119 
females) had been reared from these pupae. In order to 
make a partial test of the longevity of the adult beetle, the 
last six specimens reared were kept under observation for four 
weeks, and later killed. This period could have been extended, 
as the beetles continued to exhibit considerable activity when 
emerging from the soil after dark. Their tendency during the 
night was to fight and mutilate each other, however, and it 
was deemed necessary to either kill them or have them ruined 
for specimens. During the period of observation, it was noticed 
that the beetles appeared above the coarse loam in the jar only 
after dark, and retired from one to two inches below immedi- 
ately at or before dawn. During their activity at night, efforts 
were repeatedly made to keep them under closer observation, 
using for this purpose the ordinary 40-watt electric lamp in 
ordinary household use. On every occasion, however, within 
three minutes of their exposure to light, the whole six speci- 
mens had “dug in” and would not reappear until after the jar 
had again been placed in the dark. Because of these nocturnal 
tendencies it was not possible to observe whether copulation 
took place during the period of their captivity. Most probably 
not, due to the unnatural conditions of their close confinement 
and to the exceptional activity previously referred to. 
A series of fifty-three specimens of this indigenous Ceram- 
bycid (including the eighteen examples reared above) collected 
on the Islands of Hawati, Kauai, and Oahu, at elevations from 
1500 to 4000 feet, have been studied and the genital organs 
dissected out by the writer from three males and one female 
from Kauai, two males and one female from Hawaii, and one 
male from Oahu. Although these dissections may, for ‘the 
present, be considered as a preliminary study, still, so far as 
can be seen at this time, the variations noticed by comparison 
of the genitalia of the “examples from each of the islands 
named, present nothing of real specific value. The same may 
be said more positively of the body characters. Although the 
mandibles and the lateral margins of the thorax are extremely 
variable in male examples from each island, there are inter- 
mediate forms which connect these extremes. This is quite 
noticeable both as to structure and sculpture in the eighteen 
reared specimens from Hawaii previously referred to. The 
