300. 



HIPPARCHUS SMARAGDARIUS. 



The Essex Emerald. 



Order Lepidoptera. Fam. Phalaenidae Lat.^ Leach. 



Type of the Genus, Phalsena Papilionaria Linn. 



HippARCHus Lea., Sam. — Hemithea Goda. — Geometra Hub., Haw., 

 Treit. — Phalsena Linn. Fab. 



AntenncE inserted on the crown of the head, setaceous, pecti- 

 nated in the males almost to the apex, each joint being covered 

 with scales above and producing on each side a clavate ciliated 

 branch (1). 



Maxilla: spiral, much shorter than the antennae, rather robust 

 and only slightly ciliated at the apex (3). 



Labial Palpi porrected nearly horizontally, covered with scales, 

 hairy above and below, the terminal joint appearing naked and 

 distinct (4) ; triarticulate, basal joint short, 2nd long and slightly 

 attenuated, 3rd short spear-shaped (4a), the edges being rigid 

 and compressed, and the apex acute in the male, but not in the 

 female. 

 Head broad, clothed with hairy scales on the crown, with imbricated 

 ones in front. Eyes subovate. Thorax and body often robust, the 

 latter sublinear in the males, ovate-conic in the females. Wings ex- 

 tended obliquely when at rest, the superior covering the inferior, the 

 latter sometimes slightly angulated. Legs long, hinder pair the 

 shortest. Tibiae ; anterior short, producing a dilated spine on the 

 internal side, the others spurred, posterior robust with two pair of 

 spurs, most developed in the females, the lower ones being the longest. 

 Tarsi 5-jointed, basal joint very long in the 4 anterior, the posterior 

 much shorter. Claws and pulvilli distinct (Sf hind leg of male). 

 Caterpillars loopers with 6 pectoral, 2 abdominal and 2 anal feet. 



Smaragdarius Fab. Ent. Syst. v. 3. pars 2. p. 1 5 1 . n. 81. 



Female. Green : Antennae whitish, underside and palpi ochreous ; 

 eyes blackish. Thorax with the anterior scales margined with 

 ochre ; superior wings with the costa of the same colour, 2 si- 

 nuated pale ochreous strigae, one before, the other beyond the 

 middle, between which is a whitish spot. Abdomen, upper por- 

 tion of the inferior wings and the extremity of the cilia whitish. 

 Legs yellowish white, thighs green, anterior tibiae subferruginous 

 on the inside. Underside with the outer striga continued round 

 the inferior wings, in the disc of which is a whitish spot as in the 

 superior wings. 



In the Cabinet of Mr. C. Parsons. 



