370 PERCY SLADEN TRUST EXPEDITION 



12. Sphex umbrosus Christ. 



Sphex umbrosa Christ, Naturg. d. Insect, p. 293, 1791 : Cam., Trans. Linn. Soc, Ser. 2, 

 Zool., xii. 1907, p. 75. 



Sphex rufinervis Pdrez, Ann. Soc. Entom. France lxiv. p. 209, 1895. 

 Localities. Seychelles : Praslin, Mahe" (1905 and 1908 — 9). Also known from 

 S. Europe, Africa, India and Australia. 



The male has the wings darkened on the basal half, but is only a slight variety of 

 this common species. 



13. Sphex (Harpactopus) cegyptius Lep. 



Sphex cegyptia Lep., Hist. Nat. Ins. Hym. iii. p. 356, 1845. 



Locality. Astove (R. P. Dupont). A common species in East Africa and Western 

 Asia. The Astove specimens are in the British Museum : the species was not obtained by 

 the Percy Sladen Trust Expeditions. 



Genus Cercebis Latr. 



14. Cerceris nenitra Sauss. 



Cerceris nenitra Sauss., Soc. entom. ii. p. 25, 1887. 



Cerceris nenitra Sauss., Grandidier : Hist. Madagascar xx. p. 551, 1892. 



Locality. Aldabra (Fryer). Also from Madagascar. 



Genus Notogonia Costa. 



15. Notogonia reticulata Sauss. 



Notogonia reticulata Sauss., Grandidier: Hist. Madagascar xx. p. 512, 1892. 



Notogonia mahensis Cam., Trans. Linn. Soc, Ser. 2, Zool., xii. 1907, p. 78. 



Localities. Seychelles: Silhouette, Mare aux Cochons, over 1000 ft., August and 

 September, 1908 : Mahe, near Morne Blanc, October 1908 ; above Port Glaud, 500— 

 1000 ft. November 1908 (H. Scott). Many specimens of both sexes. Also known from 

 Madagascar. 



16. Notogonia seychellensis Cam. 



Notogonia seychellensis Cam., Trans. Linn. Soc, Ser. 2, Zool., xii. 1907, p. 77, ? ($). 



Notogonia rufofemorata Cam., I.e. p. 78, 1907 ($). 



Cameron states that he is describing both sexes of N. seychellensis, but I have seen 

 the types of seychellensis ? and rufofemorata and consider that the differences are merely 

 sexual. He does not point out the differences between the sexes of seychellensis or com- 

 pare the males of his species. 



Localities. Seychelles: Silhouette; Mont Pot-a-eau, over 1000ft. (August): Mahe\ 

 Cascade Estate, &c Specimens always seen singly (H. Scott). 



Genus Tachysphex Kohl. 



17. Tachysphex micromegas Sauss. 



Tachysphex micromegas Sauss., Grandidier : Hist. Madagascar xx. p. 481, 1892. 



