SS Se ee 
—107— 
have kindly placed at my disposal such material as I needed, and to 
them I give sincere thanks for the assistance rendered me. Prof. Riley's 
material I have constantly used as my own, and owing to the many bred 
specimens contained in it, it was most valuable in deciding specific 
limitations. Finally I would ask all those who are interested in this 
family and desire to aid me in future work to send me for study such 
local material as may be most abundant with them. Lveryrhing, even 
the most common species are desirable. I will gladly name in return, 
all those forms which they may find difficulty in identifying. 
Some Modifications in the Leg Structure 
of Deltoid Genera. 
Among the most interesting groups of the Wocfuidz, are the Delloids. 
The group has been variously referred to the Pyralide or Noctuidae, but 
seems to me better placed with the latter. It is a very decidedly peculiar 
one, offering many striking characters, yet impossible of such definition 
at present, that family rank can be accorded to it. The genera and 
species were amung the first studied by me, and the manuscript is over 
four years old. Since it was written I have seen many more specimens, 
and have been able to complete my knowledge of species. In conse- 
quence the work must be largely re-written to bring it up to my present 
knowledge. One of the most attractive features of the study of this 
group was found in the secondary sexual characters, and more parti- 
cularly those tuftings of the fore legs which might be considered as scent 
organs. Striking as these structures are, they have been completely over- 
looked, only the most casual references to them being found, and while 
the similar though differently placed tuftings in the Sphingzd@ were care- 
fully studied, the beautiful characters of the De//oids recived no attention. 
I first gave a sketch of these structures at the Philadelphia meeting of 
the A. A. A. S., before the Entomological Club, and afterwards called 
attention to them before the Biological Society of Washington. On these 
occasions I also called attention to some of the peculiarities of antennal 
structure, which will not be considered here. In view of the fact that it 
will be some time before the revision of my manuscripts can be com- 
pleted, and of the interesting and important nature of these structures, I 
have concluded to publish in advance of the systematic portion of my 
work, a brief description of the more prominent modifications, aiding 
the verbal descriptions by figures. 
In the more typical genera of the Woctuide —the non fasciate of Mr. 
Grote—we find little in the way of secondary sexual characters, while as 
a rule the primary characters are well developed and specifically peculiar: 
