HETEROMEROUS BARK-BEETLES. 
117 
[Fig. 54.] 
Dendroid ks canadensis, Latr. : — a , larva ; b, pu 
pa; c, beetle (female) ; d, enlarged anal horns; e, 
enlarged head of larva ; /, antenna of male magni- 
fied — after lliley. 
froy, a word which means flame col- 
ored, and which was obviously sug- 
gested by the prevalence of red or 
yellow in their coloration ; some of 
the foreign ‘species being almost 
wholly red. An example of the lar- 
vse is exhibited in the accompanying 
figure of the larva of Dendroides. 
These larvae are found under the bark 
of decayed trees and stumps, and 
are supposed to be lignivorous. 
The following are the three principal genera : 
A. Autenmo tlabellate or pectinate. 
B. Eyes very large, nearly contiguous Dendroides, 4 sp. 
B. B. Ej’es moderate and distant Pyrochroa, 2. 
A. A. Antonme simple Pkdilus, 14. 
The Pyrochroa flabellata, Fab., is from five to six-tenths of an inch 
in length, of an elongated and somewhat flattened form with parallel 
sides. The head and thorax are yellow, and the elytra blue-black. 
The Denroides canadensis, Latr. (Fig. 54) is somewhat similar but a little 
smaller and the elytra are of a dull or brownish-black color. Both of 
these insects are rather common about decayed trees, under the bark 
of which the larvm reside. The antenme are tlabellate iu the males, 
and pectinate in the females. The species of Pedilus are mostly between 
two and three-tentlis of an inch iu length, and usually exhibit the red- 
dish thorax and black elytra, so characteristic of the family. 
Family XLVII. R1IIPIPIIORID-E. 
This is a small family the species of which are distinguished by hav- 
ing the elytra usually shorter than the abdomen, and somewhat nar- 
rowed and separated from each other behind, the thorax is narrowed 
in front, but as wide at base as the elytra, in which they differ 
from all the other Traclielides except the Mordellidie, with which they 
are united by some authors. But the different habits of the larvae con- 
firm the propriety of their separation. The perfect insects are found on 
flowers. The larvae are parasitic in the nests of wasps, and a foreign 
species is known to infest the bodies of cockroaches. 
Twenty-two N. A. species have been described. 
Family XLVIII. STYLOPIDAl. 
A family of minute insects of so anomalous a character that it is very 
difficult to determine their proper location in the natural system. But 
few species are known, all of which are parasitic in the bodies of bees. 
Five genera have been described, two of which have boon found iu N. 
