a new subfamily of Scolytide. 435 
distinguishable from the rest, except with a strong light; apex 
rather abruptly declivous, subconvex, striate, the strie after the first 
two being obliterated below the flexure, the interstices in the male 
shortly carinate at the flexure, the alternate ones more strongly, 
7th toothed, forming lateral tooth of elytron; declivity with six or 
seven tubercles on 1st, three or four on 2nd interstice in both sexes. 
Under side piceous, with mesosternum lighter, pubescent and 
punctured, strongly on prosternum and abdominal segments, 
these nearly equal in length. Legs and antenne testaceous 
brown, club of latter darker. Middle and posterior tibiz with 
outer border angulate in middle; tarsal joints not strongly com- 
pressed. 
The antennal hairs of the male are all either serrate 
for their whole length or thickened at their tips, par- 
ticularly those of the inner angle and base of the club, 
which end in variously formed flattened processes, re- 
minding one of golf-clubs or antennz of butterflies ; these 
processes are covered with fine aciculations, and the long 
cilia display the same thickening, but less conspicuously. 
Serration is visible on the hairs of S. tycon 3, but there 
is no clubbing. The antenna, when extended, either 
assumes a position with the club vertical, and its inner 
edge below, or is turned completely round so that the 
lower surface of the club becomes uppermost. I do not 
know which position is assumed in life, or whether the 
torsion takes place at the junction of the scape with the 
head, or of the funiculus with the scape, as I have not 
been able to separate the antenna from the head of a 
unique specimen ; but I think the latter is correct. I 
have described the external and internal borders in 
accordance with their morphological position, not that 
assumed by the inverted antenna. 
At the anterior angles of the prosternal process in the 
male two small colourless chitinous processes project 
forwards and outwards; they are below the level of the 
prosternum, but are attached to the true anterior ventral 
border of the prothorax, which is here split, or really in- 
folded so as to form a small flat recess lying internally 
to the prosternal process. This recess is probably sepa- 
rated from the inside of the thorax by a thin membrane, 
but it is impossible to see it. This peculiar structure 
will be made more intelligible by a reference to the de- 
scription of the male prothorax in S. mikado. The lateral 
fovee are larger and more distinct than in S. tycon. 
