Mr Snell, The Natural History of the Island of Rodrigues 289 



Expedition, secured one specimen of Myrmeleon obscurus, Rambur. 

 This species was described from Mauritius, and is widely distributed 

 in Africa. 



The Odonata consist of six species, as follows : 



Pantala flavescens. Fab., occurs in all the warmer parts of the 

 world, but not in Europe. 



Tramea limhata, Desj., a very variable species of wide dis- 

 tribution, described from Mauritius. 



Orthetrum hrachiale, P. de Beauv. Found elsewhere in Zanzibar, 

 Congo, etc. 



Anax imperator mauricianus, Rambur. Agrees with a specimen 

 in the Museum of Zoology, Cambridge, named by Campion. The 

 species was also taken by Gulliver, on the Transit of Venus Ex- 

 pedition. 



Ischnura senegalensis, Rambur. Widely distributed in tropical 

 Asia and Africa. 



Agrion ferrugineum, Rambur. One specimen was taken by 

 GulHver. The present collection contains several specimens. 



The collection of Hymenoptera, exclusive of Ants, contains two 

 species of Tubulifera, eleven species of Aculeata, and approxi- 

 mately 170 specimens (of about twenty species) of Parasitica. The 

 two species of TubuUfera, for the identification of which I am 

 indebted to Mr F. D. Morice of the British Museum of Natural 

 History, are Chrysis {Pentachrysis) lusca, Fab., found also in India, 

 Ceylon and Mauritius, and Philoctetes coriaceus, Dahlb., known 

 also from East and South Africa. Of the Aculeata, the Formicidae 

 are not yet determined, and a species of Halictus is at present 

 unidentified. The remainder of the Aculeates are as follows : 



Megachile disjuncta, Fab. Common in India; recorded also 

 from Mauritius. (M. lanata, Fab., is recorded by Smith as having 

 been taken by Gulhver on the Transit of Venus Expedition.) 



Megachile rufiventris, Guer. Found elsewhere in East and South 

 Africa, Mauritius and Seychelles; previously taken in Rodrigues 

 by GulUver. 



Apis unicolor, Latr. Previously taken in Rodrigues by Gulhver. 

 Found in the Seychelles, Amirantes, Chagos (Diego Garcia, Peros 

 Banhos). Commoner in Madagascar. 



Odynerus trilobns, Fab. This species has not been previously 

 recorded from Rodrigues. It is common and widely distributed, 

 being known from Madagascar, Mauritius, Reunion and South 

 Africa. 



Polistes macaensis, Fab. Previously taken by Gulhver and 

 listed as P. hebraeus, Linn, There seems to have been considerable 

 confusion over these names, as Cameron {Trans. Linn. Soc. (2), 

 vol. XII, p. 71) hsts this species as P. hebraeus, Fab., stating that 

 it is known from Rodrigues. Dr R, C. L. Perkins has, however, 



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