Hymenoptera Or lent alls. 283 



the third antennal joint ; eyes rounded inwardly, converging 

 beneath ; the pubescence on the head in front long and 

 dense ; the punctuation finely rugose. Scutellum above 

 flat, laterally obliquely margined ; the apex of metanotum 

 rounded, without laminae. Median segment above laterally 

 obliquely, in the centre below, transversely striolate, the stria- 

 tions wide apart and stout ; shining, impunctate, metapleurae 

 finely rugose, obliquely striated ; the spine at the base of the 

 median segment stout, acute. Abdomen shining, aciculate ; 

 densely pilose ; pygidial area acutely pointed, the pubescence 

 fulvous at the apex, dense; the base of the petiole depressed, 

 striolated. The recurrent nervure is received somewhat 

 beyond the basal third of the radial cellule. Length 6 mm. 

 Had. Nugata, Ceylon {George Lewis). 



Explanation of Plates. 



PLATE IX. 



FIG. 



1. Tachyles Rothneyi, Cam. 



2. Nologonia hiteipennis, Cam. 



3. Tachytes tarsatus, Smith. 



4. Ammophila violaceipennis, Cam. 



5. Notogonia erythropoda, Cam. 



6. Gastroserictis Wrott-ghtont ', Cam. 



7. Sphex xanthoptera, Cam. 



8. Piagetia fasciatipennis , Cam. 



9. Rhinopsis ruficornis. 



10. Sphex dialwlicus, Sm. c? organs. 



11. Ammophila tyrannica, Cam. 



12. Sphex aurttknia, <$ organs. 



13. Nysson rztgosus, head, 13 11 antenna. 



14. Gorytes orientalis, head, 14" antenna. 



15. Do. amatorius, head, I5 a antenna. 



16. Amptdex compressa, Fab. 



17. Piagelia rtificoi-nis, Cam. face. 



18. Nysson erythropoda, head, i8 a antenna. 



