1878.] 59 [Hagen. 
given again, if both are not climatic varieties. I do not know if the 
larva of A. thoracicus is known ; those of A. pimpinelle before me, 
and as described by Cornelius, belong to the same type as A. scro- 
phularie. | 
Of the other museum pests, Pinus fur is very rare, and I have 
found this species only two or three times in the collection, probably 
imported with insects from Europe, where it is the most common and 
dangerous pest. 
Besides these beetles, I made the acquaintance of a pest which I 
at first entirely underrated, namely, Z’ribolium ferrugineum. The 
species is cosmopolitan, and as I never heard of damage done by it, 
I did not at once give it much attention. It was imported several 
times with large collections of insects from the East Indies. The 
flat body of the larva, as well as of the beetle, make it particularly 
fit to enter boxes through the smallest crack. As the collections 
were exceedingly large, it was impossible to take care of them in- . 
mediately in a thorough manner, and I observed an alarming increase 
of the insect. It was rather difficult to overcome, but I suceeeded 
by incessant care, partly by throwing away the worst infested in- 
sects, partly by killing individuals which I forced to come out of the 
body of specimens by filling the whole box with tobacco smoke. I 
saw the beetles and larve running out when the smoke began to fill 
the box, then I closed the box for an hour or two, when I found 
them all dead. With Tribolinus there was imported another cosmop- 
olite, Sylvanus surinamensis. Iwas informed by Dr. LeConte that 
it is a beneficial insect and feeds upon Tribolium. 
Westwood, in his Introduction, says that he has observed T'ribo- 
lium ferrugineum infesting insects imported from East India. It is 
remarkable that this cosmopolite seems to assume injurious habits 
only there. 
The most annoying pest I have had to do with in late years is the 
common clothes moth, Tinea (Oecophora) flavifrontella. I am not 
prepared to state if this species is certainly the 7. flavifrontella of 
Europe, as I have no typical specimens before me, and confess to be 
somewhat in doubt about the determination. The name is used in 
the last edition of Harris, and by Dr. Packard, for this very common 
and injurious insect. I first made its acquaintance in the collection 
in the new work room, which was used before for storing skins of 
mammals and birds, and birds’ nests, and of course harbored plenty 
of moths. As there are large cabinets attached to the wall, it was 
