370 Annals Entomological Society of America [Vol. V, 
L. O. Howard (1904) in the extracts from correspondence 
gives the following note: ‘‘Dr. George S. Yingling, Tiffin, 
Ohio, sent to this office (U. 5. Dept. of Agric.) with accompany- 
ing letter dated May 30, 1903, a glass charm with sterling 
silver band, inclosing a common French beetle, frequently used 
as an ornament, together with larva of the cabinet beetle 
(T. tarsale) which was destroying it. By careful examination 
of the top of the charm it was seen that there was a crack large 
enough for the admission of the larva when it was young.”’ 
Another note, found in Insect Life (1894) is as follows: 
‘““Trogoderma tarsale (Melsh.). Breeding by thousands in 
silkworm cocoons in the U. 8S. Gov’t Bldg,, a well-known 
museum pest, probably identical with European species.”’ 
aot We EES TORN 
T. tarsale may be found in all stages of development through- 
out the year in well-heated buildings. Under favorable con- 
ditions such as are found in the average museum, with the 
ordinary room temperature and plenty of food, I have obtained 
two and a partial third generation in one year. Some of the 
specimens which hatched in January metamorphosed in June 
and some of their young in turn matured and laid eggs in 
October, thus giving rise to a third generation before the end 
of the year. 
The beetles usually pair on the day following their emergence 
from the pupal skins. The eggs, varying in number from as 
few as three to as many as sixty, are laid in convenient places 
from three to five days after copulation. The young larve 
hatch from ten to fourteen days later, the time depending 
largely on temperature. Under ordinary room temperature 
they hatch on the average in twelve days. The larve, almost 
immediately after hatching, begin to feed on the material at 
hand and, as a rule, do not wander unless the food is decidedly 
poor or scarce. Quite frequently a large number of them hatch 
in the same insect which had reared the parents and very 
seldom they desert it until it is almost completely devoured. 
In one case eighty-six larve hatched in the dry body of a 
May-beetle (Lachnosterna) in which the parents had completed 
their life history, and, although several other dried insects 
were present in the same small dish, they were not attacked 
until the May-beetle was almost completely devoured. The 
