° 
~I 
1894. | NEW YORK ACADEMY OF SCIENCES. 
Abdominal feet partly aborted except on 
6th and 9th segments .... ........ BREPHID®. 
Abdominal feet aborted or partly so on. 
Semmens >o ald 4) 2a jacc ee.) a sept NocTurIp& (in part). 
Tubereles with hair more or less increased, but 
not forming true warts, greatly ob- 
scured by the development of abun- 
{ NoropoTIpD® (in part. ) 
dant secondary hairs, .............. 1) LA STOO AMP UEAE 
Tubercles converted into warts. On the meso- 
and meta-thoracic segments above the 
stigmatal warts— 
( Nocrurb.® ( Bombycoide ). 
| LITHOSITID2. 
ERO UWALUS PLESCO sicetalels sarele <cej erie oiecois : 
caacod og pak apy | ARcTrID®. 
| PERICOPID.(?) 
One large wart only present, ........ -.-. EUCHROMIID. 
{ LYMAN 2. 
Threeswarts Present, sere... sles we ei< ae eee TE 
*** | EUPTEROTID®. 
The differences in the arrangement of warts on the thoracic 
segments in the last section result from the considerable num- 
ber of primitive setze on them (see Fig. 2), so that there is not 
room for each to produce a wart. The consequent doubling up 
has proceeded on two lines. In the first ia and ib forma single 
wart, iia and ii b the second, iv and y the third (stigmatal wart), 
iii remaining rudimentary or disappearing and vi forming the 
fourth wart. This is the form exhibited by the Arctians and 
higher Noctuids. In the Euchromiide the two upper warts are 
consolidated. In the second line (Lymantriidze), ia apparently 
forms the first wart, sometimes rudimentary, ib and iia the sec- 
ond, and iib the third; the fourth (stigmatal) wart is probably 
formed much as is the corresponding one in the Arctian type. 
In a few genera of the Arctiidz and in the Euchromiide tuber- 
cle vi is present in the first larval stage, though warts do not 
appear till the second stage. In the Lymantriidz the primitive 
first stage is wholly wanting, the larve hatching with well 
developed warts. I am unable to place the genus Nola, as I 
have not seen stage I. of any species. I must provisionally 
exclude the genus from the superfamily Noctuina, as the ar- 
rangement of warts does not correspond. The structure of the 
legs is paralleled in the deltoid noctuid genus Hypena. 
In this connection I would like to discuss briefly Mr. A. G. 
Butler’s paper on “ The natural affinit es of the Lepidoptera 
referred to the genus Acronycta,”’* published some fifteen years 
ago. I have not seen any refutation of Mr. Butler’s arguments, 
*Trans. Ent. Soc. London, 1879, pp. 313-317. 
