104 



CANAEIAN COLEOPTERA. 



169. Acrotrichis sericans. 



Tricliopteryx sericans, Heer, Fna Hclv. i. 374 (1841). 



, Erich., Nat. der Ins. Dcidsch. iii. 23 (1848). 



depressa, Redt., Fna Austr. 149 (1849). 



Habitat in Caiiaria, TenerifFa, Gomera et Hierro, sat rara. 



At once known from the preceding three species by its smaller size 

 and more deeply punctm-ed surface, by its outline being iisuaUy (if 

 anything) rather wider behind than in front, by the much less pro- 

 duced posterior angles of its prothorax, and by its darker antennae. 

 It is considered by Mr. Matthews to be identical with the European 

 A. sericans*. So far as I have observed hitherto, it appears to be some- 

 what rare in these islands. I have taken it sparingly near Teror 

 in Grand Canary, as also in TeneriiFe and Hierro ; but it has been 

 captui'ed more abundantly in Gomera, by Dr. Crotch. 



Genus 68. NEPHANES. 

 Thomson, Skandht. Coleopt. i. 62 (1859). 



170. Nephanes abbreviatella. 



Trichopteryx abbreviateUus, Heer, Fna Helv. \. 375 (1841). 



cm-ta, Gillm., in Sturm, Deidsch. Fna, xvii. (1845). 



abbreviatelkis, Erich., Nat. der Ins. Deutscli. iii. 23 (1848). 



Titan abbreviatelkis, Matth., in Zool xvi. GllO (1858). 



Elacbys abbreviateUus, Woll, Ann. Nat. Hist. (3rd series) v.221 (1860). 



Habitat TenerifFam et Gomeram, a cl. W. D. Crotch deprehensa. 



This very minute insect (which is rather common beneath decaying 

 vegetable refuse around Funchal, in Madeira) altogether escai)ed my 

 own observations at the Canaries. Several undoubted examples of it 

 have, however, lately been communicated to me by Dr. Crotch, who 

 captured them in TenerifFe and Gomera during the spring of 1862. 

 Those from the former island were found at Ycod el Alto, and those 

 from the latter above Hermigua. 



Genus 69. PTENIDIUM. 

 Erichson, Nat. der Ins. Deutsch iii. 34 (1848). 



171. Ptenidium laevigatum. 



Trichopteryx laevigata, Gilhn., in litt. 



Ptenidiimi Ijevigatum, Erich., Nat. der Ins. Detdsch. iii. 36 (1848). 



, Fairm. et Lab., Faun. Frang. 340 (1854). 



Habitat in Canaria, TenerifFa, Gomera, Palma et Hierro, rarior. 



* I should perhaps state, however, that, on a subsequent examination of two 

 of my specimens, Mr. Matthews fcU a little doubtful whether they should not 

 rather be referred to the (European) T. hrcvipc7inis. 



