50 Mr. G. R. Waterhouse's Descriptions of 



5. Eiiplectiis signatus, Denny, Monogr. p. 13, sp. 4, pi. 1, fig. 4. 



, Aube, Monogr. p. 56, tab. 92, f. 3. 



Kirbii, Aube, 1. c, p. 54, tab. 91, f. 4. 



Pselaphus signatus, Keichenb, Monogr. p. 73, fig. 22. 

 Euplectus minulus, Stephens's Collection. 



This species agrees most closely in its characters with E. nanus, 

 but is usually rather smaller, and narrower, and always (I believe) 

 of a testaceous colour. The four fbveae on the head are less dis- 

 tinct, being more completely confounded with the grooves which 

 unite them, and the small foveola on the vertex is here wanting. 

 The spur at the apex of the middle tibia of the male is less dis- 

 tinct, and indeed very minute. 



Not uncommon in the neighbourhood of London. 



6. Euplectus Karstenii, Denny, Monogr. p. 12, sp. 3, pi. 1, f. 3. 



, Aube, Monogr. p. 56, sp. 6, pi. 92, f. 2. 



Pselaphus , Reichenb. Monogr. p. 71, t. 2, f. 21. 



Euplectus sanguineus, (part) of Stepliens's Collection. 

 Karstenii, of Stephens's Collection. 



Agreeing with E. signatus in colour, and very nearly in size, 

 I find this species most frequently confounded with that insect. 

 The average size, however, is a trifle less than in E. signatus, and 

 its form a little narrower ; the head is relatively broader, being 

 rather broader than the thorax, whilst in E. signatus the head is 

 scarcely as broad as the following segment ; the depressions are 

 less strongly marked, the raised area between them is broader 

 and extends more forwards, and the surface is more thickly punc- 

 tured. The thorax is rather narrower, more distinctly punctured, 

 and has the central posterior fovea smaller. I have found no 

 distinct spur to the middle tibiae in any of the specimens which I 

 have examined, and they are pretty numerous. 



Rather more plentiful in the neighbourhood of London than 

 the preceding species, according to my experience ; is found about 

 cucumber-frames, and occasionally in the cellars of London. I 

 possess a good series of specimens which were procured from a 

 double-handful of fresh-mown grass, which was placed in one of 

 my cellars as a trap for small Coleoptera. A single specimen found 

 by me in the region of the nest of Formica fuliginosa is much larger 

 than any others, being fully equal in size to the E. nanus. 



Sect. 2. TJwrax with the three fovece near the posterior margin 

 united by a transverse groove ; the discoidal fovea wanting. 



7. Euplectus ambiguus, Aube, Monogr. p. 58, sp. 10, pi. 93, fig. 2. 



