Mr. J. 0. Westwood on new species of Saturnia. 295 



The hind wings have a similar-sized vitreous patch in the middle, 

 its basal edge being nearly straight, preceded by an arched white line, 

 outwardly edged with black and connected towards the costa with the 

 strongly-waved white line (inwardly edged with black) on which the 

 apex of the vitreous patch rests ; the ashy buff margin of the wing 

 bears a series of small black spots, followed by a very slender waved 

 black line. 



On the underside the wings have the base of a rich darker brown 

 colour (extending as far as the undulated transverse striga), the api- 

 cal half of the wings (as well as the costa of the hind ones) being 

 much paler. 



The antennae of the males are not very broadly feathered ; they 

 are 32-jointed, each joint emitting four branches of equal length, ex- 

 cept about eight of the terminal joints, in which one of the pairs of 

 branches gradually diminishes in length, and becomes obsolete in 

 two or three of the terminal joints. The antennae of the female are 

 less strongly feathered, and one of the pairs of branches becomes ob» 

 solete in about seven of the terminal joints. 



Saturnia Zacateca, Westw. S. alls valde angustis subfalcatis 

 nigris, omnibus macula maxima vitrea, anticis striga basali geni- 

 culata alba, ad apicemfulvo, castaneo griseoque variegatis, fascia 

 interrupia alba extus rufescenti ; posticis nigris, prope marginem 

 posticum fascia interrupta alba extus castanco-rufa, margine poS' 

 tico griseo variegate, ^ 

 Expans. alar, antic, unc. 3f . 



Hab. in Bogota, Americse Meridionalis. In Mus. Hope. 

 This curious species is at once distinguished by its very narrow 

 wings and the large size of the glassy spots, especially in the hinder 

 pair ; the body is black, with a white ring round the neck and a less 

 distinct fascia across the hind part of the thorax. The antennae are 

 very strongly branched ; the fore wings are especially long and narrow 

 and slightly falcate at the tip, which is rounded ; they are of a black 

 colour, slightly tinged with chestnut, and powdered, especially along 

 the fore margin, with grey scales. A narrow, straight, white striga 

 extends from the base of the wing to the vitreous spot, where it is an- 

 gulated, and runs towards the fore margin. The centre of the wing is 

 occupied by a large, elongated, suboval heptagonal vitreous spot, which 

 is not traversed by any transverse vein, the branches of the median 

 vein being pushed so far backward, as to admit of its occupying so 

 large a clear space ; a narrow white fascia extends from its extre- 

 mity to the costa, and irom the middle of its hinder margin to the 

 hind margin of the wing, the space between which and the apical mar- 

 gin is varied with chestnut, red and grey scales and luteous patches. 

 The tip of the wing is orange, with a chestnut patch and a white 

 angulated line, below which is a large oval chestnut-red patch, bear- 

 ing a black spot and divided into several parts by dark luteous lines. 

 The hind wings are almost entirely occupied by a large oval glassy 

 patch destitute of veins, the subcostal vein being pushed towards the 

 costal margin, and the median one towards the anal margin, and their 



