SATYKIXAK: CKKCVOXIS ALOIM-:. 163 



in its soft flexible nature, ^^'e have an approach to this in all the appen- 

 dages of the INIelitaeidi and Argvnnidi, and especially in the elongated 

 tnhercles of the first thoracic segment of many Argynnidi. lint in all of 

 these cases these tnhercles are covered with bristle-hearing pa[)illae of a 

 consj)icuons kind, while in those with which we close this snmmary, the 

 tentacles, as they nniy perhaps better be called, are to all appearances 

 simply fleshy masses ; bnt on a close examination they also will be seen to be 

 co\ered with minnte downy hairs, each hair arising from a little basal 

 pa[)illa. These fleshy filaments occur in our New England fauna only in 

 two S[)ecies of widely differing groups, viz., the caterpillar of Laertias 

 philenor, where they are arranged in several rows along the body and are 

 often highly colored, and in Anosia plexi})pus, in which as in other 

 Euplocinac there arc l)ut two or three pairs of these filaments of varying 

 length. In both of these instances, the filaments are nuich more fleshy 

 than in the case of the elongated thoracic tubercles of the Argynnidi, as is 

 quickly shown in the attempt to inflate the caterpillar skin in hot ovens, 

 M-hen these |)arts usually contract to the last degree, and so are difficult to 

 jireserve in any natural condition, while this is far less the case in the 

 Argynnidi. 



It will be seen by this brief review that the clothing of caterpillars 

 is very varied in character, as each of the appendages specified may 

 have an infinite variety of forms and degrees of development. But it will 

 hardly escape notice that if we eliminate from the list all those forms 

 which occur only in caterpillars which still bear the same character which 

 they had in the egg, and which they throw off with their first ecdysis 

 after feedino- the catalofjue would be o-reatly abridiicd. It mav further be 

 noted that there are comparatively few instances in which those forms of 

 dermal appendages which are very general in juvenile caterpillars, and 

 then characterize large groups, appear in any form whatever in later stages 

 of either the same or other groups. The bearing of this point upon the 

 theory of the origin of metamorphosis in insects is evident. 



Table of species of Cercyonis, based on the imago. 



Ocelli of fore wiiig?* enclosed in a coininon, perfectly distinct, yellow band alope. 



Ocelli of fore wings enclosed in a very indistinct common pale l)and or in none at all..iiephele. 



CERCYONIS ALOPE.— The blue-eyed grayling. 



[Blue-eyed ringlet (Gosse) : snioDth hipparchy (Emmons) ; alope bnttcrtly (Harris) ; hine-eyed 

 grayling (Scudder) ; brown butterfly (Ross); yellow-spotted wood butterfly (Maynard).] 



Papilio alope Fabr., Entom. syst., iii: 229 524 (1819) : — Boisd.-LeC, L(5p. Amer. sept., 



(1793) ;— Jones, Icon., tab. 12, fig. 1;— Abb., 228, pi. .59, figs. 1-1 (1833);— ^lorr., Syn. Lep. 



Draw. ins. Ga.. Brit, nnis., vi : fol. 24, figs. X. Amer., TG-TT (1802;; — Edw., Proc. Entom. 



46-49. soc, Philad., vi : 19.V200 (1866); Can. eut., 



Satt/n's alope God.. Encycl. m(?tb.. ix :4T1. xii: 24-32 (1880); Butt. X. Anicr., ii, Sat. 2 



