CONOPID7K. 



91 



7. Hind femora with a projoction Ijclow : 



Senogaster, 2, 0. 

 Spilomyia, 4. 

 Polydontomyia, 2, 10. 



8. Eyes pubescent : 



Sj'rphus, Jit. 

 Microdon, pt. 4. 

 Meganietapon, 14. 

 Mallota, pt. 2, 10. 

 Pipiza, 4. 

 Leucozona. 

 Eristalis, pt. 1, 4. 

 Copestylum, 1, 4, 5. 

 Clirvsoclilaniys. 



Tropidia, 2. 

 Milesia, 1, 2. 



Didea, pt. 2. 

 Cliilosia, pt. 5. 

 Clirysotoxuni, 4. 

 Psilota. 

 Paragus, 4. 

 Catabomba. 

 Volucella, pt. 1, 4, 5. 

 I'riomerus, 2. 1. 



0. Abdomen spatulate or narrowed conspicuously at the base : 



Spiiyximorpha, 4. 



Rhopalosyrphus, 3, 4. 



Senogaster, 2, 7. 



Bacclia. 



Spegina. 



Ceria. 



10. Males dichoptic: 

 Pelecocera. 



Rhopalosyrphus, o, 4, 0. 

 Mixogaster, 3, 4, 0. 

 Omegasyrphus, 3, 4. 

 Ubristes, 3, 4. 

 Microdon, 3, 4, 8. 

 Clialcoiiivia. 



Mixogaster, 4, 3. 

 Ceriogaster, 1, 2. 

 Salpingogaster, 2. 

 I>acchina. 

 Xeoascia. 



Meganietapon, 1, 4, 5, 8. 

 Asemosy^hus, 2. 

 Ilelophilus, 2. 

 Mallota, pt. 2, 8. 

 Polydontomyia, 2, 7. 

 Chaniosyrplius. 



29. CONOriD.^^:. 



Thinly pilose or nearly bare, more or less elongated species. 

 Head broad; front broad in both sexes; ocelli present or 

 absent. Antennae porrect, composed of three simple joints, 

 the third with a dorsal arista or terminal style. Oral opening 

 large; proboscis slender. Abdomen more or less elongated,' 

 often constricted toward the base. Basal cells of wing usually 

 large, the third (anal) closed; three posterior cells, the first 

 closed or mnch narrowed; no spurious vein. 



