64 APPENDIX. 



perceptible only under a strong lens), as well as quite free from 

 tubercles and transverse rugce. 



Helops arboricola. 



H. subcylindrico-oblongus, ater, subopacus ; capite prothoraceque 

 confertissime punctulatis (punctis subconfluentibus), hoc longius- 

 culo, utrinque versus basin plus minus valde sinuato, angulis pos- 

 ticis plus minus acutis ; elytris subparallelis, densissime et minute 

 granulatis (granulis versus suturam obsoletis), crenato-striatis, 

 interstitiis tuberculis parvis remotis longitudinaliter obsitis ; an- 

 tennis pedibusque elongatis. Long. corp. lin. 7. 



Helops arboricola, Wott., Ann. Nat. Hist. x. 338 (1862). 



Habitat in Maderse intermediis, a Dom. Bewicke sub cortice lauro- 

 rum laxo parce lectus. 



Detected in Madera proper by the late Mr. Bewicke. 



Helops gomerensis, n. sp. 

 H. congeneri affinis, sed paulo major, depressior, antennis pedibusque 

 (saltern in sexu masculo) multo longioribus ; clypeo apice rectius 

 truncate ; prothorace elytrisque ad basin sensim magis angustatis, 

 illo vix levius parciusque punctato, his paulo profundius crenato- 

 striatis, in interstitiis convexioribus et (oculo fortiter armato) 

 evidentius alutaceis, minus punctulatis (punctis ssepius obsoletis) 

 sed magis evidenter (tamen minute ac valde obsolete) seriatim 

 tuberculatis. Long. corp. lin. 5-7. 



Habitat Gomeram, a DD. Crotch copiose repertus. 



Considering the great variability of the H. congener, I at first 

 thought it not unlikely that the present Helops (sixteen examples of 

 which, taken by the Messrs. Crotch in Gomera, are now before me) 

 might be some insular modification of that species ; and even still I 

 would not be quite positive that such may not, in reality, be the 

 case ; though, as it seems in some respects to be more on the type 

 of the Teneriffan //. altivagans and elliptipennis, I think it would 

 be rash to treat it as a mere phasis of the congener. It differs from 

 that insect in being on the average a little larger, and in having its 

 limbs (at any rate in the male sex) much more elongate. Its clypeus, 

 also, is more straightly truncated at the apex; its prothorax and 

 elytra are a trifle more drawn in at their respective bases ; and the 

 latter are more deeply striated, with their interstices more alutaceous 

 and convex, less evidently punctulated (the punctures being usually 

 obsolete), but with a rather more decided tendency to be longitudi- 

 nally studded (posteriorly and towards the sides) with very remote 

 and minute tubercles. 



