CARABID^E. CYCHRUS. 66 



Dyschirius gibbus, Steph. Mand. 1. 43, et Manual, p. 12. 

 Clivina minima, Ahrens, Archiv. no. 13. 



Dyschirius minimus, Curtis, Ent. pi. 354. Steph. Mand. 5. 

 370, et Manual, p. 12. 



Bronze or bluish brass. Head with a deep oblong fovea on 

 each side enclosing a strongly elevated ridge between them ; 

 mouth, base of the palpi and of the antennae red. Thorax very 

 convex, sides rather globose, finely channeled down the centre 

 and transversely wrinkled. Elytra ovate, not much wider in 

 front than the thorax, shoulders rounded, sides dilated at the 

 middle, apex again narrower and rounded, very convex, strongly 

 punctate-striated, the punctured striae vanishing before the apex, 

 and the marginal one abbreviated at the shoulders ; legs pitchy 

 red, sometimes paler, femora occasionally darker, anterior tibia? 

 armed with two minute teeth externally, the apical one most 

 distinct. Length 1 line. 



This insect is commonly distributed and usually occurs in 

 great abundance. The small variety described by Mr. Curtis 

 under the name minimus presents no constant characters, beyond 

 its uniform inferiority in size, to separate it satisfactorily, and is 

 now, I believe, generally admitted to be a small local variety. 

 It is found in vast profusion on the alluvial deposits in the 

 vicinity of Whittlesea Mere, in May and June. Also in many 

 other parts of the kingdom both inland and on the coast. 



Subfam. 3. CARABIDES, Westwood. 



Genus 11. CYCHRUS, Fabricius. 



Mentum dente media nullo. Ligula minuta subacuminata ; para- 

 glossis vix ullis. Palpi articulo ultimo fortiter securiformi. 

 Mandibulse elongate angustatce intus dentate. Labrum bi- 

 fidum. Tarsi in utroque sexu simplices. 



1. C. rostratus : ater ; thorace angustato, postice transverslm im- 

 pressu, angulis posticis subrotundatis elevatis ; elytris ovatis 

 punctato-granulatis margine carinatis. 



Tenebrio rostratus, Linn. F. S. 923; S.N. 2. 677. 



Cychrus rostratus, Fab. S. El. 1. 165. Gyll. Ins. Suec. 2.71 . 

 Dej. Spec. 2. 8 ; Icon. 1. 260. pi. 28. Steph. Mand. 1. 45, 

 et Manual, p. 13. Curtis, Ent. pl.426. Erichson, Kafer, 11. 



Deep black. Head very narrow and elongate, slightly rugose- 

 punctate, with an elevated line on each side at the base of the 

 antennae, the apex of the latter ferruginous. Thorax narrow, 

 truncate in front, sides rounded and widest in the middle, con- 



D 



