411 
which has been pasted on the side of the head, the disk is ante- 
riorly less flattened than behind and its front end is convex. The 
upper surface of the head witli nine pairs of rather short or short, 
subcylindrical, curved hairs; having no other species for comparison 
I will not produce a lengthy description of these hairs, but refer to 
the figure whith exhibits their arrangement and their length. 
Antennæ (fig. 3 b). The two front hairs on the fourth joint 
are very short, about half as long as the joint. The upper branch 
is slightly more than three times longer than broad and a little 
longer than the two distal joints together; the fiagellum is three 
times longer than the branch and considerably shorter than the 
breadth of the head. The lower branch is about three fourths as 
long as the upper, almost twice as long as broad; the anterior 
margin is a little longer than the posterior, and the end obliquely 
rounded; the anterior fiagellum is rather little shorter than that of 
the upper branch and quite as much longer than the posterior fla- 
gellum. All three flagolla are siender and slightly thickened at 
the end; the unringed basal portion of the longest fiagellum is 
nearly as long as the breadth of the lower branch and a little lon¬ 
ge i than the same pait of the two other tiagella. The globulus 
is shortly ovate; its transverse diameter is a little shorter than 
that of the upper branch and somewhat shorter than the stalk. 
Trunk (fig. 3 a and 3 d). The two posterior pairs of tactile 
setæ aie equal in length and thickness; they are proportionately 
\eiy short, very thin, and the distal third has a number of whorls 
ot vertical pubescence. The third pair (fig. 3 c) at least as long as the 
fifth; at the end of the basal third begins a long hollow swelling, 
about four times longer than thick; the distal half of each seta is 
veiy thin, tapering, near the swelling with very short pubescence 
and the rest adorned with numerous whorls of rather long, vertical 
pubescence. All the setæ on the trunk rather similar in shape 
(fig 3 e and 3 f): they inerease gradually in thickness from the base 
to near the middle which is thick, and from thence they taper to 
the acute apex; besides they are stifl and less or more curved. but 
