Bibliographical Notices. 441 



supposed to include only two French species, really contains twenty 

 perfectly distinct forms, of which about twelve inhabit the department 

 of the Aube. 



He divides the genus into two groups — of one of which A. cygnea 

 is the type, of the other A. anatina. He states that in every piece of 

 water in which species of this genus exist, members of both these 

 groups will be found ; that is to say, " That the discovery of one 

 species in any piece of fresh water is the certain sign of the coexistence 

 of a second." 



The present notice is devoted to the consideration of the species 

 alhed to A. cygnea ; of these the department of the Aube possesses 

 four, namely — 



1. A. cygnea (Mytilus cygneus, Linn.). 



2. A. venti-icosa, Pfeiff. 



3. A. Cellensis {Mytilus Zellensis, Schrot.). 



4. A. oblonga. Millet. 



The species are described at considerable length, with Latin cha- 

 racters, which however we do not insert here, as the author promises 

 to furnish a table of all the species at the close of his work. 



The synonymy is given in detail and accompanied by copious 

 remarks. 



IIL Catalogue of the Carabidte collected by M. Bocande in Por- 

 tuguese Guinea, with descriptions of the new species, by M. de La- 

 ferte-Senectere (pp. 65-75). 



This is the concluding paper of a series which has been published 

 in the ' Revue et Magasin de Zoologie ' during the last two years. 

 It contains descriptions of nine new species, with remarks upon four 

 others which have already been described ; the new species are as 

 follows : — Epomis Bocandei, E. Latreillei, Tomochilus Westermanni, 

 jEacus stygins,Hopilolenus insignis, Prionognathus fossor, Oodes tene- 

 hrio'ides, sulcatus and ellipticns. The descriptions are too long for 

 extraction, and the author gives no short characters. 



IV. Notice on a new species of Ant, discovered by M. Augusta 

 Salle in St. Domingo, making its nest on bushes in the marshy plains, 

 by M. Guerin-Meneville (pp. 75-79). 

 " This ant was found by M. Salle inhabiting a marsh called the 

 Cienega del Timhladero, from its trembling soil, and forming a por- 

 tion of an immense valley bordering the river Nisao, in St. Domingo. 

 This valley is inhabited by wild cattle, and has hitherto remained 

 almost unknown ; it was formerly a refuge for negroes escaping from 

 slavery. This Cienega del Timbladero is a large plain, covered with 

 tall reeds and with bushes here and there. During the rainy season 

 it forms an immense lake. In crossing it M. Salle's attention was 

 attracted by some nests which he observed attached to the summits 

 of the branches of some of the bushes, and which, as his negro guide 

 informed him, were constructed by ants. Examination confirmed 

 this statement ; on touching one of them it was immediately covered 



