32 Mr. T. V. Wollaston on the Coleoptera of St. Helena. 



is no more connected, in reality, with our present fauna than 

 it is with that of any other country where it has in like man- 

 ner been introduced through the medium of commerce. 



68. A Ij)hifohius j^iceus *. 



Tenebrio mauritanicus, Fab. [nee L., 1767], Ent. Syst. i. 113 (1792). 

 Helops picem, Oliv., Ent. iii. 58. 17. 22 (179-5). 

 Tenebrio faqi, Pnz., Fna Ins. Germ. 61. 3 (1799). 

 Alphitobius piceus, WolL, Col. Atl. 419 (I860). 

 , Id., Col. Hesp. 208 (1867). 



Likewise obtained by Mr. ]\Ielliss in St. Helena, but, of 

 course (as in the case of the preceding species), naturalized 

 through the medium of commerce. It has been established 

 equally in the Azores, Madeiras, Canaries, Cape-Verdes, and 

 in Ascension, in which last-mentioned island it was found, in 

 company with the A. diaperinus^ by the late Mr. Bewicke, not 

 in houses and amongst farinaceous substances, as we should 

 have expected, but " in the dung of sea-birds, miles from 

 habitable parts,^^ which is undoubtedly a singular habit for 

 these common and almost cosmopolitan insects to have ac- 

 quired. 



A. ^9/ce?<s may be known from diajjerirms by being a 

 trifle narrower and less shining, by its prothorax being re- 

 latively a little broader, rounder (and more margined) at the 

 sides, somewhat more thickly punctured, and with the hinder 

 angles more acute, by the punctures of its elytral interstices 

 being larger and more numerous, and by its tibia? being ap- 

 preciably less widened, and almost free from (even minute) 

 spinules. Moreover it scarcely attains quite so large a sta- 

 ture as its ally. 



Genus 45. Gnathocerus. 

 Thunberg, Act. Holmiens. 47 (1814). 



69. GnatJiocertis cornutus'^ . 



Trogosita corwHte, Fab., Ent. Syst. (Siippl.) 51 (1798). 

 Cerandria cornuta, Woll., Ins. Mad. 490 (1854). 

 Gnathocertis conmtus, Id., Col. Atl. 420 (1865). 

 , Id., Col. Hesp. 204 (1867). 



Like the last two species, and the two which follow, the 

 almost cosmopolitan G. cornutus has (judging from examples 

 now before me, which were captured by Mr. Melliss) become 

 established in St. Helena, where, no doubt, it must occm-, 

 amongst farinaceous and other substances, in and about the 

 houses and stores. It has in like manner been introduced (of 



