INSECT ENEMIES OF EASTERN FORESTS 205: 
thorax often bear dorsal chitinizations or plates, which may be paired 
into two oval spots. i 
Temnochila virescens (F.) is a bright, iridescent, bluish-green beetle 
from 10 to 18 mm. in length, which feeds on bark beetles and wood 
borers beneath the bark and on scolytids crawling about the surface. 
It grasps and eats these beetles much as do certain clerids, but is a 
much less active insect. The larva (fig. 42) is likewise highly colored, 
usually with brownish or bluish shades, and the ninth abdominal seg- 
ment has a chitinous plate bearing a pair of recurved hooks. It is also 
predaceous, following behind broods in the bark-beetle galleries, where 
it devours both eggs and larvae. 
Tenebroides corticalis (Melsh.) and 7. dubia (Melsh.) are smaller 
black forms, predaceous under the bark of logs or bark-beetle-infested 
trees. 7. bimaculata (Melsh.) is predaceous on Agrilus in oak. 
Thymalus marginicollis Chev., Ostoma ferruginea (1.), and Calitys 
scabra Thunb. are found in woody fungi, but the larvae of Ostoma 
may be predaceous. ‘The beetles are more oval in shape than 7'ene- 
broides. Corticotomus (Nemosoma) cylindricus (Lec.) (fig. 42) and 
Airora (Alindria) cylindrica (Serv.) (fig. 42) are common predators 
on the larvae of ambrosia beetles and cossonids in the wood of dead 
trees. ‘The elongate, cylindrical form of the larvae permits them to 
follow into the burrows of these insects. 
Famiry MALACHITDAE 
The Soft-Winged Flower Beetles 
The larvae of certain malachiid beetles, some of which are predace- 
ous, are found under the bark of dead trees and in the wood of branches, 
where they prey on bark beetles and wood-boring larvae. Anatomi- 
cally they can scarcely be separated from the Cleridae and some of the 
Dermestidae, but the common forms have bright-colored orange or 
yellow bodies, with contrastingly colored head and caudal segments. 
They are often clothed with velvety pubescence, and the larvae are 
mostly slow-moving and inactive. Species of Afalachius (fig. 42), 
Dasytes, and Anthocomus are commonly associated with bark and 
wood borers. 
Famity LAMPYRIDAE and Retatep Forms 
The Glowworms and Fireflies 
Several closely related families of beetles, Lyctdae, Lampyridae, 
Phengodidae, and Cantharidae are remarkable because of the luminous 
powers of many of the larvae and some adults. The common fireflies 
belong to this group. Many of the larvae have mouth parts adapted 
to sucking the juices of plants or small insects and snails. Most of 
the adults are predaceous, and some are voracious feeders on plant lice. 
They are moderate-sized, elongate, often flattened, soft-bodied beetles 
with flexible, often spreading elytra. The thorax projects at the mar- 
gins, and the legs are slender with 5-jointed tarsi, the fourth somewhat 
bilobed. 
The larvae of this group are extremely variable in form, some being 
elongate-cylindrical; others broadly oval, depressed forms, often 
covered with a dense pubescence or margined with chitinized keeled 
plates and with well-developed legs and bodies fitted for slowly crawl- 
