92 COLEOPTERA. 



It will be gathered from the names first above quoted 

 that this insect more resembles a Cryptophagus than a 

 Silva?ius : it is, in fact, not unlike a small example of C. 

 (listing uendus, with the thorax more quadrate and not 

 toothed in the middle, more finely punctured, and of flatter 

 and less robust build. 



18. Elmis (LniNius) troglodytes, Gyllenhal ; Thomson, 

 Scand. Col., ii., p. 132; Ent. Ann. 1867, p. 77. 

 As the characters assigned to this species by its introducer 

 to our lists (Mr. G. R. Crotch) are at variance with those 

 mentioned for it by Erichson and Thomson, and it has not 

 been generally recognized here (I was only hitherto aware 

 of two examples, in Dr. Sharp's collection and my own), 

 I may observe that Mr. "WoUaston on his last excursion 

 to Slapton Ley, S. Devon, found many specimens of it, 

 on the edges of the Ley, along wdih Hydroporus minu- 

 tissimus, and could evidently have captured almost any 

 number, if the specific difierences of the little creature had 

 been recognized at the time. From some of these, kindly 

 sent to me by that gentleman (and named by Dr. Sharp), I 

 am enabled to give the following characters for E. troglo- 

 dytes, as compared with the common tuberculatus : — it is 

 on the average decidedly smaller (the largest is quite the 

 size of the smallest tuberculatus), and apparently slightly 

 lighter in colour, with more slightly built antennje and 

 tarsi ; its thorax is not so long, with the disc more closely 

 (though very minutely) punctured, so that it is not so 

 shining, and the sub-lateral lines straight, {i.e., parallel with 

 the margin, and not sub-flexuous); its elytra have the three 

 discal striae very obsoletely punctured, the 4th (not the 6th, 

 as Gyllenhal says), which continues the thoracic sub-lateral 

 line, formed of smaller and closer punctures, and the space 



