Report of Entomologist. 
379 
The tiiokax has its first segment flattened and semi-circular with the sides strongly 
inclined downward, and in the female so much deflected, that when viewed from 
above this part appears square and as long as wide, with its opposite sides parallel 
and its anterior end convex. In its middle is a longitudinal ridge with an impressed 
line along its summit, and on each side is a raised line extending obliquely outward 
and forward, these elevations not reaching the basal edge, and in the female less 
prominent. The second and third segments are alike in size and form, similar in 
length to the first, but a third broader. The first and second segments are dark dingy 
brown, the third dull pale yellow. 
The abdomen is smooth and glossy, soft and flesh-like, of a pale dull yellow color. 
In the male its color is more dull and its substance more firm, its width the same as 
the thorax, its opposite sides parallel, scarcely narrowing toward the tip. In this sex 
it has eight segments, distinctly marked by an elevated line on their hind margins. 
The first segment is longest, and is narrowed on each side concavely from its base to 
its middle, and from thence widens to its hind angles. Its surface is uneven from 
large smooth elevations and intervening depressions, a largo roundish elevation occu¬ 
pying its central and anterior part, and on each side of this a smaller and somewhat 
triangular one occupying the anterior corners. The second segment is short, less 
than half the length of the first, and on each side widens from its anterior to its hind 
angles. The four succeeding segments are larger, equal in size, each about twice the 
length of the second. The seventh segment is shorter, and the eighth still shorter, 
the two together being only equal in length to the sixth. The last one is followed 
by a triangular plate or ninth segment, which is transverse, nearly double the length 
of the short eighth segment, but not equaling it in width, with its apex rounded; 
and from under its edge is protruded two narrow triangular appendages, flattened 
and membranous, about 0.03 long, gradually tapering to a very acute point, and over¬ 
hanging the angle formed at the inner base of the forceps. 
Th e forceps are hard and horny, project horizontally backward, and are regularly 
curved, each blade in the form of a slightly bent bow. The blades are each com¬ 
posed of two pieces articulated one to the end of the other. The basal piece is 
double the length, and double the thickness of the apical. It is slightly thicker at 
its base, where it is articulated to the whole length of one side of the triangular 
plate, and to the outer end of the hind edge of the eighth segment. It is flattened 
its whole length, both on its upper and its under side, whereby it is more than twice 
as broad as thick. The apical piece at its tip is abruptly and strongly compressed, 
and widened to thrico its preceding thickness, and is concavely notched, this dilated 
portion having the form of a crescent, placed vertically, with its horns projecting 
obliquely backward and inward—this last joint of the forceps being thus analogous 
in its form to the top of the spire of a Turkish mosque, ending in a crescent placed 
transversely. The surface of these grappling organs is closely bearded with inclined 
hairs, which arc very short and minute on the first, and much longer and coarser on 
the last joint. 
In the female the abdomen is simple, narrower than the thorax, flattened, and 
beyond its middle gradually tapered to an acute point. It is composed of seven seg¬ 
ments, one less than in the male, all but the last corresponding in length with those 
of the male, and the basal one similarly sculptured. The seventh segment is of equal 
length with those forward of it, and like the sixth is strongly narrowed from its fore 
to its hind end, where it is transversely cut off, and from its end is protruded a cylin¬ 
drical tube, as it appears when viewed from above, which is twice as long as thick, 
and nearly the length of the segment to which it is appended. And from the end of 
