SYNOPSES OF ZODION AND MYOPA WITH NOTES ON 

 OTHER CONOPIDiE. 



Nathan Banks. 



For several years I have been accumulating material in this 

 family, and the occasion of determining some western material 

 induces me to publish descriptions of certain new species and 

 to tabulate two of the genera, Myopa and Zodion, although the 

 table of the latter genus is rather unsatisfactory. 



These insects, hke most parasitic ones, are variable in size; 

 thus our two Eastern Occemyias cannot be separated by size as 

 has been stated, each of them having large and small spec- 

 imens. In the Myopinae several species are widely spread, thus 

 Myopa vesiculosa and Zodion fulvifrons occur in California as 

 well as the East, and Myopa pilosa which was described from 

 California is probably the same as our Eastern M. vicaria; ,also 

 Zodion pygmcEiim from California and Nebraska seems to agree 

 with our Eastern Z. nanellum, Myopa clausa I have from Utah, 

 and Zodion perlongum and Z. parvum described from New 

 Mexico and Arizona occur here in Virginia. Z. obliquefasciatum 

 is also widely distributed, and Occemyia lor aria occurs in 

 Oregon as well as the East. In the Conopinas, the species are 

 more local, and the Western and Southwestern species are 

 different from the Eastern ones; the Western species usually 

 with more yellow upon them. 



Conops arizonicus n. sp. 



Face whitish, cheeks wholly pale, front and vertex dark rich brown, 

 except that the white extends" up as a narrow silvery stripe on inner 

 orbits, and the dark extends down a little on the facial ridges. Antennae 

 dark brown, the third joint fully one and one-half times as long as the 

 second; thorax and abdomen black, shining; last segment of abdomen 

 more grayish pollinose and transversely wrinkled; hypopygium mostly 

 shining black; legs blackish, extreme tips of the femora and basal half 

 or third of tibiae pale. Vertex, thorax, abdomen and legs with short 

 blackish hair; wings with large costal dark cloud to end of second 

 vein, extending directly downward to tip of the fifth vein; extreme tip 

 dark. These marks are like those of C sylvosus, except that here the 

 cloud extends unbroken to the fifth vein and the abdomen does not 

 show pale bands; halters pale. The ventral plate is not as large as ni 

 C. sylvosus. 



Length, 7 mm. 



191 



