BEETLES. 23 



apterous. Elytra elongated, and only slightly convex. They 

 may be found running on paths, or under stones. 



* 0. vulgaris, Linn. (Plate III., Fig. 16). The thorax is 

 obtuse, narrower behind than in front, with a corrugated 

 groove and two deep longitudinal depressions. It is a common 

 species. 



* 0. nigrita, Fabr. Much smaller than the last, and with 

 the elytra grooved with three deep punctures. 



Genus Sphodrus, Clairv. 

 Body elongated, oval. Antennae half the length of the 

 body, finely pubescent from the fourth joint onwards. They 

 frequent damp places in woods, under stones, &c., but are 

 also sometimes met with in cellars and outhouses. 



* S. leucophthalmus, Linn. (Plate III., Fig. 17). Elytra 

 finely punctate-striate. It must be looked for in damp places, 

 under stones, and beneath fallen leaves, or in cellars. 



Genus Steropus, Ziegl. 

 This genus resembles the last, but the pronotum is more 

 rounded behind. It is found on paths and under stones. 



* S. madidus, Fabr. (Plate III., Fig. 18). Elytra with three 

 deep punctures. It is fairly common beneath stones, &c. 



* S. cethiops, Illig., is like the last species, but has a deep 

 concavity in the hinder angles of the pronotum. It is found 

 in mountainous districts. 



Genus Pterostichus, Bon. 

 Black, apterous beetles of moderate size, with the thorax 

 narrower behind than in front. They are also found beneath 

 stones, especially in hilly districts. 



* P. nige7', Fabr. (Plate III., Fig. 19). Wing-cases without 

 punctures in the interspaces. Common under stones. 



