M. Coste on the Habits of some Marine Animals. 197 



crenato-etriatia, plus minus (prsesertim circa humeros) dilutioribus, 



antennis, palpis pedibusque testaceis. 

 Variat immaturus colore fere testaceo. 

 Long. corp. lin. 2f-3£. 

 Habitat in insulis Canariensibus sub pedibus truncisque arborunl 



prolapsis, hinc inde baud infrequens. 



C. elongate-oblong, blackish brown (when immature, pale), 

 and more or less densely clothed with a cinereous pile. Pro- 

 thorax most closely and minutely punctulated all over; very 

 large ; exceedingly convex on the disk ; widest about the middle, 

 and with the sides regularly rounded ; with the hinder angles 

 produced and acuminated ; and with the extreme front margin 

 more or less rufescent. Elytra more or less diluted in colouring, 

 — especially about the shoulders, which are sometimes almost 

 rufescent ; rounded at the sides (being widest about the middle) ; 

 and regularly and deeply crenate-striated. Antenna, palpi and 

 legs testaceous. 



The present beetle I conceive to be identical generically with 

 the Porto-Santan Coptostethus femoratus (Ins. Mad. 240. tab. iv. 

 f. 8) ; and it is the only member of the Elateridce which I have 

 been able to detect during a six months' research in the Canary 

 Islands. It differs slightly, however, even in its structural cha- 

 racters, from that insect, and it is just possible therefore that 

 it may prove eventually to be the type of a separate, though 

 closely allied, genus ; but I defer the consideration of its affini- 

 ties until a future opportunity (when I shall have had leisure 

 for dissecting the parts of its mouth), contenting myself now 

 with simply securing the species, which I believe to be unques- 

 tionably new. Should it prove to be a true Coptostethus, it will 

 be of the greatest interest geographically, as establishing a 

 powerful connecting link (like many others hereafter to be no- 

 ticed) between the Madeiran and Canarian groups ; for whilst 

 the C. femoratus is the only representative of the Elaterida 

 which I have hitherto observed in the former, the present insect 

 (which has precisely similar habits) would seem, singularly 

 enough, to be the sole exponent of that immense family in the 

 seven large islands of the latter. 



XXII. — On the Habits and Reproduction of some Marine Animals. 

 By M. Coste*. 



By the generosity of the Emperor, and the kindness of the 



Minister of Public Works, I have been enabled to place the 



pilot Guillou in a position to organize, in the shed which covers 



* Translated from the 'Comptes Rendus,' July 12, 1858, p. 45. 



Ann. Z$ Mag. N. Hist. Ser. 3. Vol. ii. 14 



