vures fuscous, broadly but faintly margined with 

 yellowish-brown, as well as the inner edge : 

 tergum dark chesnut-blue, thickly covered by 

 golden-yellow, silky hair : anus black, naked : 

 venter black-brown, nearly glabrous, with a few 

 whitish hairs, the segments pale on their poste- 

 rior margins : abdomen cylindrical, depressed. 

 Length four-fifths of an inch. 



OBSERVATIONS. 



The nervures of the wings are arranged like 

 those of L. ephippium, Fabr. Meig. It is an in- 

 habitant of the United States generally. 



Lower left figure. 



LAPHRIA DORSATA. 



SPECIFIC CHARACTER. 



Blue-black ; head and feet with cinereous hair ; 

 nervures of the wings widely margined with 

 fuscous. 



PLATE VI. 



