611. 

 PACHYCNEMIA HIPPOCASTANARIA. 



Order Lepidoptera. Fam. Phalaenidse. 



Type of the Genus, Geometra Hippocastanaria Huh. 



Pachycnemia Step., Curt. — Chesias Och., Goda. — Geometra and 

 Alsophila Hub. — Phalaena ? Haw. 



Antenna rather short, inserted close to the eyes on the crown 

 of the head, slightly tliickened in the middle and serrated in the 

 male (I), clothed with scales above, pubescent beneath. 

 MaxilliB nearly as long as the antennae, slender and spiral (3). 

 iaSzaZjoff/pi forming a short beak, porrected horizontally, rather 

 stout and clavate, clothed with small scales (4) ; triarticulate, 

 basal joint considerably the longest, curved at the base, 2nd 

 nearly straight and linear, 3rd minute and oval (4e). 

 Head small: eyes rather large and prominent i^). Thoxdcs. small. 

 Abdomen slender, slightly curved and tufted at the apex. Wings 

 forming a triangle in repose, superior narrow, elongate-trigonate, 

 the apex ovate : inferior trigonate-ovate. Legs, posterior short : 

 tibiae, anterior short, with an internal spine, the others spurred at the 

 apex, posterior incrassated in the male, suhfusiform, with a fascicle 

 of long hairs on the inside, a pair of short spurs at the apex, and 

 another pair, one being very short, a little beloio the middle (8 f). 

 Larva unknown. 



Hippocastanaria /fjifi. — Geom.pl. 36. f. 186. (J. — Curt. Guide, Gen. 

 916. 1. — anomalata Haw. in Ent. Trans. — degenerata Hub. 

 pi. 78./. 405. ?. 



Shining reddish-grey ; superior wings with a broad pale brown 

 fascia narrowed towards the interior margin, the basal margin 

 angulated, the posterior crenated, with a paler external edge, a 

 lunate dot on the disc more or less obscure and the nervures 

 partially brown ; the margin at the base of the cilia dotted with 

 brown : abdomen and inferior wdngs very pale ochre, the latter 

 inclining to cinereous, except at the base, with a sinuated line 

 across the middle and an obscure spot on the disc. 



In the Author's and other Cabinets. 



