APPENDIX. 25 



Genus LATRIDIUS. 

 Herbst, Natursyst. v. 8 (1793). 



Latridius delectus. 



L. elongatus, angustus, ferrugineus ; capite prothoraceque profunde 

 rugoso-punctatis, illo sat magno subquadrato, hoc subquadrato 

 basi leviter angustato ; elytris parallelis, profunde seriatim punc- 

 tatis (punctis magnis), sutura interstitiisque alternis alte elevatis. 

 Long. corp. lin. |. 



Lathridius delectus, Woll, Ann. Nat. Hist. ii. 409 (1858). 

 Habitat Maderam australem, in inferioribus rarissimus. 



Genus METOPHTHALMUS. 

 Wollaston, Ins. Mad. 192 (1854). 



Metophthalmus asperatus. 



M. oblongus, rufo-ferrugineus elytris nigrescentibus ; capite protho- 

 raceque inaequalibus, illo in fronte longitudinaliter binodoso necnon 

 utrinque costato ; elytris ad humeros obtuse subrectis, profunde 

 seriatim punctatis, interstitiis alternis costato -elevatis. Long, 

 corp. lin. j 1. 



Metophthalmus asperatus, Wall, Ins. Mad. 193, tab. iv. f. 4 (1854). 

 , Id., Cat. Mad. Col. 67 (1857). 



Habitat Maderam sylvaticam, sub cortice arido necnon inter lignum 

 aridum antiquum hinc inde sat vulgaris. 



Three very distinct MetopJiihalmi having now been detected in 

 Madeira, and two at the Canaries, I have thought it desirable to 

 give (in addition to those of the new ones) a short and corrected 

 diagnosis even of the species which have already been described, 

 in order that the more salient points in which they differ from each 

 other may be better understood. In insects thus minute, however, 

 I have not considered it necessary to advert to the exact proportions 

 of their antennal joints, though a careful comparison of them under 

 the microscope will show that there are nevertheless, in each case, 

 slight but positive distinctions which will further tend (when seen) 

 to characterize the several exponents of the group. 



The Madeiran M. asperatus is the largest of the ge'nus yet detected, 

 and it is likewise more oblong and parallel than any of the remainder. 

 The colour too of its head and prothorax, in mature specimens, is 

 always of a ferruginous red, whilst the elytra are darker being, 

 more or less, of a piceous-black. 



