so 



FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 



20. Tijpocerus zehratus Fabr. 



This pretty beetle mines the white oak. 

 by the accompany iug figure. The body 

 is black-brown, with reddish antennae 

 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°^'". 



21. The oak-bark weevil. 



Magdalis olyra (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, aim adult of tbe oak- 

 bark weevil. After Emertou. 



Fig. 30. —Track made by Magdalis olyra, or 

 a longicorn 1 After Enierton. 



tree, as numerous individuals of the beetle occurred in different stages 

 of growth and no other weevils or Scolytidae 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 iu an opening in the bark; when the larvae hatched 



Mr. F. H. Chittenden writes that it may be the mine of another beetle. 



