OP PHILADELPHIA. 355 



The nervures of the wings are arranged more like those of an 

 Asilus than of a Dasi/pogon, but the bi-articulate style proyes the 

 generic affinity. 



LAPHRIA. 



L. SANIOSA. — Black ; abdomen sanguineous. 



Inhabits Indiana. 



Body blued-black : head black ; front with a silvery reflection : 

 posterior and inferior orbits reflecting [159] silvery : wings 

 black violet : abdomen sanguineous, first segment of the tergum 

 blackish. 



Length nearly half an inch. 



RAMPHOMYIA Meig. 



R. RUFIROSTRA. — Black; thorax lineate. 



Inhabits Indiana. 



Body hairy, black : proboscis honey-yellow, black at base : 

 thorax blackish-cinereous, opake, with three polished, black, 

 equal lines obsolete behind, and two less obvious ones on each 

 side, connected to the exterior of the dorsal ones in a humeral 

 spot : wings with a yellowish tinge towards the base, and a large 

 fuscous carpal spot; middle cellule very short, but little longer 

 than broad : poisers honey-yellow, with a fuscous capitulum : 

 tergum polished: feet very hairy, polished; anterior tarsi, first 

 joint as long as the tibia and rather more dilated. 



Length 9 three-twentieths of an inch. 



SARGUS. 



S. TBiviTTATUS. — Green ; thorax [with] dull darker lines : 

 tergum fasciate. 



Inhabits Indiana. 



Body grass green, not metallic, nor brilliantly polished : an- 

 tennae terminal joint rounded, yellow; seta black: stemmata 

 equidistant, in a fuscous areola : thorax trilineate with dull red- 

 dish-brown : poisers blackish at tip : tergum, segments, except- 

 ing the [160] basal one, with a broad dusky band at their bases : 

 feet dull yellowish, darker at their tips. 



Length from two-fifths to half an inch. 



A large species, destitute of the highly polished metallic color 

 1829.] 



