163 
Colohothea is so great that no one who examines them can be- 
lieve both to be adapted to the corresponding organs of the 
females of each form. At the same time I have no doubt that, 
were it not for the great difference between these organs in our 
two forms, no entomologist would doubt their being mere local 
varieties of one and the same stock. Scores of other local varie- 
ties occur in the same countries, presenting all the successive 
steps of segregation, from the most partial variation to the full- 
formed local race. 
Thus we have only to admit that species disseminate them- 
selves over wide areas, and adjust themselves to the diversities 
of local conditions, or, in other words, segregate local varieties, 
to open the way towards an explanation of the way in which 
the world has become peopled by its myriads of species. The 
inevitable law of Natural Selection which governs the general 
process of the adjustment of the local races to new conditions 
will explain the changes of conditions of life in time ; and the 
laws of variation, diversified in details as are the species them- 
selves, will explain the rest. 
21. Colohothea hisignataj n. sp. 
C, modice elongata, fusca ; thorace vittis novem cinereis ; elytris 
maculis parvis subconfluentibus cinereis, relicto spatio medio fusco 
maculam magnam albam includente. Long. 5 lin. d $ . 
Head rusty brown, streaked with ashy, vertex with two ashy 
lines divergent towards the occiput. Antennae rusty brown, 
tips of joints blackish, bases of alternate joints whitish. Thorax 
with nine ashy longitudinal lines, the central one the slenderest, 
the second (from the central one) not reaching the hind margin, 
and the two lateral ones on each side very oblique. Elytra 
moderately short and tapering, apex sinuate-truncate, external 
angle produced into a long tooth ; dark purplish brown, sprin- 
kled near the base and apex with ashy dots, which unite here 
and there in irregular strigse ; the central space clear, and having 
in the middle of each elytron a large round white spot ; there is 
also a small white spot on the suture near the scutellum. Body 
beneath clothed with dingy-ashy pile ; abdomen spotted with 
black. Legs purplish brown, ringed with ashy. 
^ $ . Terminal abdominal segment similar in form in the 
two sexes, longer and tapering in the female ; the ventral plate 
in both truncated, with angles simply acute ; the dorsal plate 
distinctly notched in the middle of its apex in the female, obtuse 
in the male. Tarsi simple in the male. 
A common insect on dead branches, &c., at Ega. 
r2 
