146 Mr. F. Smith on some neiv Genera and tipecies 



narrowed, or straightened posteriorly, and with the fore-angles, though 

 obtuse, less decidedly rounded off) ; and the two minute teeth behind 

 the two larger ones, of its front-tibise, are in the A. oculata, nearly 

 obsolete. Its most decided difference, however, is in the shape of 

 the eye, — which is considerably larger and more circidar, and extends 

 much neaYer to the lateral edge (and hinder angle) of the clypeus, 

 than is the case with the A. granidata. 



Althoiigh a representative (viz. the A. sardoa, Gene.) has been 

 described from Sardinia, it is probable that the group is essentially 

 an African one, and that many allied forms will consequently, in the 

 course of time, be brought to light. In addition to the present 

 species, from the Cape of Good Hope, and the A. granidata from 

 Senegal, I possess a third (nearly related, I imagine, to the Sar- 

 dinian one) from the Canaries, captured by myself near Arrecife, 

 on the sandy shores of the island of Lanzarote. Of the A. ocidata 

 there was but a single example amongst the insects collected by 

 Mr. Bewicke ; but I have seen a second in the possession of Mr. 

 Waterhouse. 



XI. — Descri])tions of new Genera and Species of Exotic Hymenoptera. 

 By FREDERICK Smith, Esq., Assistant in the Zoological Department 

 of the British Museum. 



Of all the various genera of bees, there is not one which contains 

 more brilliant and beautifully coloured species than Atigochlora ; the 

 Mexican species, described in the present paper, are remarkable for 

 the extreme richness of their coloming ; this genus contains the 

 Halicti of the New World. They are separated, however, from the 

 genus Halictus by several structural characters, and also by the 

 different habit of the species ; aU, whose economy I have ascer- 

 tained, burrow in putrescent wood, or construct tunnels under the 

 bark of trees. Eight new species of Bomhus are described, those 

 from Mexico are amongst the most beautiful of that widely distri- 

 buted genus. 



Family AndremidgB. 



Div. ACUTILINGTJES. 



Genus Augochlora, Smith. 

 1 . Augochlora Jlammea , 



A. Isete polita, serata, punctata, et pubs pallida sparse tecta, alls hyalinis. 

 Female. Length 3 lines. Brilliant shining copper, with tints of 

 rich carmine, particularly on the disk of the thorax, and on the vertex 

 of the head ; closely and sti'ongly punctured on the head and thorax ; 



