CANAKIAN COLEOPTEEA. 93 



150. Chgetarthria similis, n. sp. 



G. valde affinis C. semimdo, sed vix (nisi fallor) mcra varietas gco- 

 graphica: sensim major et (oculo fortiter armato) argutius punctata, 

 prothorace ad latcra ipsissima vix grossius marginato ct ibidem (ut 

 in elytrorum apice) clarius dilutiore, antennis, palpis pedibiisque 

 paulo pallidioribus. — Long. eorp. lin. 1. 



Habitat in humidis et aquosis Canari8e,Teneriffa3,Gomera3 et Palma?, 

 rarissimus. 



Although very closely aUied to the common European C. seminu- 

 lum, I think that the present Chcetarthrla can scarcely be referred 

 actually to that species. It is, on the average, perceptibly larger, 

 and when viewed beneath a high magnifying power will be seen to 

 be much more sharply and distinctly punctured. The sides of its 

 prothorax, as well as the apex of its elytra, are more diluted in hue ; 

 and the former is perhaps a trifle more coarsely margined at its ex- 

 treme lateral edges. Its limbs, too, are altogether a shade paler. It 

 appears to be decidedly rare, though widely spread over the archi- 

 pelago. I have taken it in moist spots in the region of El Monte, of 

 Grand Canary, as weU as in Palma ; and it was found by Dr. Crotch 

 in Teneriife and Gomera. 



Fam. 7. SPH^RIDIAD^. 



Genus 58. CYCLONOTUM. 

 (Dejean) Erich., Kqf. der Mark Brand, i. 212 (1837) 



151. Cyclonotum orhiculare. 



Hydrophilus orbicularis, Fab., Ent. Syst. i. 184 (1792). 

 Hydrobius orbicularis, Stejdi., III. Brk. Ent. ii. 132 (1829). 

 Cyclonotum orbiculare, Erich., Kiif. der Mark Brand, i. 214 (1837). 

 Ccelostoma orbiculare, BndU, in Webb et Berth. (Col.) -58 (1838). 



Habitat in aquosis Euerteventurge, Canarioe, Teneriffse, Gomerse et 

 Palmse, vulgaris. 



This insect, so abundant throughout the whole of Europe, is pro- 

 bably universal at the Canaries, — though I do not hapi^cn to have 

 observed it in either Lanzai'ote or Hierro (the extreme eastern and 

 the extreme western islands of the archipelago) ; but in Euerteventura, 

 Grand Canary, TenerifFe, Gomera, and Palma I have tak(>n it, more 

 or less abimdantly. In Euerteventura and Gomera it was likewise 

 found by Mr. Gray ; in Tencriffe by M. Ilartung ; and in TenerifFe 

 and Gomera by Dr. Crotch. 



