this genus, distinguished hy the want of spines at 

 the tail of the male. 



The upper figure represents the female, and 

 the lower left figure the male, hoth of the natu- 

 ral size. 



STIZUS UNICINCTUS. 



SPECIFIC CHARACTER. 



Black, opaque ; abdomen polished, with a ru- 

 fous band above ; wings dark violaceous. 



SYNONYM. 



Stizus UNICINCTUS. NoMs. Western Quarterly 

 Reporter^ vol. i. p. 77. 



observations. 



A broad, bright rufous band occupies the basal 

 half of the second segment of the tergum. The 

 wings are blackish-violaceous, and the anal spines 



PLATE II. c 



