TEIRACHOPODA.— ORGANOPODA. 147 
ACIDALIIN^. 
TEIRACHOPODA, g. n. 
Male. Autennfe bipectiuated. Palpi long, the third joint porrect. Hind tibia with one 
median and two distal spurs. Fore wing with the five subcostals stalked together, the fifth 
arising nearest the end of the cell. 
Type T. {Anisocles) subroseata, Wlk. 
In Perixera, Meyr., the first subcostal arises separately and then anastomoses with the 
others, and the hind tibia is much shortened and gives rise to a tuft of hair with three long 
curved spines lying over it. 
In the species arenosaria, Moore, and pauper, Butl., which will form a section of 
Perixera, with which the venation agrees, the males have the tibia of normal length, but 
bearing only the terminal pair of spurs. 
Anisodes, Guen., type urcearia, includes some South-American species with a dififerent 
arrangement of the subcostal venation of the fore wing. 
Trirachopoda ignorata, Wlk. (Plate CLXIX. fig. 2.) 
Anisodes ignorata, WJlc. Cat. xxvi. p. lo84. 
Expanse 1|; inch. 
Female. Uniform yellowish red-brown, the underside paler ; frons ferruginous. 
Trirachopoda anulifera. (Plate CLXIX. fig. 15.) 
Expanse ly^^ hich. 
Female. Fore wing ochreous, irrorated with dull red scales ; two submarginal series of 
purplish spots; a marginal series of specks. Hind wing similar to the fore wing, except in 
having a conspicuous white dark-outlined cell-spot. Underside tinged with pink. 
On one fore wing there is a black spot at the upper corner of the cell. 
ORGANOPODA, g. n. 
Male. Antennae fasciculated. Palpi long, the third joint porrect. Hind leg much 
aborted and modified into a sensory organ ; a tuft of long hairs reaching to the end of the 
tarsus springs from the base of the tibia, the distal portion of which is much modified in 
shape and has only the terminal pair of spurs, the inner spur having the form of a hollow 
vesicle pigmented black inside, with an aperture near the origin from the tibia; the outer 
spur normal ; the first two joints of the tarsus are also much modified, being bent and 
produced outwards into a thin curved corneous wing, forming a shield lying over and 
protecting the modified spur ; the three terminal joints of the tarsus and ungues very 
u 2 
