1932 Insects. 



Postscript to Dr. Schaum's Revision of British Hydrocantharidce. — Since my paper 

 on the British Hydrocantharidae went to press, my attention has been called to the 

 description of a species by Mr. Babington, in the ' Annals and Magazine of Natural 

 History;' and this affords me the opportunity of severely reprobating the practice of 

 publishing, in the innumerable numbers of the very numerous periodical journals, 

 isolated descriptions, which are thus certain to escape the notice of the monographer 

 and systematic entomologist. Who would load his memory with such notices ? The 

 reader is requested to make the following additions to my paper (Zool. 1887). 

 Page 1888, line 23, for ericetorum read subalpinus. 



„ line 24, for ceerulescens read cyanipennis. 



„ line 25, for Wal. read Watlt. 



„ Hue 33, add the name of Mr. Waterhouse, of the British Museum. 



Genus Agabus, Leach, Erichs. 

 Page 1894, after the sixth species, A. affinis, Payk., make the following addition. 

 6*. A. striolatus, Gyll., Aube. 



Col. rectus, Babington, Ann. and Mag. Nat. Hist. vi. 53. 

 I have compared specimens of the Colymbetes rectus of Babington, in the cabinets 

 of Messrs. Stephens and Wollaston, and find it to agree perfectly with the elaborate 

 descriptions of A. striolatus of Gyllenhall and Dr. Aube. — H. Schaum ; London, Sep- 

 tember, 1847. 



Notes on the British Species of Pselaphida. By H. Schaum, M.D., Sec. Ent. Soc. 



of Stettin, &c. 



Since the publication of Denny's treatise on the Pselaphidae, in 1825, this group 

 of small Coleoptera has been the object of careful researches of several distinguished 

 entomologists. Dr. Aube has published, at two different periods (1834 and 1844), 

 monographs of it, the former in Guerin's ' Magazin de Zoologie,' the latter in the 

 ' Annales de la Societe Entomologique de France.' Erichson has described most 

 precisely the genera and species occurring in the Mark Brandenburgh ; and lately 

 Baron Chaudoir has given an enumeration of the species found near Kiew, in Russia, 

 in the ' Bulletin de la Societe Imperiale des Naturalistes de Moscou.' It may, there- 

 fore, not appear inopportune to submit the British species of this group to a short re- 

 vision, in order to render the nomenclature of these authors concordant. 



Of the six genera, Euplectus, Bythinus, Areopagus, Tychus, Bryaxis and Psela- 

 phus, established in this group by Dr. Leach, five are universally adopted, the sixth, 

 Areopagus, offering no characters of any importance, having been united with Bythinus 

 by all the continental authors. 



In Denny's monograph of the genus Euplectus eight species are described, viz., 

 E. Reichenbachii, Denny, sanguineus, Denny, Karstenii, Reich., signatus, Reich., 

 Kirbii, Denny, pusillus, Denny, bicolor, Denny, brevicornis, Denny. Of these, E. bre- 

 vicornis has been made by Dr. Aube the type of a separate genus, Trimium ; E. 

 Reichenbachii is the Pselaphus nanus previously described by Reichenbach, and 

 E. pusillus is identical with P. ambiguus of the same author. E. Kirbii, regarded by 

 Erichson and Aube as not sufficiently distinct from E. signatus, had also been sunk ; 

 but on carefully examining the typical specimen of that species contained in the 



