— io8— 



In the /ascici/ce on the contrary, the primary characters become indefinite, 

 weak, hardly worthy of close siudy, while the tendency to secondary 

 characters becomes marked. There is an especial leaning to tufiings or 

 other modifications of the legs, many of which have long been known, 

 but — as in the case of Catocala — have been only recently brought to the 

 attention of entomologists. Remigia latipes indicates by its name the 

 effects of the tibial and tarsal tufiings, while under the name Cupioc7temia, 

 Zeller described as a De/loid \\\e contorted and tufted posterior tibia of 

 Pleoneciyptera Grote. In the Deltoid genera the modifications of leg 

 structure are confined lo the anterior pair, and extend to a complete 

 change in the type of the structure. In Hypena and Bomolocha there is 

 little modification. The coxae are grooved to allow the femur to be 

 closely applied to it, the femur is a mere shell into which the tibia can 

 be almost completely concealed. The tarsi are normal, and the tibial 

 epiphysis is close to the base of that joint, and of rather small size. The 

 figure (i) shows the fore leg ol Plathypena* scabra. 



Megachyta lituralis indicates the type more usually found in the 

 Herminiincz. The coxa is a mere shell, concave anteriorly to receive 

 the convexity of the femur, which has a brush of comparatively short 

 hair near the base, at rest folded into the concavity of the under side. 

 The tibia is modified into a flat chitinous process which begins at the 

 epiphysis, the first tarsal joint being here inserted, and nearly equalling 

 in length the femur. This chitinous process of the tibia is clothed with 

 long scales and hair, but no tuft or pencil of hair. This structure is 

 shown at figure- 2, and marks the simplest form of this type. 



Chytolita morbidalis is after the same general type, but marks an im- 

 portant change. The coxa is as before, but there is a pencil of longhair 

 inserted at the base, renting in the concavity, and capable of being spread 

 fan-like. The femur here has the concavity upward, and at the tip is a 

 thick pencil of long hair spreading out fandike, as in the figure, and 

 normally reposing in the concavity. The tibial structure is as before, 

 save that the clothing of hair is much longer and mote dense, much 

 more so than shown in the figure (fig. 3). The ist tarsal joint is long as 

 in Megachy/a. When in repose, the pencils of hair folded, the femur 

 closely ap[)ressed to the coxa, no part of this structure is visible, and the 

 tibial process meeting the casual view and densely clothed, is usually 

 considered the lolded tufi. The structure in some European Herrninia 

 is identical, or nearlv so. 



* In this paper I use the generic terms used in Mr. Grote's catalogue as a matter 

 of convenience, since synonymical matter is better left to the systematic part of the 

 work. 



