APPENDIX. 389 



made by liim on one of his voyages, in which objects of 

 natui-al history were al^ly introduced. He encouraged 

 natural history researches. 



Hymenoptera. 



Trigonalys compressus. Smith. Trans. Ent. Soc. Lond. 

 n. ser. I. p. . pi. 16. f. 2. 

 Sphex compressa. De Geer, Mem. III. 

 Trigonalys bipustulatus. Smith (olim) Ann, 6f Mug. 

 Nat. Hint. VII. (1851.) 



Hab. Nest of Polistes Lanio. Brazil. 



Among the Hymenoptera_, few genera have created 

 greater dispute than the anomalous genus Trigonalys of 

 Westwood. Mr. Macgillivray one day brought to the 

 British Museum the nest of a Brazilian Polistes. My 

 friend, Mr. Frederick Smith, is well known for his profound 

 knowledge of the Hymenoptera, Exotic and British, which, 

 though he has studied them only fourteen years, are better 

 known to him, perhaps, than to any other Hving Entomolo- 

 gist ; — the instant that he looked at the nest, he exclaimed, 

 " Why, here is Trigonalys ! " and certainly a large, black- 

 headed creature, not very like Polistes, protruded from one 

 of the cells. Mr. Smith, on the 7th April, 1851, communi- 

 cated this piece of information to the Entomological Society 

 of London, and in their Transactions his brief memoir was 

 lately printed. I cannot do better than give it in Mr. 

 Smith's own words. Mr. Smith, subsequently to the reading 

 of the paper, ascertained that the species had been described 

 in the great work of De Geer, a book of which it would be 

 well to have a condensed new edition. Mr. Smith says : 



" John Macgillivray, Esq., Naturalist to Her Majesty's Ship Rattlesnake, 

 lately presented to the British Museum the nest of a South American species 

 of Polistes, which he says is very abundant at St. Salvador, where even in the 

 streets it attaches its nest under the eaves of houses ; the species is the 



