314 Plumules or Battledore Scales [^Zml^KTSf 
IV. — Further BemarJcs on the Plumules or Battledore Scales of 
some of the Lepidoptera. By John Watson, President of the 
Microscopical Section of the Literary and Philosophical Society 
of Manchester. 
Having on a former occasion (No. VIII., p. 73) drawn attention to 
certain peculiar scales belonging to the Ehopalocera division of the 
Lepidoptera, as serving in some degree for generic or specific classi- 
fication, and having then limited my remarks to the Pieridse and 
Lycsenidse, I now beg to state the result of observations made in 
other families. 
In conjunction with my friend Mr. Sidebotham a complete 
treatise is in preparation, embracing the whole subject of these 
plumules ; it is to be illustrated with several hundreds of figures ; 
but the completion of the large number of plates necessary will 
occupy considerable time. The figures will be arranged in generic 
groups of all the species (or so-called species) which can be 
obtained, so that observers may judge whether or not the plumules 
of some differently-named species are identical.J 
In the first place, referring to the genus Pieris, already treated 
of, I desire to draw attention to a small group of species placed at 
the beginning of the genus, which display no plumules. There are 
four species, viz. Thestylis, an unnamed neighbour, Clemanthe, and 
Autothisbe : we have before seen that the plumules are the posses- 
sion of the males only ; now, while deficient in this peculiarity, 
these species have another of their own, viz. a strongly-marked 
serrated costal margin of the upper wings, easily felt by running 
the finger along the edge. A short time ago I drew Mr. Hewit- 
son's attention to them, expressing a wish that they might be more 
correctly placed in a new genus. Mr. Hewitson had some time ago 
separated this group in his cabinet, and Mr. A. E. Wallace, who is 
at work on the Pieridse, has done the same; and I was much 
pleased to receive from him lately an inquiry respecting the absence 
of plumules, showing that he attaches value to the subject. He 
EXPLANATION OF PLATES 
Plate XXXIV. 
Fig. 3 . — Euploea Mindonensis. 
„ 2. — „ Alcathoe. 
„ 3. — Heliconia Melpomene. 
„ 4. — „ Thelxiope. 
„ 5. — Eueides Thales. 
„ 6. — Colsenis Dido. 
„ 7. — ^Pieris Lycimnia. 
Plate XXXV. 
Fig. 7.— Agraulis Vanillse. 
„ 8. — Lachnoptera lole. 
XXXIV., XXXV., AND XXXVl. 
Plate XXXV. — continued. 
Fig. 9. — Argynnis Daphne. 
„ 10.— AtEyma Cama. 
„ 11. — Taygetis Eebeeca. 
Plate XXXVI. 
Fig. 13. — Euptychia Canthe. 
„ 14. — Erebia Stygne. 
„ 15. — Satyrus Beroe. 
„ 16. — Argynnis Maia. 
„ 17.— „ Aglaia. 
