113 
New Genus of Exotic Bees. 
(lilatati et truncati, uno ad angulum externum dentem parvum 
emittenti (7 k). A lx anticae angustse, ad apicem subacutae, 
cellula marginali angustissima, ad apicem appendiculata ; 
cellulis tribus submarginalibus lmaet 2da parvis, nervo valde 
obliquo divisis ; 3tia majori, subquadrata ; 4ta rudimentali. 
Abdomen magnum, subplanum, marginibus dense pilosis, $ seg- 
ments 7. 
Obs. — The situation of the genus Xylocopa has been the sub- 
ject of much uncertainty, having been placed by Messrs. Kirby 
and Latreille* in different situations at various times amongst the 
genera of bees, and indeed by the last-named author its true affi- 
nities are held in doubt. 
The insect above described clears up this difficulty in the most 
satisfactory manner ; it has all the habitus of a Xylocopa , and the 
structure of its mouth very nearly agrees with that genus, but the 
extraordinary formation of the intermediate legs immediately re- 
minds us of those of the males of Anthophora , and on comparing 
the general structure of these three genera, it will be evident that 
Mesotrichia forms a most admirable connecting link between the 
other two groups. The female is as yet unknown. 
Species 1. Mesotrichia torrida, Westw. 
Nigra ; capite, thorace antice, tibiis tarsisque 4-anticis albido- aut 
fulvo-pilosis ; metatarsis posticis intus rufo-hirtis ; alis fuscis, 
violaceo-micantibus ; abdomine glabro ; antennis nigris,subtus 
rufis, articulo primo subtus flavo ; penicillis contortis pedum 
intermediorum nigris. $ . 
Long. corp. lin. 13J. 
Expans, alarum, lin. 26. 
Habitat in Africa tropicali occidentali. 
In M us. Soc. Ent. Londinensis (olim Kirbii), et Soc. Hist. Nat. 
Belfast. 
* In the first edition of the Regne Animal, and in the valuable memoir upon 
the distribution of the bees, published in the Hist. Nat. des Fourmis, the Xylocopa: 
and Anthophore, are not far apart, but in all his other works Latreille placed 
Xylocopa near the commencement, and Anthophora near the extremity of the bees. 
By Kirby in the Monographia Apum Anglise, and by Saint Fargeau in the 
Encyclop6die Methodique, the two genera are considered as more nearly allied 
together, but not placed in immediate conjunction together. 
