CANARIAN COLEOPTERA. 259 



being studded with two just perceptibly elevated points, or tubercles, 

 will serve to characterize it. Its elytra (which are testaceous, and 

 ornamented, when the insect is mature, wdth two exceedingly black 

 transverse dentate fasciae) are substriated, and closely and finely 

 punctulated, — the punctures, however, having but a slight tendency 

 to be arranged in longitudinal rows. Hitherto I have myself ob- 

 served it only in Hieryo, where I captured it sparingly, from out of 

 dead Euphorbia-steras, during February 1858 ; but I have examined 

 two more individuals which were found by Dr. Crotch, during the 

 spring of 1862, in Gomera. 



418. Aphanarthrum bicolor. 



Aphanarthrum bicolor, Wo/L, lac. cit. 1G5 (18G0). 

 Habitat in Teneriffa, Gomera, Palma et Hierro, Euphorbias emor- 

 tuas destruens. 



The present beautiful Aphanarthrum (which occurs also in Madeira) 

 is not uncommon, in dead EKjohorbia-stems, m TeneriiFe, Gomera, 

 Palma*, and Hierro, in the last of which it was found likewise by 

 Mr. Gray. It may be easily known by its whitish-testaceous hue, 

 and the number of dark patches and broken fasciae with which it is 

 ornamented ; and by its elytra being rather more shining than is 

 the case in the generality of the species, somewhat diaphanous (or 

 subhy aline), most lightly sculptured, and nearly unpubescent — being 

 studded with only a few distant and stiff erect hairs. It is probably 

 universal throughout the archipelago ; nevertheless, as yet, I am 

 unable to record it except for Tencriffe, Gomera, Palma, and Hierro. 



419. Aphanarthrum affine. 

 Aphanarthnxm afRne, IVoll., loc. cit. 166 (1860). 



Habitat in Lanzarota, Fuerteventura, Canaria et Gomera, vulgaris. 



When viewed beneath a high magnifying power, the sculpture of 

 the elytra of this insect (the punctures being more distant mter se, 

 and more evidently disposed in longitudinal rows) would almost 

 suffice to separate it from the other Aphanarthra here enumerated. 

 In minor particulars, its prothorax, which in matured specimens is 

 generally brownish -black with the apex (the extreme margin of 

 which is a good deal incrassated) lurid yellow, is rather coarsely 



* In my Paper on the Aphanarthra I have stated that I captured tlie A. bicolor 

 in Palma, but (through a typ' igrapliical error) the island " Gomera" is recorded, 

 instead of Palma, in tlie habitaf which immediately follows the diagnosis. How- 

 ever, it has subsequently been taken in Gomera also by Dr. Crotch. 



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