234 A. L. MKLANDER. 



The European precatoria Fallen and Walker's albipes are inclu 

 ded in the table as from North America on Walker's authority. 

 The position of albipes was determined from a hint of Dr. Williston, 

 that it is associated with jyrecatoria, and therefore belongs to the 

 group Mantipeza. 



Aaal and discal cells present (Mantipeza Rundani) 10. 



Discal cell united with one of tbe other cells 2. 



2. Anal cell wanting (Microclromia Bigot) 6. 



Anal cell present 3. 



3. Second basal emitting three veins (Neoplasta Coquillett) 4. 



Second basal with two veins, one forked. . -(Hemcrodromia Meigen) 5. 



4. Filaments of hypopygium hidden scapularis Loew. 



Filaments of hypopygium exposed. ■ ■ inexicana sp. nov. 



5. Thorax and abdomen red llefecta Loew. 



Thorax and abdomen black ... .colltisor sp. nov. 



6. Thorax partly red 7. 



Thorax wholly black ... 9. 



7. Femora with a spine-tipped tubercle at base beneath •. . .8. 



Femora with no such prominent tubercle empiformis Say. 



8. Thorax vittate superstitiosa Say. 



Thorax wholly red rogatoris Coquillett. 



9. Front femora longer than the coxae defessa Williston. 



Front femora shorter than the coxae ■ .captlis Coquillett. 



10. Wings wholly clear 11. 



Wings with at least a brownish stigma 12. 



11. Body uniformly fulvous to black albipes Walker. 



Thorax reddish in greater part 14. 



12. Stigma black ilOtata Loew. 



Stigma fuscous 13. 



13. Body cinereous valida Loew. 



Body light yellow, thorax brownish prsecatoria Fallen. 



14. Thorax darker at the margins, scutellum dark obMoleta Loew. 



Thorax lighter at the margins, scutellum light palloris Coquillett. 



Hetnerodroinia »«capularis Loew (Fig. 59). 

 Cent., ii, 54. 



Black, shining, humeri either testaceous or fuscous, rarely black, abdomen of 

 male often nearly all black, sometimes the basal segments whitish ; abdomen of 

 the female white, black at apex, the ovipositor yellowish, its base and apex 

 broadly black. Antennae, proboscis, halteres and legs white. Wings hyaline, 

 no stigma, second vein short. 3 mm. 



Maryland, Maine, Pennsylvania, Tennessee, Wyoming. 

 The sixth vein is sometimes wanting. 



This species was taken in company with Hemerodroviia collusor. 

 Three males, ten females. 



