582 CANARIAN COLEOPTERA. 



Habitat Lanzarotam ; in montibus supra Hariam exemplar unum 

 sub lapide collegi. 



In its extremely depressed surface, broadly obcordatehead, trapezi- 

 form prothorax, wide femora, very deeply sinuated anterior tibiae, and 

 slender posterior feet, this singular Staphylinid is a normal Achenium ; 

 nevertheless its totally apterous body, greatly abbreviated elytra, and 

 almost obsolete eyes (which are so diminutive and punctiform as to 

 be quite imperceptible from above) give it a character pecidiarly its 

 own. The excessive paleness of its entire coloiir (the head, pro- 

 thorax, and tibiae being rufo-testaceous, whilst the elytra, abdomen, 

 femora, and tarsi are more pallid still) will further distinguish it 

 from anything else with which we have here to do. The only spe- 

 cimen which I have seen was captured by myself, from beneath a 

 stone, on the hills above Haria, in the north of Lanzarote. 



889. Achenium salinum, n. sp. 



A. angustum, convexiusculum, alatum ; capite prothoi-aceque nitidis, 

 rufo-ferrugincis,regulariter sat profunde punctatis, illo triangulari- 

 ovali oculis parum maguis prominulis, hoc angusto (antice paulo 

 latiore) in linea media tevi ; elyti'is minus nitidis, pallido-testaceis, 

 ad basin infuscatis, levissime parce punctulatis ; abdomine sub- 

 opaco, rufo-brunneo ; antennis (gracilibus) pedibusque rufo-ferru- 

 gineis, tarsis posterioribus pallidioribus. — Long. corp. lin. 2^, 



Habitat Lanzarotam, ad marginem lacus ejus salini " Januvio " 

 dicti Martio exeunte a.d. 1859 specimen unicum deprehendi. 



Like the last one, this species also is unique and was captured in 

 Lanzarote. Nevertheless in its habits it is totally dissimilar ; for 

 whilst the A. suhccecum was found at a comparatively high elevation 

 on the mountains in the north of the island, the salinmn, on the 

 contrary, I cajitured at the edge of the curious salt lake of Januvio 

 (which adjoins the south-westeni coast) — running rapidly over the 

 mud in a most briny spot. 



In its extremely narrow and comparatively convex body, as well 

 as in its more oblong (or less obcordate) head and the fact of its pro- 

 thorax being but very slightly widened in front, the A. salinum has 

 much the prima facie aspect of a Lathrobium ; but its greatly de- 

 veloped femora, its very deeply sinuated anterior tibiie, and its 

 slender posterior feet (with their rather elongate terminal joint) 

 refer it unmistakeably to Achenium ; whilst even in the shape of its 

 head and prothorax it is intennediate between the two genera. In 

 mere specific details, it may be wcU distinguished by its rufo-fcrru- 

 ginous head and prothorax- — which are regularly and (for an AcJie- 



