OAK-BORERS. 
79 
"The markings are very variable, but the yellow, wavy line running from the 
suture and forming the included mark seems to be constant and peculiar to the species. 
(Leng.) 
17. Smodicum cucujiforme (Say). 
Order Coleoptera ; Family Ceram BYCiDiE. 
This insect bores in the larval stage under the dry bark of the live- 
oak (Florida), of the beech in Michigan, and of the hackberry in Texas, 
(E. A. Schwarz.) 
18. The horn-tailed borer, or pigeon tremex. 
Tremex columba Linn. 
Order Hymenoptera; Family Urocerid.e. 
This insect is known to infest the oak, but oftener bores into the 
maple, under which head the insect will be described. 
19. Mallodon dasystomus (Say). 
Order Coleoptera; Family Cerambycidje. 
This insect bores in the live-oak, hackberry, pecan; attacking trees 
in healthy condition, and often greatly injuring them, but preferring 
trees which have already suffered from some cause. The beetle issues 
from April till August in Florida and Texas. (E. A. Schwarz.) 
Fig. 27.— Mallodon dasystomus. After Horn. 
Fig. 28.— Typocerus zebratus. Smith, del. 
Beetle. — Mandibles nearly horizontal, prolonged in the male; sutural angle of elytra 
spiniform in both sexes ; the metathoracic episterna, with the inner outline straight; 
the gense emarginate. Length, 30 to 50 mm (1.25 to 2 inches). (Horn.) 
