326 CLASS viii. 



Sp. Conops flavipes L., DUMR. Consid. ggn. . I. Ins. PI. 46, fig. 4, PANZER 

 Deutschl. Ins., Heft 73, Tabs. 21, 22, &c. 



Phalanx III. Proboscis distinct, bilabiate at apex. Four I 

 setae of haustellum, an upper (labrum) fornicate, emarginate at the [ 

 extremity, two lateral (maxillce) linear, supplied with a palp j 

 incrassated towards the extremity. Syrphidce. 



These diptera, which for the most part were placed by LINN^US 

 in his genus Musca , form the genus Syrphus FABR., and numerous 

 small genera of more modern writers. 



A. Antennae of the length of the head, or longer than the head, 

 t Antennce with apical style. 



Ceria FABR. Antennae inserted on a common frontal pedicle. 

 Abdomen cylindrical. 



Callicera MEIG., LATE. Antennse inserted on a common 

 tubercle. Abdomen conical. 



tt Antennae with dorsal seta. 



Psarus LATR., FABR., MEIG. Antennae inserted on a common 

 frontal pedicle. 



Chrysotoxum MEIG., LATR. Antennae inserted on a conical 

 frontal tubercle. Scutellum unarmed. Wings divaricate. 



Sp. Chrysotoxum arcuatum, Musca arcuata L., GuiaRiN Iconogr., Ins. PI. 99, 

 figs. 6, &c. 



Ceratophya WIEDEM. 



Microdon MEIG., Aphritis LATR. Antennae inserted on a small 

 frontal tubercle, little distinct, with first joint elongate, cylindrical. 

 Scutellum bidentate. 



Sp. Microd. apiformis, Musca apiformis DE GEER, GURIN Iconogr. Ins. 

 PI. 100, fig. i ; Micr. mutabilis, Musca mutabilis auctor. (in part) ; the 

 larva of this species is, according to the investigations of SCHLOTHAUSER, the 

 same animal which VON SPIX and VON HEIJDEN have described as a slug, 

 under the name of Scutelligera and Parmula, OKEN's/m, 1840, s. 922, 923. 



Paragus LATR., METG. Antennae inserted on the frons, approxi- 

 mate, of the length of the head. Abdomen elongato-quadrate, 

 depressed. Wings parallel, incumbent. 



Sp. Paragus bicolor, Syrphus bicolor FABR., GU^RIN, Iconogr. Ins. PI. 99, 

 figs. 5, &c. 



