So COLEOPTERA. 



Mr. E. W. Janson and confirmed by Dr. Kraatz, is in the 

 collection of the former gentleman. 



20. Stenus debilts, Dietrichsen (in litt. ?)?; E. C. Rye, 

 Entom. M. Mag. vol. i. 42 (descr.). 

 ojmcus, Wat. Cat. 



Mr. E. W. Janson has informed me that a specimen of 

 the insect taken by Messrs. Crotch and Matthews, and re- 

 ferred by them to S. opacus, has been returned to him by 

 Dr. Kraatz with the following remarks — " iSterio debili, 

 Diet/', {in litt.?) proximus; verisimiliter eadem species;^' 

 also that Dr. Kraatz seemed doubtful whether a description 

 had been published. 



This insect resembles S. huphthalmus, but may be dis- 

 tinguished from that species by its flat, dull appearance, and 

 very closely punctured abdomen. 



The original British specimens, in Mr. Waterhouse's 

 cabinet, are supposed to be fiom Northumberland ; the 

 species has also been taken at Horning Fen, Norfolk, by 

 Messrs. Ci'otch, Matthews, Brewer and Sharp, the former 

 of whom has also found it at Wicken Fen. It has been 

 taken at Repton by Dr. Hewgill, Mr. W. Garneys and my- 

 self; and at Halliford, by Mr. de Rivaz. 



All the specimens I have seen accord very closely with 

 Erichson's description o^ S. opacus; and it is only on the 

 express authority of Dr. Kraatz's communication that I have 

 brought forward the species as probably <S. debilis. 



I cannot understand how such close observers as Kraatz 

 and Thomson can pronounce S. opacus, Er., to be merely a 

 synonym of S, carbonarius, Gvll. It is Irue that the de- 

 scriptions of S. carbonaritis given by both the first-mentioned 

 authors accord with Erichson's opacus (and, by the way. 



