[June 1883. BULLETIN BROOKLYN ENTOM. SOU. VOL. VI. 21 
there is any difference the upper pair is longest, and the inner spur al- 
ways exceeds the outer in length. 
Modifications of this member are still more rare and there ate few 
that I know of except sexual modifications of clothing. 
The “dtae or some pairs of them are often spinose: often all are so 
armed but most generally the middle and posterior pair only -and when 
one pair only is spinose it is always the middle one that is thus modified. 
In addition to this armature the anterior tibia has another, peculiar 
to it: this consists of claws or spines at tip, and to accommodate this 
armature the tibia is often greatly modified as will be explained hereafter. 
The arsz in the Nocturds are always five jointed, and always spined, 
though sometimes only feebly so, and in one instance to be hereafter 
specified obsoletely so. : 
The joints differ in length, the basal being always longest, and some- 
times longer than the anterior tibia : sometimes they are peculiarly clothed 
in the ¥‘ but in no other respect have I noticed any noteworthy variation. 
Terminating the tarsi is a pair of claws which vary greatly. 
The claws are united to a short stalk, terminating in a ball to fit 
into a socket in the last tarsal joint. 
The claws are sometimes simple more usually dentate sometimes bi- 
fid occasionally notched at tip or otherwise modified in modes to be 
hereinafter described. 
Thus having gone over the parts of the leg generally we are ready to 
proceed to particulars. . 
Agrotis may be considered as the type Noctua: the tibia are in most 
instances all spinose; sometimes the anterior are not so. The tarsal claw 
is toothed. 
The tip of the anterior tibia has always been said to be unarmed and» 
in my synopsis of the genera Agro/zs falls into a Section with the anterior 
tibia unarmed at tip : toa large proportion of the species this is applicable 
but Agrotis Fpsilon Rott., and some others have the anterior tibia very 
distinctly spinose, have a very long stout spine at the inner side, and a 
shorter at outer side of tip. | Denuded of clothing and viewed through 
the microscope the tibia certainly can not Le viewed as unarmed at tip. 
Agrotis muraenula G. and R. is if possible mére distinctly armed, for the 
spines are not so numerous at the sides and the terminal spines are more 
prominently set. 
A. Annexa Tr, is the most heavily armed of all the Agrofids I have 
examined ; it has what may be almost termed a true claw at the inner 
