292 MISC. PUBLICATION 657, U. S. DEPT. OF AGRICULTURE 
The flea weevils, Rhynchaenus spp., are somewhat important from a 
forestry point of view. They are found mostly on the poplars, willows, 
and birches. The adults eat holes in the leaves, and the larvae are leaf 
miners. They are rather broad weevils, with large eyes that almost 
meet in front, the antennae are elbowed, and the hind femora are very 
thick and fitted for jumping. The willow flea weevil (Rhynchaenus 
r iat Lec.) ) is at times very abundant on willow in the East accord- 
ing to } a (315). A closely related species of Rhynchaenus is com- 
mon on birch in northern Wisconsin, and in some stands paper birch 
has been weakened sufficiently from defoliation to allow successful 
attack by the bronze birch borer. 
SuspraMitry ATTELABINAE 
The Leaf-Rolling Weevils 
The leaf-rolling weevils are not very important from a forest insect 
viewpoint, but are discussed because of their rather peculiar habits. 
Some of the species roll leaves, depositing an egg in each roll, others 
deposit their eggs in young fruit, the kernel being eaten by the larvae, 
and still others place their eggs in buds, which are destroyed by the 
larvae. The oaks, walnuts, butternuts, hickories, sumacs, hazelnuts, 
and alders are all listed as hosts. Four species of Attel/abus, namely 
analis Ill., nigripes Lec., bipustulatus F., and rhois Boh., are found on 
oaks, walnuts, and That arsi@s from Canada to Florida. but they do little: 
damage. The females roll the leaves. These rolls are often hanging 
by a narrow strip of the leaf, and later fall to the ground. Blatchley 
and Leng (49) stated that the larvae chew the inner part of the rolls, 
and when mature, leave them and pupate in the ground. Hugnamptus 
collaris (F.) and other species of this genus are found on the leaves 
of various hardwoods. The rose curculio (Rhynchites bicolor (¥.) ) 
is probably the most important species 1n this family. The pine-flower 
snout beetles of the genera Cimberis (Rhinomacer) and Diodyrhyn- 
chus feed on the staminate flowers of various pines and other conifers 
from Canada to Florida. The eggs are laid in the flowers also. The 
adults of this family are small to medium-sized, very few being over 
5mm. in length. They are robust, and usually dull red or black. They 
have flat snouts, which are about as long as the thorax. 
SUBFAMILY COSSONINAE 
The Broed-Nosed Bark Weevils 
The adults of the subfamily Cossoninae are small, oblong or elongate, 
black or brown weevils, with eyes small, or sometimes lacking entirely. 
The beak is often short and broad at the apex. Several species of the 
genus Cossonus frequently inhabit the sapwood of hardwoods and 
conifers killed by bark beetles. @. bags essus Boh., a dull black species, 
is found in Florida, and @. corticola Say, a shining piceous or black 
species is found all over the eastern part of the U nited States. Both 
species are generally common beneath the bark of dying pine trees. 
C. platalea Say and C. impressifrons Boh. are commonly found be- 
neath the bark of various broadleaved trees. 
a 
