore Wings large. Anterior margin strongly arched from the base to three fourths of its length, whence it is 

 concave to the tip, which is produced into an obtuse tail. Apical margin nearly two thirds of the length of 

 the anterior, emarginate below the apex ; the hinder part slightly convex. Inner margin one eighth longer 

 than the apical, dilated between tlie base and the middle. Costal vein dilated at its base, joining the costa 

 before the middle. Postcostal vein slender, with its branches normal ; the first and second arising before the 

 anterior extremity of the discoidal cell ; the third branch 'arising at about five eighths of the length of the 

 wing ; fourth branch arising at about three fourths of the length, and reaching to the anterior extremity of 

 the produced apex; the terminal portion of the vein extending to its posterior extremity. Anterior 

 disco-cellular arising at the middle of the length of the wing, short, transverse : middle disco-cellular twice the 

 length of the anterior, suboblique, but rather directed inwards towards the base of the wing : outer 

 disco-cellular rather longer than the middle, angulated close to its anterior extremity ; a slender brancli 

 extending from the angle into the discoidal cell ; beyond this angle it is dii'ected rather obliquely outwards, 

 but does not extend beyond the middle of the wing ; uniting with the third branch of the median vein at 

 some distance from the base of the latter, M'hich is angulated at the point of junction, its extremity being but 

 little curved, so that the discoidal cell is closed, being broad, and reaching to the middle of the wing. Median 

 and submedian veins dilated at the base. 



Hi7ul Wings broad, subtriangular. Outer margin rounded, entire. Costal margin much ai'ched near the base ; 

 outer angle somewhat dilated. Precostal vein slender, slightly curved outwards. Costal vein arising close to 

 the base of the precostal, extending only to the middle of the costal margin. Postcostal vein branching at one 

 third of its length. Anterior disco-cellular long, nearly transverse, slightly angulated near its extremity ; 

 outer disco-cellular of the same length, transverse, nearly straight, uniting with the median vein at the base of 

 the third branch, closing the discoidal cell in an acute point ; this third branch curved. 



Fore Legs of the male slender, very small, very densely setose. Tibia nearly as long as the femur. Tarsus two 

 thirds of the length of the tibia. (Female unknown.) 



Four Hind Legs slender. Tibial spurs short ; tibiaj scarcely spinose beneath. Tarsi slender, finely spined 

 beneath. Claws small. Paronychia very small. 

 Abdomen small, oval. 



We are again indebted to Dr. Boisduval, for the communication of his unique specimen of the male of this remarkahle little butterfly, 

 which, in the dilated condition of the veins of the fore wings, approaciies Bia Actorion, whilst in the acuminated extremity of the fore 

 wings it resembles Siderone, and some of the following groups ; the large size of the discoidal cell, closed in all the wings, and the 

 abbreviated condition of the costal vein of tiio liind wings, as well as the hairy eyes, are chai'acters worthy of notice, as well as the 

 slenderness of the limbs and palpi. The peculiarity of the markings of the species also merits attention, as they bear little relation to 

 those of the Satyridre, with which family the small size and dull colours of the species might seem to indicate a relation. In addition 

 to the round black spot between the first and second branches of the median vein, there is a very minute white dot on the upper sides, 

 between the two discoidal veins, toward the apical margin, exactly corresponding with the centre of the lai'gest of the row of small white 

 spots seen on the under side of the fore wings, extending to the tip ; there is also a curved row of seven small white dots on the 

 under side of the hind wings, half way between the middle and the outer margin. 



HETEROPSIS. 



1. Heteropsis Drepana nov. sp.* 



Heteropsis Drepana Boisduval MS. ; Douhl. Wextw. Jy HewUs. Gen Dinrn. T,e]). pi. 6.3. f. 5. 

 Madagascar. 



* H. alis supra fuscis, anticis ocello parvo nigro pupilla alba puncto(|iie albo pone medium ; subtus palli<lioiibus, fulvo-brumifis griseo nigroque irroratis : 

 anticis obscurius nebulosis serieque apicale maculaium sex parvarum albaiiun ; posticis fascia indistincta media fusca punctisque septem albis inter medium et 

 marginem posticum positis. Expans. alar, antic, unc. fere 2. 



December 2. 1850. 4 Q 



