INSECTA MADERENSIA. 33 



links do not exist, it may be convenient to regard it as at any rate a section of 

 Anchomenus proper. In the only two Madeiran specimens which I have hitherto 

 been able to detect, it so happens that we have a typical representative of each of 

 these divisions ; and hence the above remarks seem almost necessary, in order to 

 account for the juxtaposition of insects apparently so dissimilar under a common 

 genus. The Anchomenl occm- beneath stones in damp localities, and are especially 

 partial to the margins of streams and swampy imdi-aiiied spots. 



§ I. Protliorax angustatus subcordatus, angulis posticis subrecfis : palpi labiales a.vticuh ultimo sub- 



acuminato. 



23. Anchomenus palUpes. 



A. nigro-piceus, prothorace postice punctato, elytris striatis, antennis pedibusque pallidis. 



Var. /3. piceus, elytrorum margine, antennis pedibusque pallidis. 



Long. Corp. lin. 3^. 



Carabus obhngus, Fab. i:nt. Si/sf. i. 140. 72 (sed vid. 71) (1792). 



pallipes. Fab. Syst. Eleu. i. 187 (1801). 



albipes, Illig. Mag.fdr Iiisekt. i. .54 (1801). 



Ancliomenus albipes, Sturm, Deutsch. Fna, v. 175 (1824). 



palUpes, Dej. Spec, des Col. iii. 119 (1828). 



, Heer, Fna Col. Helv. 58 (1841). 



Habitat per litora fluviorum atque in locis humidis Maderse, sub lapidibus, toto anno vadgaris. 



A. pitcby-black, slightly shining. Head and prothorax much narrower than the elytra ; the latter a 

 little convex, subcordate, with an obscure dorsal channel, and coar.sely punctured behind. Elytra 

 striated, the strise being impunctate. Antenna, palpi and legs pale testaceous. 

 Var. /3. less deeply black, with the margins of the elytra, and occasionally also the suture, pale fer- 

 ruginous. 



Rather a common insect, beneath stones, at the edges of most of the small 

 moimtaiu streams of Madeira, though more particularly abundant between the 

 limits of from 2000 to 4000 feet above the sea. I have not myself observed it ia 

 the other islands of the group, but I possess an old and pale-colom-ed specimen 

 from the collection of the late Dr. Heiaecken, and labelled as a " Stomis," which 

 appears to have been taken in Porto Santo. It is universal throughout Eiu-ope, 

 and occurs likewise in Als^eria. 



"^O^ 



§ II. ProtJiorax latior, plus minusve transversiis, angulis posticis rotundatis : pa^pi labiales artieulo ultimo 

 {ut in maxillaribus) subfusiformi-truiicato. (Agonum, Bon.) 



24. Anchomenus marginatus. 

 A. aeneo-viridis depressus, prothorace postice utrinque impresso, elytris subpunctato-striatis, singulo 



punctis tribus impresso, margiue tibiisque testaceis. 

 Long. Corp. lin. 4i-4i. 



