278 S. W. WILLISTON, M. D. 



5. Antennse light reddish yellow ; pile of the female front light yellow, except 



at the vertex ; no gray clouds in the marginal and submarginal cells. 



ttenia. 



Antennpe reddish brown ; pile of the female front black ; gray clouds in the 



marginal and submarginal cells podagra. 



6. Prescutellar thoracic band shining; abdomen more elongate 11. 



Prescutellar band opaque 7. 



7. Marginal cell widened before its end, a distinct curvature of the second 



vein into the submarginal cell ; frontal triangle with whitish pile ; mar- 

 ginal and submarginal cells without gray clouds 8. 



Marginal cell regular 9. 



8. Third abdominal segment opaque nigi'ipes. 



Third segment with a narrow shining cross-band ? rufiveutris. 



9. Front and frontal triangle with black pile 10. 



Frontal triangle and front (except on the upper part) light yellow pilose; 



shining band on the third segment entire ; gray clouds in the marginal 

 and submarginal cells vinetorum. 



10. The post-sutural black thoracic band crescentic in shape; scutcUum without 



black on the sides ? agroruni. 



The post-sutural baud not crescentic; sides of scutellum black; no gray 

 clouds in the marginal and submarginal cells sclii$>«taeeus n. sp. 



11. Second abdominalsegment without a posterior black band., volaticus n. sp. 

 Second segment with a posterior opaque black band 12. 



12. Legs black f scutellaris. 



i conicus. 

 Legs almost wholly reddish yellow priecipiius n. sp. 



13. Dorsum of thorax with opaque black markings on an ashy ground 14. 



Dorsum uniform or nearly so, in coloration 15. 



14. A single median black stripe parvuliisn. sp. 



A geminate median black stripe, in the shape of a tuning fork...f urcatus. 



15. Thorax black ; wings with a definite large brown spot. pygolaiupiis. 



Thorax dark reddish brown, with fulvous pile ; wings infuscate. 



obsoletus. 

 Thorax light ochraceous yellow ; wings hyaline ocbraceus n. sp. 



61. Eristalis pygolampus Wied. 



One male and two female specimens from Rio de Janeiro and 

 Chapada. The third joint of the antennae is reddish brown or 

 brownish red, larger in the female ; the yellow of the front is a very 

 small semi-circular spot above the immediate base of the antennae. 

 The suture shows no trace of white pollen, and the scutellum is deep 

 reddish brown. The third abdominal segments has a very narrow, 

 the fourth a broader, yellow hind margin. The tarsi are light yel- 

 lowish red throughout. The front of the female is rather narrow 

 above, with black pile ; the abdomen is nearly as in the riiale, the 

 shining spots on the second segment being partly confluent. 



