SYRPHID.^. 2 5I 



references to such genera as may be doubtful to the nov- 

 ice. Nearly all the genera, and many of the species will 

 be found figured in the author's Synopsis. 



Several attempts have been made to subdivide the 

 family into sub-families, but no proposed plan has re- 

 ceived general approbation. I have recognized but three, 

 the Syrphinae, Eristalinae and Cerinae. Verrall in his 

 late attempt at classification has introduced several oth- 

 ers, but not always happily. I cannot approve of such 

 associations as Psarus, Callicera, Chrysotoxum and Spheco- 

 myia in the subfamily Chrysotoxince, distinguished chiefly 

 by the elongate antennae. Some species of Sphecomyia 

 have very short antennae, notwithstanding which they 

 show the closest relationship with the typical form. The 

 length of the antennae is always doubtfully a generic 

 character even, and certainly cannot be used as a distin- 

 guishing character for larger groups. 



Figs. 101, 102. Syrphidse. i, Microdon, sp. wing; 2, Chrysogaster 

 nitida, wing; 3, Chrysogaster nitida, antenna; 4 Chrysogaster nig- 

 ripes, antenna; 5, Paragus tibialis, wing; 6, Pipiza, sp., antenna; 7, 

 Paragus tibialis, antenna; 8, Chilosia, sp., wing(spurious vein omit- 

 ted). 9, Didea laxa, wing; 10, Didea laxa, antenna; 11, Salpingo- 

 gaster, sp.,wing; 12, Volucella, sp.. wing; 13, Voliicella, antenna; 14, 

 Copestylum marginatum, antenna; 15, Arctophila Jtagr a ns, wing; 16, 

 Sericomyia niilitaris, antenna, 17, Eristalis, sp., wing; 18, Helophi- 

 lus similis, wing; 19, Tropidia 'quadrata, hind leg; 20, JMilesia vir- 

 giniensis, hind leg; 21, Spilomyia longicornis, wing; 22, Spilomyia 

 longicornis, antenna; 23, Chrosotoxum, species, antenna; 24, 

 Sphvximorpha, sp., antenna; 25, Ferdinandea croesus, wing; 26, Volu- 

 cella fasciata; 27, A/yiolepta auricaudata; 28, Syritta pipiens; 29, 

 Xylota pigra; 30, Pipiza pulchella ; 31, Platycheirns hyperboreus; 

 32, Syrphus americanus; 33; Sericomyia militaris; 34, Pterallastes ' 

 {Triodonta) curvipes; 35, Scceva pyrastri; 36, Tropidia quadrata; 37, 

 Baccha lemur ; 38, Trichophthalmomyia, sp., 39, Baccha, sp.; 40, 

 Apophysophora, sp.; 41, Chrysotoxum, species. 



