56 



Bibliographical Notices. 



necessarily fragmentary and unsettled state of many most important 

 branches of the subject. 



One thing is quite certain — no one will rise from reading either of 

 these works with the idea of knowing more than he actually does ; 

 on the contrary, close attention is necessary to follow the close 

 reasoning of the author. But if, as few will doubt, the chief value 

 of scientific study, to any but professed inquirers, is the discipline it 

 exercises upon the mind, such a characterization is praise ; while, it 

 may be added, the professed student who is repulsed by too severe 

 a logic in his teacher, must not expect to go far. 



Revue des Odonates ou Libellules d^ Europe. Par Edm. de Selys- 

 LoNGCHAMPS, Membre de plusieurs Societes savantes. Avec la 

 collaboration de M. le Docteur Hagen. Bruxelles et Leipzig, 

 chez C. Murquardt : a Paris, chez Roret. 8vo. Mars 1850. 



In our 7th vol. p. 141, we gave a review of the * Monographic des 

 Libellulides d' Europe ' by the same author in 1840, and this may be 

 considered as a second edition of that work, with additions and im- 

 provements, such as might be expected from the known zeal and in- 

 defatigable industry he has manifested in this greatly neglected but 

 very beautiful family — the difficulties attending on these being much 

 greater than many of the other groups, from the strong power of wing 

 eluding often the grasp of our most active collectors, as well as the 

 fragile nature of their legs and the evanescent quality of the colours 

 when taken (unless carefully prepared) . 



The work consists of 408 pages and 1 1 lithographic plates illustra- 

 tive of the genera and species : viz. (* before are British.) 



Libellula trinacria, De Selys. 

 *4-maculata, L. 

 *depressa, L. 

 *fulva. Mull, (conspurcata, 



Chp.) 

 *cancellata, L. 



albistyla, De Selys. 



nitidinervis, De Selys. 



sardosa, Ramb. 



cycnos, De Selys. 



brunnea, Fonsc. 



Ramburii, De Selys. 

 *c8erulescens. Fab. 



erythraia, Brulle. 



rubrinervis, De Selys. 



pedemontana, Allioni. 



depressiuscula, De Selys. 

 *sanguinea. Mull. (Rceselii, 



Curt.) 

 *flaveola, L. 



?*Fonscolombii, De Selys. 

 *meridionalis, De Selys. 

 *striolata, Chp. 



* Libellula vulgata, L. (near Hull.) 

 *Scotica, Donov. 

 *dubia, Vand.Lind.{Yorks.), 

 Brit. Ent.ip\.7 12 SiS next. 

 [The Epping specimen is 

 either a large one of du- 

 bia or small one of next. 

 De Selys could not 

 quite determine, but he 

 thought the latter.] 

 ?*rubicunda, L. (Epping.) 

 peetoralis, Chp. 

 albifrons, Burm. 

 caudalis, Chp. 

 nigra, Vand. hind. 

 Epitheca bimaculata, Chp. 

 Cordulia metallica, Vand. Lind. 

 alpestris, De Selys. 

 *arctica, Zetterst. (Scotland 



and Ireland.) 

 flavomaculata, Vand. Lind. 

 *aenea, L. 

 *Cmtisu, Dale,B.E. pi. 616, 



