OAK-BORERS. 



7» 



"The markings are very variable, but the yellow, wavy Hue running from th© 

 suture and forming the included mark seems to be constant and peculiar to the species. 

 (Leng.) 



17. Smodicum cucu.tiforme (Say). 

 Order Coleoptera ; Family Cerambycid^. 



This insect bores ia the larval stage under the dry barli of the live- 

 oak (Florida), of the beech in Michigan, aud of the hackberry in Texas. 

 (E. A. Schwarz.) 



18. The horn-tailed borer, or pigeox tremex. 



Tremex columha 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 Cerambycid^. 



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 dasystonms. After Horn. 



Fig. 28.— Typocerua zebratus. Smith, del. 



Beetle. — Mandibles nearly horizontal, prolonged in the male; sutural angle of elytra 

 spiniform iu both sexes; the metathoracic episterna, with the inner outline straight; 

 the gent© emarginate. Length, 30 to SO""" (1.25 to 2 inches). (Horn.) 



