SYRPHUS POLITUS. 



SPECIFIC CHARACTER. 



Thorax with a yellow line each side, and a 

 cinereous dorsal one ; tergum with yellow hands 

 and quadrate spots. 



SYNONYM. 



Scjeva polita. Nobis. Journ. Acad. Nat. Sci- 

 ences, vol. iii. p. 88. 



DESCRIPTION. 



Head yellow, above the antennae dusky sil- 

 very: thorax somewhat olivaceous, a yellow line 

 above the wings, and a dorsal cinereous one: 

 scutel dusky yellowish, with a paler margin : feet 

 whitish : tergum black ; basal segment with the 

 basal and lateral edges yellow; second segment 

 with a transverse yellow band on the middle ; 

 third and fourth segments with a band and lon- 

 gitudinal line, each side of which latter is a 

 large, transverse, subtriangular spot, yellow ; 



PLATE XI. 



