570 J^xplanation of Plates. 



Fig. 21. Orectocera (Paraphania) diabolus, Feb. 1900. 



22. Exoprosopa umhrosa^ Feb. 1900. 



23. Orectocera {Paraphania) diabolus, Jan. 1900. 



24. Tabanus, very near biguttatiis, Dec. 1900. 

 2."). Tascia honiochroa, Dec. 1900. 



26. Pi,eduvins, sp., April 1900. 



27. Harpactor tristis, April 1900. 



Explanation of Plate XXI. 



Group of black, dark-winged Mashonaland Aculeates 

 chiefly fossores, and their mimics, etc. 



Second Part of Group, chiefly Fosscres. 



All the figures are al)out 4 of the natural size. 

 All the specimens were captured by Guy A. K. Marshall, at Salis- 

 bury, Mashonaland, 5000 feet. 



Fig. 1. Sphex bohemani 9, Dec. 1899. 



2. „ „ (J, Jan. 1900. 



3. „ cyaniventris ^, Nov. 1899. 



4. „ pelopeiformis ^J, Jan. 1900. 



5. „ „ 9, June „ 



6. „ xnntliocerns 9> Dec. 1899. An Asclepiad pollen- 

 mass is seen on distal end of the left anterior leg. 



7. Sphex nmbrosns ^ , May 1900. 



8. Sceliphron chalybeimi (^ , F'eb. 1900. 



9. Tachijtfs mtttdensis f^ , Jan. 1900. 



10. „ „ 9, Dec. 1899. 



11. Ammophila ludovicus 9, Feb. 1899 to Jan. 1900. Ascle- 



piad pollen-masses are thickly crowded on the tarsi of the 

 two anterior pairs of legs. 



12. Ammophila ludovicus ^, June 1900. 



13. „ beniniensis, 9 , Jan. 1900. 



14. Enmoies tinctor (^ , Dec. 1899. 



15. „ „ 9, „ 



16. „ dysrhera $, Feb. 1900. 



17. „ „ 9, Nov. 1899. 



18. Xyloropa hottentotta 9, Jan. 1900. 



19. „ carinata 9 , Feb. 1899 to Jon. 1900. 



