DIPTERA. 36 ~ 



3. Front legs altogether yellow and without fringes («J ? ) diaphorina, O. S. 



Front legs not altogether yellow cyanea, Bell. 



4. Wings pure hyaline suavis > Loew ' 



Wings subhy aline or infuscated 5. 



5. Hind femora on the inner inferior side with two slender finger-like 



processes chichimeca, sp. n. 



Wings marked with black violacea, Loew. 



Wings subhyaline, with a yellowish tinge (<? $ ) Aem^roa, O. S. 



6. Thorax rufous, shining, sixth vein evanescent rubida, sp. n. 



Thorax wholly opaque black '• 



7. Wings with fuscous markings ; legs honey-yellow spiloptera, Wiedem. 



"Wings more uniform ; legs darker coloured 8. 



8. Tarsal joints darker at tip y - 



Tarsi uniform in colour • 1U * 



9. Femora reddish-yellow annulipes, sp. n. 



Femora black atrifemur, sp. n. 



10. Tibiae at most fuscous *■*■' 



Tibiae black 12 ' 



11. Anterior branch of third vein perpendicular to costa, straight . . . azteca, sp. n. 

 Anterior branch oblique, slightly sinuous dolorosa, sp. n. 



12. Wings fuliginous *■&. 



Wings hyaline -'•"■ 



13. Wings uniformly dark 14- 



Wings lighter at base (?) bicolor, Bell. 



14. Legs regularly ciliate . * 5 - 



Legs with bunches of hair montezuma, sp. n. 



15. Abdomen yellow basally pegasus, O. S. 



Abdomen black totipennis, Bell. 



16. Legs and thorax strongly pilose ( <J ) bicolor, Bell. 



Legs and thorax not pilose .vochitl, sp. n. 



4. Empis cyanea. 



Empis cyanea, Bellardi, Saggio etc. ii. p. 98 \ 



Hab. Mexico \ Amula in Guerrero 6000 feet (H. H. Smith). 



A single female specimen. The third antennal joint is considerably shorter than the 

 two preceding joints together ; it is pointed and terminates in a slender style, which is 

 as long as the joint itself. The front metatarsi are elongated and flattened, and, like 

 the distal end of the tibiae, provided with a fringe of scale-like hairs. The hind tarsi 

 are nearly black ; the metatarsi flattened, but not fringed. The mesonotum has no 

 trace of stripes. The hind femora and tibiae are fringed on both sides with scale-like 

 hairs. B. cyanea was placed by Osten Sacken (antea, p. 216) amongst the unidentified 

 Mexican species. 



