Cerambycid larvae (fig. 52) are distinguished by a few promi- 
nent characters. They are always fleshy, thin-skinned, white or 
yellowish in color, and more or less cylindrical or depressed in 
form. In some species, the body tapers somewhat posteriorally, 
but the anterior segments are never suddenly and conspicuously 
larger than the following ones. The body is never curved and 
there are no prolegs or gripping processes on the last addominal 
segment. There are two overlapping, circular bands of skin be- 
tween each pair of body segments, the ventral mouth parts are 
always about on a line with the base of the mandibles, and the 
tenth abdominal segment is modified into two or three small re- 
tractile lobes (164, 165). 
Keys to Cerambycid Larvae 
Cerambycid larvae can be conveniently grouped as follows: 
I. Girdlers of twigs or stems. 
II. Gall formers on living plants. 
III. Borers in the bark of living plants. 
IV. Borers under the bark or in the wood of living trees. 
V. Borers in the roots of living plants. 
VI. Borers under the bark or in the wood of recently dead, 
dying, or felled trees. 
VII. Borers in older, moist wood in contact with the ground. 
VIII. Borers in dry, seasoned wood or in cat faces and scars on 
living trees. 
I. TWIG AND STEM GIRDLERS. 
Many species of cerambycids sever small twigs or branches 
from living trees. These twigs may be seen hanging in the tree or 
lying on the ground in late summer, fall, or winter. They are cut 
either by the adult or the larva, the adult cutting from the outside 
inward and the larvae from the inside outward. 
1. Twigs or stems girdled from the outside. Stem never 
hollowed out at point of severance 2 
Twigs girdled from within. Part of stem always. hollow 8 
2. Egg punctures and feeding scars on twigs or stems. 
Severed twigs containing larvae .............. Oncideres spp. 
No evidence of egg punctures or feeding scars. Severed 
twigs never containing larvae ................... Oberea spp. 
Se seomveerOund In PIrdled POLTION: 2) fe teeta 4 
Larvae found in green portion of twig ee on plant. 
Holes through bark of girdled portion .......... Hl 
4. Twigs girdled by spiral cuts. Without holes in bark of : 
TENRAIGR hs 4 Silaminacle Bee RA a MMR A HEMET ee en a Ec a oc OR ee 
Twigs severed by complete hollowing. Holes through bark 
MMeAnStbaAlOMe ING. eck Fc mere ate eee ax 6 
5. Two ocelli on each side of head of larva; pronotum euhite 
PATNA SOINLING os ee SSR RRO REA COE Elaphidionoides villosus 
One ocellus on each side of head; pronotum brown and 
CIV CU Vass ele he Pere elit lind Xylotrechus quadrimaculatus 
6. Head of larva shining; pronotum wider than long 
Aneflormorpha subpubescens 
Luffa 
