Nine Exotic Species of the Genus Gracilaria. 299 



margined on both sides. Beyond the second fascia is a minute 

 costal spot, sometimes imperceptible or only revealed by faint in- 

 dications of its dark margins; just before the apex is the distinct 

 costal white spot slightly curved, and terminating a little beyond 

 the anal angle; in the extreme apex are yet a few whitish scales, 

 followed by a curved black line ; cilia brownish grey. 



Posterior wings grey, with greyish fuscous cilia. 



Thorax white. Abdomen grey above, beneath white, with dark 

 grey bands. 



Anterior legs : femora white, tibiae dark grey, tarsi white, 

 spotted with black ; middle legs — femora white, spotted with dark 

 grey ; tibiae white, with a grey spot in the middle, and a larger 

 dark grey spot at the tip ; tarsi white, spotted with dark grey. 

 Posterior legs : femora white, spotted with dark grey ; tibiae dark 

 grey, with the base and tip white ; tarsi white, with large dark 

 grey spots. 



A true Gracilaria. I have before me four specimens bred by 

 Mr. Atkinson, from larvae found near Calcutta, mining the under 

 side of the leaves of Terminalia Catappa. 



Mr. Atkinson describes the larva as " small but very active. 

 It detaches the lower cuticle over a wide extent of surface : it de- 

 vours both layers of parenchyma, not continuously, but in very 

 small oblong patches, so that the upper surface of the mined por- 

 tion of the leaf, which is blotched with purple, appears thickly 

 sprinkled over with white dots. The lower cuticle, which is de- 

 tached, is very thin and transparent, and, by slightly contracting, 

 it curves the upper portion of the leaf, so as to form a very 

 spacious vaulted chamber for the little resident." 



" On attaining its full growth, the larva leaves the mine and 

 spins in some convenient corner a compact white cocoon." 



Gracilaria nitidula, n. sp. (PI. X. fig. 9.) 



Alis anticis olivaceo-fuscis, macula dorsali prope basim, fascia 

 (ad costam attenuata) ante medium, maculis oppositis pone 

 medium, strigulaque obliqua apicem versus margaritaceis. 



Exp. al. 3| lin. 



Head and face white. Maxillary palpi white. Labial palpi 

 white, the second joint with two grey spots, one in the middle 

 and one at the tip. Antennae grey. 



Anterior wings bright olive-brown, with pearly white markings, 



