PINE BARK-BEETLES. 
713 
41. The southern tomicus. 
Tomicus cacographus Le Coute. 
Injuring the pines of North Carolina and southward even more than T. pini in the 
north ; a very similar beetle, with similar habits. 
This is the Bostrichus pini of Ziminermann, but not the one so named 
by Say. It inhabits, according to Le Coute, the Southern and Western 
States. It is said by Le Coute to be similar to Tomicus calligraphus, 
but is usually of smaller size (3.5 to 4 lnm , .14 to .16 inch)^ the cusp of 
the secoud interspace is very small, and that of the third is wanting • 
that of the fifth is compressed and scarcely more prominent than that 
of the fourth interspace, and is somewhat connected with it; there are 
but two teeth between the tooth of the fifth interspace and the terminal 
acutely elevated margin, and these teeth are all of them less prominent 
than in T. calligraphus in some specimens (male), but equally prominent 
iu others (female), though less acute than in T. calligraphus. The inter- 
spaces from the third outward are marked each with a regular series 
of punctures behind the middle, whereby it differs 
from the next species (T. confusus Le Coute, of south- 
ern California and Arizona). The club of the antennae 
is quite similar to that of T. calligraphus* 
The mine made by this species has been found under 
the bark of the southern pine at Atlanta, Ga., the 
beetle from it having been labeled by Dr. Horn. 
The mine is like that of C. calligraphus, but the 
main burrow is narrower, being 2J mm wide, and the 
holes are smaller, the beetle itself being smaller. 
Living beetles were taken from the mine March 28, 
1881. 
Fig. 246.— Tom icus ca- 
cographus.— M^ltx del. 
' 
42. The pine bark-beetle. 
Tomicus pini Say. 
From a common center excavating several broad shortish galleries lengthwise of 
the trunk in opposite directions, resembling the spread fingers of a hand, a bark- 
beetle very similar to the preceding, but of smaller size, measuring only .15 in length, 
and with but four small teeth on each side of the concave declivity at the tips of its 
wing-covers, and usually showing more or less distinctly an impressed line along the 
middle of the hind part of its thorax. (Fitch.) 
"The tracks formed by this insect are so different from those of the 
other species that they are recognized at a glance. They occur under 
the bark of old trees of the white pine, and have some resemblance to 
* A number of other Scolytids which probably infest the pine are described by Le 
Conte in his work on the Rhynchophora of America north of Mexico, where all the 
species are characterized, and to which the reader is referred. 
