232 INSECTA MADERENSIA. 



cially the males) : with the clypeus as in the last species. Prothorax convex, and more quadrate 

 than that of the P. sabulosus, being of almost equal breadth before and behind (though perhaps, 

 if anjihing, a little widest in front) ; beset with large, deep and remote punctures (though not so 

 large or so deep as those of that insect) ; with a deep transverse groove on either side, towards the 

 anterior angles, and a second, obscui-er one behind it ; and with a distinct, though very abbre- 

 viated, longitudinal channel on the hinder disk. Elytra parallel, of equal breadth throughout, 

 crcnate-striated (but less deeply so than in the P. sabulosus) ; with the interstices impunctate 

 and rather flattened, — especially the suture, which is sometimes obscurely picescent. Legs and 

 antenruE rufo-piceous ; the latter with their club ferruginous. 



The very narrow, elongated and cylindrical body of the P. ctestis will at once 

 distinguish it fi'om the remainder of the Aiihodladce ^^ith wliich we are here con- 

 cerned. The piinctTU'es of its prothorax are not quite so large and deep, nor are 

 the interstices of its elytra so convex as is the case with the P. sabulosiis. It 

 does not seem to be a very abundant insect in Madeira, though widely diffused 

 over the island at low and intermediate altitudes. I have taken stray specimens, 

 occasionally, in the streets and gardens of Funchal ; and a single example occiu'red 

 to me in the north of the island, during the summer of 1850, beneath a stone on 

 the lofty sea-cliif which constitutes the eastern boundary of the Ribeiro de Sao 

 Jorge, at its termination : and it has been captured sparingly on the beach of 

 Fimchal by M. Rousset and Professor Hecr, — where its habits are in all proba- 

 bility similar to those of the last species. It is pretty generaUy distributed 

 throughout Em'ope ; and is recorded, likewise, in Algeria. 



Fam. 22. TROGID^. 



Genus 81. TROX. 



Fabricius, Ent. Syst. i. 86 (1792). 



Corpus mediocre, plus minusve obtuso-ovatum, crassum, tuberculato-rugosum et setis rigidis ad- 

 spersum : capite deflexo : prothorace brevi lato, per marginera posticum sinuato : scutello distincto : 

 alis amplis (rarissime obsoletis). Antenna breves (capite vix longiores) lamellato-clavat;e 10-arti- 

 culatee, ad marginem capitis inter otium repositse, articulis primo et secundo robustis sctisque 

 elongatis instructis (illo longissimo subclavato, hoc brevi subgloboso), tertio ad septimum parvis 

 longitudine suba;qualibus latitudine vix crescentibus, reliquis clavam magnam tri])hyllani effici- 

 entibus. Labrum subscmicirculare crustaceum pilosum exsertum, ad apicem plus minusve 

 ina;qualiter emarginatum. MandibulcE validse cornese crassse, estus valde pUosEe, apicem versus 

 incurvJE acutre, margine intcrno in media parte ])rofunde fisso-sinuato et lacinia parva sub- 

 coriacea pubescenti aucto. MaxilUc biloba; subcornea!, lobis subxqualibus ; externa apice setis 

 incurvis longissimis munito; intemo leviter arcuato, apice valde uncinato, intus setoso-ciliato. 

 Palpi leviter clavati; maxillares articulo primo minuto, secundo elongato subclavato, tertio 

 brcviorc, ultimo elongato (secundo longiorc) fusiformi-ovato : labiates articulo primo minuto, 

 secundo longiorc flexuoso subclavato, tertio crassiore elongato subovato. Mentum auiplum sub- 

 quadratum, pilis longissimis munitum, anticc arcuato-emarginatum. Ligula mento occultata. 



