HENRY J. FRANKLIN. 81 



Eyes like those of the females ; ocelli placed near the supra-orbital 

 line, the lateral ones at most not much nearer to the eye 

 margins than to each other 26. 



14. Second dorsal abdominal segment clothed entirely with yellow 



pile 15 . 



Second dorsal segment mostly or entirely black 23. 



15. Third dorsal abdominal segment partly or entirely clothed with 



black or ferruginous pile 17. 



Third dorsal segment clothed entirely with yellow pile 16. 



16. Apical dorsal abdominal segments with white pile robiistus. 



Apical dorsal abdominal segments with reddish or ferruginous pile. 



haueri. 

 Apical dorsal abdominal segments entirely black iiiorrisoiii. 



17. Thorax clothed entirely with black pile eciiadoriu.s. 



Thorax not so clothed 18. 



18. Apical dorsal abdominal segments bearing more or less white pile. 



tucuiiiaiius or weisi var. albocaiidata. 



Apical dorsal abdominal segments with only black or ferruginous 



(of greatly varying shade) pile 19. 



19. At most not more than the last two of the apical dorsal segments 



of the abdomen bearing reddish-ferruginous (of varying 



shade) pile 20. 



More than two of the apical dorsal abdominal segments bearing 

 reddish-ferruginous pile 21. 



20. Malar space shorter than the pedicel of the antenna. ..frateriius. 

 Malar space fully as long as the pedicel of the antenna 48. 



21. Dorsum of abdomen with all the segments beyond the second 



clothed entirely with reddish-ferruginous pile haueri. 



Dorsum of abdomen with at least one of the segments beyond the 

 second clothed partly or entirely with dark pile 22. 



22. From California and (northwestern Mexico?) crotcliii. 



From South America robustiis var. riifocaiidatns. 



23. Ocelli placed somewhat below the narrowest part of the vertex, 



the eyes converging somewhat above them ...ranioiionsis. 



Ocelli exactly in or slightly above the narrowest part of the vertex, 



the eyes not converging above them 24. 



24. Dorsum of the thorax bearing a fairly well defined patch of white 



pile on the disc funebris. 



Dorsum of thorax without white pile 25. 



25. Dorsum of thorax clothed with yellow pile in front and on the 



scutellum, with a black band between the wings. 



robustus var. hortiilaii.s. 

 Dorsum of thorax entirely or almost entirely black, there being 

 often some yellow hair mixed with the black in front. 



bracliycephalus. 



TRANS. AM. ENT. SOC, XXXIX. (11) 



