Mr. T. V. Wollaston on Additions to Madeiran Coleoptera. 221 



to the section with overlapping thorax ; and I should place it 

 near coracinus and niyrita, but towards scitulus and alpinus" 



Fara. Trichopterygida3. 



Genus ELACHYS. 



Matthews, in litteris. 



Elachys abbreviatellus, Heer. 



E. minutissima, oblonga, pubescens, nigra, subnitida ; prothorace ely- 

 trorum latitudine, ad latera rotundato, angulis posticis obtusis ; 

 elytris postice latiusculis truncatis abdomine paulo brevioribus ; 

 antennis pallide fusco-piceis, basi pedibusque dilute testaceis. 



Long. corp. lin. ^. 



Habitat Maderam australem, sub foliis marcidis et quisquiliis, hiuc 

 inde vulgaris : in horto Bewickiano ad " Palmeira," prope urbem 

 Funchalensem, abundat; necnon etiam ad S. Antonio da Serra 

 parce cepit Dom. Bewicke. 



Trichopteryx abbreviatellus, Heer, Fauna Col. Helv. i. 375 (1841). 



curta, Gillm. in Sturm, Deutsch. Fauna, xvii. (1845). 



abbreviatellus, Erich., Nat. der Ins. Deutsch. iii. 23 (1848). 



Titan abbreviatellus, Matthews, in Zool. xvi. 6110 (1858). 



E. excessively minute, narrowish, oblong, and black ; closely 

 roughened (but scarcely, perhaps, punctured), densely clothed 

 with a decumbent silvery pile, and slightly shining. Head 

 rather large and wide. Prothorax a good deal (and about 

 equally) rounded at the sides, being, therefore, narrower before 

 and behind ; at the latter of which it is distinctly margined, and 

 of the same breadth as the base of the elytra. Elytra rather 

 widened posteriorly and suddenly truncated, where they are a 

 little shorter than the abdomen ; and with their hinder margin 

 a little pale. Antennae pale brownish-piceous ; their base, and 

 the legs, diluted-testaceous. 



The present insect is perhaps scarcely separable from the 

 genus Acratrichis (i. e. Trichopteryx] ; nevertheless, since it was 

 removed therefrom by the Rev. A. Matthews, in his ' Synonymic 

 List of the British Trichopterygida' (vide 'Zoologist/ 6104, A.D. 

 1858), I have retained it as distinct. In his excellent Paper 

 on these minute creatures, it was assigned by Mr. Matthews to 

 the genus Titan of Newman; but, having been informed by 

 him subsequently " that the term Titan must be altered," and 

 that he intends " to propose Elachys in its place," I have quoted 

 it accordingly. It seems to differ principally from the members 

 of Trichopteryx proper by its hinder coxse not being lamellated : 

 nevertheless it has many external features of its own, in outline 

 and general aspect, which would induce the suspicion that a 

 close examination of its oral organs would disclose other cha- 



