When an old house borer infestation is discovered, two types of remedial action 
are necessary: (1) repairing or correcting serious structural defects, and (2) control- 
ling the remaining insects present in wood left in place (S70, 87/, 1305). 
Chlorophorus annularis (F.) has been recovered from infested, imported bamboo 
at several locations in this country, and it may be established here. The adult is 
blackish, with green markings on the thorax and a yellow, X-shaped mark on the 
elytra, and is about 10 mm long. The first two pairs of legs and the inner parts of the 
antennae are red. Well-seasoned bamboo is mined extensively, and the mines are 
tightly packed with fine, powdery frass. This species is a serious pest of bamboo in 
India and Japan. 
Superfamily Curculidnoidea 
Snout Beetles 
Snout beetles are a morphologically distinct group in the order Coleoptera that 
were formerly placed in a suborder, Rhyncophora. Adults of this superfamily have 
the area in front of the eyes elongated to form a rostrum or snout. But there 1s much 
variation in the extension of the area. In one family, the Scolytidae, the area is only 
slightly extended and might go unrecognized. The mandibles are at the end of the 
snout. In addition to the snout, these beetles, with a few exceptions, are dis- 
tinguished by having the gular sutures united on the median line; the palpi are short, 
conical, and rigid. The labrum is absent. 
The larvae have large sclerotized heads. The body 1s light colored and soft with 
conspicuous transverse folds or ridges in both the thoracic and abdominal seg- 
ments. They are legless. When removed from their galleries (the larvae of most of 
the species in the superfamily are borers), they assume a characteristic C-shaped 
posture. Many of our most destructive forest insects belong to this superfamily. In 
the United States, 90 percent of all tree mortality is caused by insects; more than 60 
percent of this is caused by scolytids (1356). Flowers, fruit, and seeds are also 
destroyed by various species of snout beetles. Those species that do not kill trees 
often severely reduce the quality of the wood because they bore into the stem, thus 
producing crooked logs, or holes, or pitch pockets. Other species reduce the 
quantity of wood either directly or by reducing the vigor of the tree by eating roots, 
stem, branches, or leaves. 
Most of the species in this superfamily, both in terms of numbers and the amount 
of economic damage they produce, are found in two families: Curculionidae—the 
weevils—medium-size beetles with elongate snouts, no tibial spines, and the 
antennae inserted somewhere along the snout; and Scolytidae—the bark beetles— 
small, cylindrical beetles without a prominent snout, tibiae with spines, and 
antennae not much longer than the head. 
But there are many interesting weevils that belong to a number of much smaller 
families. Some of these families, such as the Anthribidae and Brentidae, have been 
recognized as families for a long time. Other families such as the Nemonychidae, 
Rhynchitidae, Attelabidae, and Rhynchophoridae, have been considered, until 
recently, subfamilies of the family Curculionidae. 
Family Anthribidae 
Fungus Weevils 
The fungus weevils are a relatively small family of about 90 species in North 
America. Few are economically important. Adults of this family have a clearly 
visible labrum that is not fused with the rostrum, which sets them apart from other 
families. Other distinguishing features are: visible and movable palpi, the pygidium 
is exposed, the third tarsal segment is bilobed and set into the apex of segment two, 
the antennae are not elbowed. 
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