50 TRANSACTIONS OF THE [Nov. 12, 
character is not an “absolute diagnosis of Macro-Heterocera,” 
as Dr. Chapman states it to be,f at least not in the form in 
which it has been presented. Probably a careful study of these 
structures would tend to elucidate the phylogeny of the lepi- 
dopterous families, as in the case of any other series of charac- 
ters; but I am of the opinion that the subject is here more 
difticult, more obscured by special adaptations, than in the case 
of the larval tubercles. 
Suborder JUGATEA. 
Through the kindness of Dr. T. A. Chapman, I have received 
the larva of Micropteryx purpurella from England. The ar- 
Fie. 1. A SEGMENT OF MicROPTERYX PURPURELLA. 
rangement of its sete is shown in the figure (Fig. 1). These 
correspond quite well with those of Hepialus, except that the 
four on the base of the leg are absent; but this species of Mi- 
Fic. 2. A THORACIC SEGMENT OF CossuUSs cossUS, TYPICAL OF ALL 
FRENATA, 
cropteryx has no legs. It has a double dorsal shield on every 
segment, which may account for the unusually posterior posi- 
;+ Trans. Ent. Soc. London, 1893, p. 106. 
