420 



Genus 350. GNATHOCERUS. 



Thunberg, Act. Holmiens. 47 (1814). 



1155. Gnathocerus cornutus. 



Trogosita cornuta, Fab.j Ent. Syst. Suppl. 51 (1798). 

 Uloma cornuta, Erulti, in Webb et Bvrth. (Col) 70 (1838). 

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



1 id., Cat. Mad. Col. 151 (1857). 



Gnathocerus cornutus, Id., Cat. Can. Col. 496 (1864). 



Habitat Maderenses (Mad.) et Canarienses (Fuert., Can., Ten., Go 

 Hierro), in domibns officinisque pistoriis, ex alienis introductus. 



The common and widely spread G. cornutus has established itself 

 both in the Madeiras and Canaries, where it is found principally 

 amongst farinaceous substances in houses and stores. It occurs in 

 the towns and villages of Madeira proper ; and it has been taken 

 sparingly in Fuerteventura, Grand Canary, Teneriffe, Goinera, and 

 Hierro, of the Canarian Group. 



1156. Gnathocerus maxillosus, 



Trogosita maxillosa?, Fab., St/st. Eleu. i. 155 (1801). 

 Gnathocerus maxillosus, Woll., Ann. Nat. Hist. vi. 49 (1860). 

 , Id., Append, huj. op. 61. 



Habitat Maderenses (Mad.), sub cortice Platani laxo etiam in urbe 

 ipsa Funchalensi repertus. 



Detected by myself in Madeira proper, beneath the bark of plane- 

 trees growing in the Praga da Rainha in Funchal. I need scarcely 

 state that it is, as undoubtedly as the G. cornutus, a mere introduction 

 from some other country, though the latter perhaps is more likely 

 (in this case) to be America than Europe*. 



Genus 351. TRIBOLIUM. 

 MacLeay, Ann. Javan. 47 (1825). 



1157. Tribolium ferrugineum. 



Tenebrio ferrugineus, Fab., Spec. Ins. i. 324 (1781). 

 Tribolium castaneum, MacLeay, Ann. Javan. 47 (1825). 

 ferrugineum, Woll, Ins. Mad. 491 (1854). 



* As the maxillosus is the only other known Gnathocerus, I have had but little 

 hesitation in referring the Madeiran insect to it. Nevertheless, as stated in the 

 remarks accompanying my diagnosis in the ' Ann. of Nat. Hist.,' if the latter 

 should prove to be distinct from the Fabrician species, I would then propose for 

 it the trivial name offakatus. 



