82 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 
24. Thb pbeblb oak hokkk. 
Goet (Ubili8 (Leconte). 
Order Coi.kmi-tkka; Family Ckra.MBYCIDjE. 
A cylindrical long-horned beetle, which has recently been described 
by Dr. Leconte under the above name, is bo uniformly found upon 
white-oak trees in July and August that I doubt not its larva is a borer 
in the trunks of these trees, perforating the wood, probably, in a man- 
ner similar to that of the marked pine borer, and the worm resembling 
that in its appearance. This beetle is half au inch long and scarcely a 
third as broad, of a black color, its wing-covers chestnut red, its surface 
having a marbled appearance, produced by short prostrate hairs of a 
dull ocher-yellow color, except on the anterior half of the wing-covers, 
where they are gray, and are here followed by a tawny brown spot des- 
titute of these paler hairs. (Fitch.) For a figure aud further mention 
the reader is referred to Hickory Insects. 
25. Goes t'ujrinm (De Geer). 
This species, according to Adams Tolmau (Insect Life, i, 343), kk is 
commonly taken on the oak in Philadelphia." Mr. Tolman, however, 
does not specifically state that this borer lives in the oak; but we in- 
sert it under oak borers, as it may yet be found to infest the oak. It 
is figured aud noticed under Hickory Insects. 
26. The brown prioxi's. 
Orthosoma brnnneum (Forster). 
Order Coleoptera ; Family Cerambycid.e. 
The larvre of this beetle have been found in rotten oak and walnut 
stumps by Mr. George Hunt, near Providence, but as it is more com- 
monly met with in piue logs the reader is referred to the account of it 
given under piue insects. 
27. Unknown longicorn borer prom ax oak log. 
(PI. xxi, Fig. :3.) 
Larva. — Body of large size, gradually tapering to the penultimate segment, with 
three pairs of thoracic legs of moderate size. 
Head small and much rounded. Labium small and unusually narrow, well rounded 
on the front edge. Antennae conspicuous, unusually long; second joint very long 
and slender, longer than the basal one is thick ; third joint minute and acute at tip. 
Labium very small, squarish; subinentum and mentnm both rectangular, broader 
Than long; the ligula narrow, much rounded in front: labial palpi three-jointed; 
third joint obtuse, as long as the second. Maxillary lobe very broad and rather short, 
not reaching beyond the end of the second palpal joint. Maxillary palpi three-jointed : 
firs! joint very short and broad, second one-half as thick as the first, the third slender 
and a little longer than the second. Mandibles niuch rounded and entire at tip. 
