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leaf to get the resting moth. Of not less value is the larva of a Neu- 
ropterous insect, a Raphidia, which is present in numbers. Its long 
and flat structure together with its activeness enables it to hunt up any 
larva that may be present under bark or in crevices of the tree. 
Not only is the larva devoured but the chrysalis likewise, and with- 
out doubt often the mature moth. It was indeed very hard work to 
find any larve or pups of Carpocapsa upon trees where the larvee of 
Raphidia were present, and the latter occurred upon nearly every tree. 
As arule, not more two or three could be found upon one tree by break- 
ing off all the loose bark and examining the crevices, and often none at 
all. These larvee are always on the lookout for food, crawling up aud 
down the trees, but being chiefly concealed by the bark. Away from 
the trunk of the tree, however, more larve are found. An old and partly 
decayed stump or piece of wood lying anywhere near an infested tree will 
always be full of them; and, as has before been pointed out, many of 
the larvie of the first brood, at least, spin up in the dry ground. I will 
again refer to the Dermestid larve mentioned before, not only as de- 
stroying the pupa of Carpocapsa but likewise the larva, during the 
summer season at least. Many apparently sound cocoons when cut 
open will be shown to contain larve and skins of some of these beetles. 
The contents have been devoured while there is no visible hole in the 
cocoon, showing that the larva had entered while young. This alone 
would not be sufficient evidence, but I have also found small larvee of 
Trogoderma tarsale within the cocoons, and with the larve, dead and 
living, of Carpocapsa. 
In two instances the half dead Carpocapsa larvee showed small holes 
in their sides which had partly healed up. These no doubt were made , 
by the Dermestid larvie, which as a rule feed upon dry insect remains, 
and only kill living larvie gradually by feeding upon the skin only at 
first. In many cases they were found with larve that had recently 
died, having already undergone several molts within the cocoons of the 
last larvee. They are very abundant, especially around Alameda, as 
many as four or five large larvee being often found within the cocoon and 
feeding upon the dead pupa of Leucarctia acrewa. In almost any old 
egg-mass of Orgy.ia they are found. Whether they will feed upon the 
eggs or not I have as yet no evidence. Insect collections are not as 
much troubled by these beetles in California, especially in the valleys, 
as in the Eastern States. I have often observed them, however, to in- 
fest collections in the mountainous districts. A coleopterous (Clerid ”) 
larva was recently found in the Sonoma Valley feeding upon Carpo- 
capsa, but has not yet been bred. Numerous Carabid beetles were 
always found at the base of trees awaiting their chance to get a bite at 
the Carpocapsa larve. The most numerous of these were Pterostichus 
californicus Dej. and Calathus ruficollis Dej. A bright light with a 
white sheet below and behind was kept burning near the orchard in the 
Santa Cruz Mountains while the moths were abundant. One female 
