AMERICAN ENTOMOLOGY. iO 



tenure black, four basal joints pale ferruginous, two terminal 

 joints fulvous : thorax ferruginous, sutures blackish : wings 

 blackish : carpus ferruginous : tergum deep black ; first seg- 

 ment with a small obsolete spot each side, yellow ; second seg- 

 ment yellow, with an inconspicuous longitudinal black line ; re- 

 maining segments with au oblong-triangular yellow spot on the 

 base of each ; terminal spine, and valves of the oviduct, ferrugin- 

 ous : pectus black, a large ferruginous spot beneath the anterior 

 wings: feet pale ferruginous; thighs above, and posterior pair 

 entirely, black : venter, with the segments slightly tinged with 

 piceous. 



Obs. The specimen above described, was taken on the bank of 

 the Missouri river. It inhabits many parts of the Union, and is 

 a very fine species. 



The right figure. 



PAXGONIA. Plate XXXIII. 



Generic character. Wings divaricated ; antennae porrect, ap- 

 proximate, three-jointed; first joint cylindrical, second cyathi- 

 form; third joint elongated, subulate, eight-ringed; proboscis 

 elongated, exscrted ; stcmmata three : abdomen of seven seg- 

 ments. 



Ohs. This genus is very closely allied to Tuhanus, the species 

 having a close resemblance to each other ; but, on accurate com- 

 parison, we shall agree with Latreille in the propriety of separat- 

 ing them. In fact, the Tabani hyg altogether destitute of the 

 stemmata, aud are very diff"erent from insects of the present 

 genus in several other characters, such as the form of their 

 antennae, the disposition of the nervures of their wings, and the 

 comparative length of their proboscis. In some of the species, 

 the stemmata are so small as to require a lens to discover them, 

 but they certainly exist in all. Six species are described by 

 Meigen as inhabiting Europe ; and five extra Europeans are de- 

 scribed by Wiedemann. 



These insects are inhabitants of warm climates, and are said to 

 subsist upon the honey of flowers; but Meigen suspects that 

 their females feed on the blood of animals, like those of the spe- 

 cies of other genera in this family. 



Pangonia incisuralis. — Specijic character. Thorax dusty 



