PINE BORERS. 
697 
24. The commixed leptostylus. 
Leptostylus commixtus Haldeman. 
Order Coleoptera ; family Cerambycld.e. 
A small long-horned beetle occurring on the leaves of 
the pine in July, its appearance and shape closely like 
that of the prickly Leptostylus, and its larva proba- 
bly having similar habits and the same form ; the 
beetle 0.25 to 0.36 long, its thorax closely punctured, 
blackish obscurely varied with ash-gray and with 
elevated black dots placed symmetrically, the sides 
convex and with a small angular tooth back of their 
middle ; its wing-covers coarsely and closely punct- 
ured, dull and gray varied with paler gray and with 
black clouds and dots, two faintly elevated ribs on 
each wing-cover of a slightly paler gray tint alter- 
nated with black dots, the inner rib having an elon- 
gated black spot near its base, another beyond the 
middle, and a third one farther back, formed by ob- 
scure dusky transverse clouds which cross the ribs at 
these places ; the sides black, alternated with a whit- 
ish cloud-like spot near the base, and a smaller one 
near the middle. (Fitch.) 
25. The lesser pine-borer. 
Asemum mcestum FTaklenian. 
Fig. 233.— Leptostylus commix- 
tus.— Smith del. 
(Larva, PL xix, Fig. 1.) 
Order Coleoptera ; family Cerambycid^e. 
Perforating the trunk of the white pine in all directions and sinking into the'heart 
of the tree, making a flattened cylindrical hole or mine when seen in outline ; a rather 
small larva, which emerges late in May through oval holes in the bark, especially 
around the base of the trunk ; the beetle blackish brown with short antennae and 
The transformations of this common borer, which apparently attacks 
the tree in health as well as in disease, like the species of MonohammuSj 
were first briefly described and figured in our " Guide to the Study of 
Insects" from specimens found in all stages under the bark of the oak 
early in May at Salem, Mass. I have also received a larva of this 
species from Dr. Shimer, which was found by him boring in the grape- 
vine. Since then Mr. Riley has bred it from the Scotch pine, and Mr. 
Schwarz has found the pupa under the bark of pine stumps in Florida 
in March. During the past May I have found, in company with Mr. 
Calder, at Providence, the perfect beetles, and also the pupa in deep 
burrows or mines in white-pine stumps. I have heretofore regarded 
