160 
Of Storews and EHmplesis, Mr. Blackburn remarks* :—“ The 
two genera appear to me to be very close to each other, and I 
cannot find any more exact structural difference than that the 
form of Hmplesis is much more narrow and oblong, and that its 
second ventral segment is evidently less abbreviated than in 
Storeus.” In his tabulation of the Erirhinid genera,+ the two 
are separated by the femora of Storews being dentate, and 
edentate in Hmplesis. 
An examination of extensive material (over 60 species, of the 
majority of which I know both sexes) has convinced me that 
Emplesis cannot be maintained as a genus apart from Storeuws. 
An extraordinary feature, more or less noticeable in almost all 
the species, is the apparent doubling of several or all of the 
joints of the funicle.{ This apparent doubling is not caused 
{though usually rendered more pronounced) by dark rings, but 
by actual constriction of the joints themselves, usually, but not 
always, in front of the middle. In some species the joints are 
so strongly constricted that it is actually difficult to tell to which 
joint a part belongs. 
Neither Mr. Pascoe nor Mr. Blackburn have referred to the 
costz on the male rostra. These, however, are scarcely notice- 
able under a Coddington lens, being usually acute and more or 
less obscured by scales. They are seven in number (sometimes 
the median or three median ones are almost obsolete), are narrow 
and acutely raised, and terminate at, just before or just behind, 
the antenne. Frequently the median costa is feebly continued 
to the apex. 
The sexual differences in the majority of the species are usually 
very pronounced. The rostrum of the male is always shorter, 
and usually much shorter, than that of the female, but is longer 
than the prothorax,|| is nearly always much more noticeably 
costate, is frequently bent only near the apex (arcuate through- 
out in the female), is usually squamose to the antennz, instead 
of at the extreme base only, as in the female, and is always more 
distinctly punctate in front of the antenne. The antenne are 
stouter in the male, the scape is inserted nearer to the apex of 
rostrum, and a much greater portion passes the apex. The rela- 
tive length of the scape to the funicle and club is sometimes 
different. The club is generally much more elongate in the 
female than in the male. The metasternum and abdomen of the 
= 2852, N.S. W.5 1892,, p./ 142; 
+ T.R.S., S.A., p. 150 e¢ seq. 
+ This appearance can only be seen under a compound power, and 
appears to be confined to the males. 
|| With the exception of #. notata (Blackburn), which is described as 
having the rostrum of the male ‘‘ prothorace paullo breviori.” 
we 
. 
