30 CARABID^:. DYSCHIRIUS. 



obsolete impressions are discernible under a magnifying glass 

 scattered here and there irregularly ; the anterior tibiae terminate 

 in two strong spines, of which the outer one is stoutest, rather 

 longest and incurved, they are also furnished externally with two 

 very obsolete teeth. Length 2 lines. 



I captured three examples of this very distinct species, which 

 I have now described for the first time, by a stream on the Small- 

 mouth sands near Weymouth. 



7. D. thoracicus : census , nitidus, thorace rotundato, elytris ovatis 

 subtiliter punctato-striatis, stria marginali per basin con- 

 tinuata, tibiis anticis extus acute bidentatis. 



Scarites thoracicus, Fab. S. El. 1. 125. 



Clivina thoracica, Gyll. Ins. Suec. 2. 1/0. Dej. Spec. 1. 426 ; 



Icon. 1. 224. pi. 24. 

 Dyschirius thoracicus, Erichson, Kafer, 36. Heer, Faun. Helv. 



16. Putz. Mon. 13. 4. 



D. arenosus, (Leach) Steph. Mand. 1. 41, et Manual, p. 12. 

 Clivina niyra ?, Ahrens, Archiv, no. 10. 



Above brassy or bronzed, sometimes pitchy. Head small, 

 deeply foveated on each side between the eyes, with two elevated 

 transverse ridges in front ; mouth, mandibles (except the tip 

 which is black), basal joint of the antenna, and base of the two 

 next joints red. Thorax very globose with a strong dorsal furrow, 

 deepest at the base, and the usual transverse impression, bordered 

 on both sides by numerous fine longitudinal stria3 in the <$ . 

 Elytra exactly ovate, slightly narrowed in front, shoulders 

 rounded off, sides also rounded and a little narrowed at the apex, 

 distinctly but finely punctate-striated, more faintly so at the 

 extremity, the third interstice with three impressions, the upper 

 one sometimes wanting, the marginal stria carried over the 

 shoulder; anterior tibiae acutely dentate externally (PI. I. f. 15), 

 the apical tooth largest ; legs (except the anterior femora) ferru- 

 ginous. Length 1J line. 



The more ovate and less parallel form, of this insect distin- 

 guishes it from any of the foregoing except impunctipennis, from 

 which it differs in having the stria? distinctly punctured, and by 

 the acute denticulations of the anterior tibia?, as well as in other 

 particulars. D. arenosus of Stephens' s collection is an immature 

 example of this species. 



This insect is found in great profusion on the sands near the 

 Chesil Beach, Isle of Portland ; at Bridlington, Yorkshire ; and 

 also on many other parts of the coasts of England, Scotland and 

 Ireland. 



