512 CANABIAN COLEOPTERA. 



764. Ditylus concolor. 

 Z). elongato-cylindricus, laetissime aurantiaco-testaceus, pube grossa 

 demissa aurautiaco-testacea densissime tectus ; prothorace cordato, 

 inaequali (postice canaliculato, in disco utrinque longitudinalitei- 

 bi-impresso). — Long. corp. lin. 4-7. 



Ditvlus concolor, Bridle, in Wehh et Berth. (Col.) 70. pi. i. f. 13 (1838). 

 ^ fulvus, IFolL, Lis. Mad. 523 (1854). 



Habitat in Canaria, Teneriffa, Gomera et Palma, sub lapidibus 

 necnon juxta radices plantarum (praesertim Euphorhiarum) latens. 



This elegant Ditylus, so remarkable for its pale, orange-yellow 

 surface, which is densely clothed with decumbent pubescence of a 

 similar colour, is (although decidedly scarce) widely spread over the 

 Canarian archipelago, where in all probability it is universal. It was 

 taken rather commonly by the Rev. R. T. Lowe at Arguiniguin, in 

 the south of Grand Canary, on the 15th of April 1858 ; and I have 

 myself obtained it from the vicinity of the Puerto Orotava, as well 

 as below Taganana, in Teneriffe, and from the Barranco de Nogales 

 in Palma. In Gomei'a it was found by Dr. Crotch ; and Teneriffan 

 examples have likewise been communicated by the Barao do Castello 

 de Paiva. It seems to be conspecific with the Diti/lus which I de- 

 scribed, in a foot-note of my ' Ins. Mad.,' from the rocks of the Salvages 

 (where it was captured, in 1851, by Mr. Leacock, of Funchal) ; and 

 is also very nearly alhed to a species which occurs at the Cape de 

 Verdes, and which, although with small and constant distinctions of 

 its own, may possibly be but a geographical modification of it*. 



Genus 288. ISCHNOMERAt. 

 Stephens, HI. Brit. Ent. v. 53 (1832). 



705. Ischnomera melanura. 



C'antharis melanura, Linn., Syst. Nat. ii. 651 (1767). 

 Ischnomera melanura, Steph., III. Brit. Ent. v. 54 (1832). 



* This Ditylus I described, in the 'Ann. of Nat. Hist.' in 1861, under the 

 trivia] name of fallidus ; and I there stated that " it is not only of a much more 

 pallid hue than the concolor (being of a pale testaceous, and entirely free frt^m 

 the beautiful orange tint which is always so conspicuous in that insect), but its 

 pubescence is distinctly longer and coarser (particularly behind), its eyes are more 

 prominent, its pronotum is somewhat Jess uneven, and the first joint of its an- 

 tenna; is perceptibly tliicker — a structm-e which is very apparent at the base." 



t Although Stephens's genus Ischnomera is composed of several insects which 

 have since been erected into separate genera, nevertheless, since he takes the Can- 

 tharis melanura as his type, and even expresses his conviction that the yroiip re- 

 quires in reality further subdivision, it seems most iinfair to give the preference 

 to Nacerdes of Schmidt, which was established (to receive that, and one other, 

 insect) fourteen years afterwards. On this principle almost any of the old genera 

 might be summarily disposed of by subsequent, and more accurate, analyzers. 



