378. 



ORGYIA GONOSTIGMA. 



The scarce Vapourer or Orange Tussock Moth. 



Order Lepidoptera. Fam. Arctiidae. 

 Type of the Genus, Bombyx antiqua Linn. 

 Orgyia Och., Curt. — Bombyx Linn., Haw. 



AntenncB inserted near the eyes, on the crown of the head, short 

 and bipectinated to the apex in the male ; the basal joint sub- 

 globose, with a fascicle of hair on the inside, the remainder pro- 

 ducing two pubescent branches, each furnished with 2 bristles 

 at the apex (1) ; very short and composed of about 20 joints in 

 l\\& female, each producing 2 short branches, excepting 2 or 3 

 at the base, and the apical one, each branch furnished with se- 

 veral bristles (1 $, the apical joints). 



Maxillce undiscovered in the male, very short and remote in tlie 

 female. 



Labial Palpi porrected horizontally, meeting at the apex and 

 densely clothed with scales in the tnale (4), biarticulate, basal 

 joint small and clavate, 2nd large subovate-conic (4 a): smaller 

 and remote in the female, the 2nd joint subovate, with a brush 

 of hair at the apex (4 9). 

 Male. Head and eyes small {7 a). Thorax clothed with long scales. 

 Abdomen slender. Wings when at rest forming a triangle ; superior 

 subtrigonate, inferior rounded. Legs, anterior porrected when at 

 rest, very hairy. Tibiae, anterior broad, densely clothed with long 

 hairs, the others spurred at the apex. Tarsi 5-jointed, basal joint the 

 longest. Claws and pulvilli minute (8, fore leg). Female apterous, 

 having 2 small appendages only attached to the thorax (9 $), densely 

 clothed with hairy scales especially towards the apex, the costa thick- 

 ened and there are also 2 thick longitudinal nervures. Abdomen very 

 large hairy and filled with eggs. Legs alike. 



Larvae hairy with fascicles of hairs on the head and tail, and tufts on 

 the back, having 6 pectoral, 8 abdominal, and 2 anal feet. Pupa 

 inclosed in a slight cocoon. 



GoNOSTiGMA Linn. Syst. Nat. 826. 57. — Curtis's Guide, Gen. 813. 1. 

 Male. Deep brown with an orange tint. Superior wings with 

 a small and large castaneous spot at the base, surrounded with a 

 pale lilac line, a large dark brown stigma in the disc, and a 

 transverse oblong spot of the same colour below it, beyond is an 

 irregular and interrupted orange fascia, with the posterior margin 

 very much sinuated and irregularly bordere J with white, forming 

 spots towards the apex and posterior angle : cilia spotted with 

 black : inferior wings darker brown ; the cilia ochreous, bearing a 

 brown line. 



Female clothed with rather long soft curled hairs, dark reddish 

 brown : eyes black : antennae and tarsi ochreous. 

 In the Author's and other Cabinets, 



