1911] Promachus and Proctacanthus 157 



9. Scutellum with white bristles duryi 



Seutellum with black bristles 10 



10. Wings clear hyaline, all the femora entirely black nigrofemoratus 



Wings with the veins margined with brown, at least the posterior sides of 



all, the femora red 11 



11. Male genitalia elongate, the appendages curved inward at the tips and enclos- 



ing an open space beyond the other parts arno 



Male genitalia short, appendages but slightly longer than the other parts 



mlcans 



12. Thorax with brown markings, wings clear brown 13 



Thorax with dark, nearly black, markings, wings pale brown 14 



13. Wings long and wide, palpi with white hair, two or three bristles on the 



front side of the hind femora besides those near the apex longus 



Wings rather short and narrow, palpi with black hair, four or five bristles 

 on the front side of the hind tibia besides those near the apex 



philadelphicus 



14. Abdomen very dark, nearly black pollinose nigriventris 



Abdomen lighter, gray pollinose 15 



15. Large stout species, middorsal stripe of the thorax gray pollinose and not 



plainly differentiated milbertii 



Small, rather slender species of southern distribution, middorsal thoracic 



stripe usually plainly differentiated and not distinctly pollinose 



brevipennis 



Proctacanthus heros Wiedemann. 



Total length, 32 to 45 millimeters. Body red all over, mystax and 

 beard straw yellow, occipito-orbital bristles straw yellow; legs red with 

 black bristles and yellow hair; bristles of the scutellum black; wings 

 brown, 1 some of the cells along the inner margin nearly hyaline at the 

 middle. First four or five abdominal segments on each side with an 

 area of dense yellow pile, hairs on the dorsum of these segments and on 

 all parts of the posterior segments short and black. 



The large size of this species together with the red color of 

 the entire body and the pilose areas on the sides of the abdomen 

 easily characterize it. 



Specimens from Southern Pines, North Carolina, collected 

 by A. H. Manee. Also others from Georgia and Mississippi. 



Other writers have reported it from Florida, South Carolina 

 and Kentucky. 



Proctacanthus rufus Williston. 



Total length 30 to 36 millimeters. Body red, with the exception of 

 the first abdominal segment and the anterior margin of the second 

 which are black. Mystax and beard yellow, the latter lighter than the 

 former, palpi red with pale hair; thorax and legs mostly with dark hair 

 and bristles, scutellum with numerous black bristles, wings nearly 

 uniformly pale brownish, dorsum of the thorax plain red without distinct 

 markings of any kind. Abdomen black at base above, otherwise red, 

 the former color extends back to the anterior third of the second seg- 

 ment. Male genitalia enlarged, wider than the last abdominal seg- 

 ment, appendages from dorsal view wide at the base and narrowed 

 towards the apex. 



