476 CANAUIAN COLEOPTEUA. 



versely, so as to cause the ridges (which are narrowish and aiigiilar) 

 to seem as though delicately subimdulated, will serve to separate it 

 from its allies. As in the P. costipenms, its elytral tubercles are 

 so far reduced in dimensions as to take the form of smaU and remote 

 granules (Avhich are nearly evanescent on the sutiiral interval) ; and 

 its subsutural ridge is rather suddenly curved outwards at the base. 

 It appears, to a certain extent, to be intermediate between that 

 insect and the ascend ens, having rather the outline of the latter, 

 with somewhat the sculpture of the former ; nevertheless, of the 

 two, it is certainly jnore akin to the costipennis, and might possibly 

 be a Teneriffan phasis of that species, 



717. Pimelia costipeimis, n. sp. 



P. subnitida ; capite antice profunde, postice minute et parce punc- 

 tate ; j)i"othorace minutissime ct parcissime punctulato, utrinque 

 tuberculis magnis obsito ; elytris ovalibus, tuberculis parvis sub- 

 asperatis granuliformibus (versus suturam minus distinctis) ob- 

 sitis, in limbo leviter serratis, singulis costis tribus (praeter latera- 

 lem) valde elevatis (sublaterali incHstincte tuberculato-subserrata) 

 instructis, interstitiis subconcavis ; antennis rufo-piceis. 

 a. Paulo minor, pedibus graciUoribus, rufo-piceis. \^Ins. Hierro.] 

 j(3 (yalidipes). Paulo major, pedibus robustioribus, piceis. \_Ins. Go- 

 mera.] — Long. corp. lin. 7-11. 



Habitat in Gomera et Hierro, hinc inde vulgaris : insectum vile, 

 valde spernendum ; in stercore humane arido sese occultare delectat. 



I can detect no difference between the states a and /3, above enun- 

 ciated, except that the former (which abounds in Hierro) is a little 

 the smaller of the two, and has its limbs slenderer ; whilst the latter 

 (which is apparently general throughout Gomera) is perceptibly 

 larger, and with the legs thicker. I therefore conclude that they 

 are but insular phases of a single species. The " /3 " was taken by 

 Mr. Gray and myself near San Sebastian, and was subsequently com- 

 municated by the Barao do Castello de Paiva from Hermigua (on the 

 opposite side of the island). 



The P. costipennis may be known by its prothorax being very 

 sparingly and most minutely punctulated, and by its elytra being 

 sprinkled all over with small, but remote, granuliform tubercles 

 (which, however, are less evident towards the suture), and with their 

 costse much raised — the sublateral one being indistinctly serrated 

 (sometimes quite plain in the middle), whilst the discal and sub- 

 sutural ones (the latter of which is faint, and a good deal bent out- 

 wards at the base) are simple, except quite behind. The great eleva- 



