Missouri, whilst engaged in the exploring expe- 

 dition under the command of Major Long. 



The upper figure. 



TREMEX OBSOLETUS. 



SPECIFIC CHARACTER. 



Ferruginous ; tergum black. 



SYNONYM. 



Tremex OBSOLETUS. NoMs. Western Quar- 

 terly Reporter^ vol. ii. p. 73. 



DESCRIPTION. 



Body ferruginous, punctured : head with three 

 obsolete indented lines upon the vertex, and a 

 transverse one between the eyes: antennse, pale 

 ferruginous : thorax scabrous before, with a black 

 spot on each side of the disk : wings yellowish- 

 brown, hyaline: carpus rufous: posterior tibiae, 

 and tarsi^ black at their tips: tergum black, 



PLATE xxxii. 



