1874.] , 227 



" Most destructive to Phalcenopsis and other Orchids," according 

 to Mr. Jamie, of Singapore, by whom the specimens were sent. 



This insect, judging from its resemblance to certain new species 

 which I have seen in Mr. Pascoe's collection, about to be described iu 

 the Journal of the Linnean Society for 1874, will probably enter into a 

 new genus Acythopeus ; but I cannot speak with certainty as to this, 

 having only seen a proof of Mr. Pascoe's paper for a moment. 



British Museum : Jamiary 13^A, 1874. 



NOTES ON SOME ODONATA, &c., IN THE COLLECTION OF THE 

 ROYAL DUBLIN SOCIETY. 



BY E. m'lACHLAN, T.L.S. 



The fact that the Eoyal Dublin Society is supposed to possess 

 Leske's collection of insects, and the types of the new species diag- 

 nosed therefrom by Zschach in the 'Museum Leskeanum ' (1788), 

 induced me to apply to Mr. W. P. Kirb}^, the curator, respecting these 

 types. He kindly forwarded to me a number of Nexiroptera (princi- 

 pally Odonata), as being possibly from Leske's collection. But a 

 glance at them convinced me that, with few exceptions, they never 

 had any ccunection with that collection, and that (although they have 

 no locality labels) they are really part of the collections formed by 

 Abbot, in Georgia, U.S.A. The whole collection is bleached by age 

 and exposure, but contains some species of extreme rarity, species 

 that have scarcely been found since Abbot's time, notwithstanding 

 the exertions of American collectors. 



I made the following notes concerning the best insects : — 



Calopteetgina. An example of Sylphis angustipennis, Selys, ? , 

 wanting all but the 5 first segments of the' abdomen. Exists in 

 only one or two other collections (Brit. Mus. and Collect. Hageu) . 



GoMPiiiNA. Tachopteryx Thoreyi, Hag., ^ ; also of great rarity, 

 though it appears to be widely spread in N. America. 



tEschxina. Anax longipes, Hag., J ; wanting segments 7 — 10 of the 

 abdomen. I believe the only other example known is the ? in 

 the Zurich Museum, also from Abbot. The one I have seen is 

 much bleached, but from the extraordinary length of the hind- 

 legs, the red femora, the form of the front, and the absence of 

 mai-kings thereon, there can be no doubt of the correct deter- 

 mination. The dimensions are : — lencfth of bodv 00 millimetres 



