80 
FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 
20. Ti/pocerua zebratu-s Fabr. 
This pretty beetle mines the white oak. 
by the accompanying figure. The body- 
is black- brown, with reddish antenna* 
and legs, and four yellow cross-bars on 
each wing cover; that on the base much 
curved, while the fourth is straight. — 
Length, 12 to 14 mm . 
21. The oak-hark weevil. 
Matjdalis ohjra (Herbst). 
Order Coleuptera; Family Curculionid^:. 
Boring under the bark of the oak, probably after 
it has been loosened by the flat-headed borers, a 
curved, fat, footless grub, with the head freer from 
the body than in the larval pine weevil ; occurring 
in all stages under the bark in May, and possibly 
producing a radiating track, as in Fig. 30; trans- 
forming into a black weevil, with the surface of 
the body punctured, the thorax with a lateral 
sharp tubercle on the front edge, while the tarsi 
are reddish brown, with whitish hairs. 
Fig. 30 represents the mines possibly 
made by this weevil.* The original speci- 
men of the bark was taken from the same 
It may be easily recognized 
Fig. 29.— a, larva ; b, pupa, ana adult of the oak- 
bark weevil. After Eraertou. 
Fig. 30.— Track made by Magdalis ohjra, or 
a longicorn I After Emerton. 
tree, as numerous individuals of the beetle occurred in different stages 
of growth and no other weevils or Scolytidre were present. The beetle 
which makes the burrow may have been a weevil from the shape of the 
burrow, which is long, narrow, and deep, being about four inches long. 
It will be seen by reference to the illustration that the parent beetle laid 
at least seven eggs in an opening in the bark ; when the larva± hatched 
Mr. P. H. Chittenden writes that it may be the mine of another beetle. 
