StenUS.'] STAPHYLINlDiE. 333 



in the preceding species, witli dorsal channel plainer ; elytra with less 

 evident depressions ; hind body rather finely and tliickly punctured, 

 witli a longitudinal keel at base of front segments ; legs black, hind 

 tibiae in male furnished with a very distinct tooth-like elevation on 

 their inner side about a third from apex, a character which will at once 

 distinguish the species. L. 4|-5 mm. 



Seventh ventral segment of hind body in male smooth in middle, 

 deeply emarginate at apex, with two tubercles at base ; sixth segment 

 emarginate in middle of apical border,, broadly lioUowed out in a smooth 

 depression, enclosed between two elevated ridges (clothed with long 

 yellow hairs) which terminate behind in a tooth ; the other segments 

 exhibit somewhat the same structure but are not toothed, and not, or 

 scarcely perceptibly, sinuate. 



In moss, haystack refuse, &c., in dry places; local; London district, generally 

 distributed, and not uncommon ; Hastiusjs; Deal; Brighton; Barmouth; Manchester 

 district; it is chiefly confined to chaliiy districts in the south and south-east of 

 England. 



S. longritarsis, Thorns. Smaller than the preceding with the head 

 narrower and more deeply excavated ; palpi with the first joint, and only 

 the extreme base of second, light ; thorax shorter ; elytra longer, broader 

 in proportion, more convex, and more uneven ; in the male the hinder 

 tibife have no elevation on their inner side, and the seventh segment is 

 sparingly punctured before the emargination, and has two very obsolete 

 tubercles, which are sometimes absent ; the characters of the remaining 

 segments somewhat resemble those of S. ater, but are much less pro- 

 nounced. L. 4-4i mm. 



Marshy places, at roots of grass, &c.; first taken by Mr. Rye at Wimbledon, and 

 \i has also occurred at Esher : these are apparently the only localities known for the 

 insect. 



S. G-uynemeri, Duv. (rugosus, Kies.). Deep shining black, sculpture 

 of front parts extremely rugose and uneven and in parts warty; head 

 with a shining central keel and two more or less interrupted keels 

 between this and eyes ; antennae pitchy with darker club, maxillary 

 palpi pitchy black, with first joint and base of second more or less 

 broadly testaceous; thorax widest before middle and rather strongly con- 

 tracted behind, with a broad dorsal channel and several more or less 

 marked depressions ; elytra as long as thorax ; hind body with broad 

 margins, rather coarsely punctured at base and sides of the segments, 

 smoother on disc ; legs testaceous with the apex of femora broadly, and 

 the apex and base of tibiae narrowly, dark, tarsi pitchy, coxae black. L, 

 5 mm, 



_ Male with the sixth and seventh segments of hind body feebly emar- 

 ginate. 



Under stones and in moss in or by the side of swiftly running streams, especially in 

 waterfalls (often in company with Dianoiix and Quediug auricomus) ; local, and 

 chiefly found in hilly ami mountainous ttistricU. Hastings district ; North Devon, 



