592 INSECTA MADERENSIA. 



rocks towards the upper extremity of the Ribeiro de Santa Luzia ; and at the 

 Ribeiro Frio, Sao Vinccnte and Santa Anna : as also, though more sparingly, in 

 Porto Santo and on the Dezerta Grande. It is found in most parts of Eiu'ope and 

 the north of Africa, but seems to be more plentiful in the higher districts than in 

 the plains. Thus I have observed it in profusion on the S'wiss xUps, on the 

 English and Scotch moorlands, and on the mountains of Ireland and "Wales. 



Genus 204. RUGILUS. 



(Leach) Curtis, Brit. Ent. iv. 168 (1827). 



Corpus sat parvum, elongatum : capite lato subvotundato porrecto exserto, pedunculo tcnui brevi pro- 

 thoraci affixo ; oculis mediochbus subrotundatis : pruthorace subovato apice attenuate, plus 

 minusvo distincte cariuato : alhi jjlorumque amplis : ahdomine inarginato, basin versus angustato, 

 segmento sexto in maribus subtus exciso, in foeniinis integro rotundato. ^n/ennff rectse, filiformes 

 breviusculse crassiusculre, articdo priiuo longiusculo leviter robusto, ultimo acuminato-ovato. 

 Lnbrum amplum, limbo laterali rotundato submembranaceo, apice bidenticulatum. Mandihula, 

 maxilla, palpi, mentum et liyula fere ut in Lithocharide, sed puraglossi longiores. Pedes parum 

 elongati : tarsis 5-articuIatis siraplicibus, articulis quatuor baseos (pi-sesertim in posterioribus) 

 loneitudine leviter decrescentibus. 



'&' 



The coarsely and closely punctui-ed head and prothorax of the Riigili (the former 

 of which is wide and subrotundate, whilst the latter is greatly acuminated in front 

 and more or less, evidently keeled down the centre), in conjunction with then- 

 rather short and robust antenna, ample upper-lip, somewhat elongated legs, and 

 simple feet, vdW serve, apart from minor characters, to distinguish them from 

 tlicir immediate allies. They constitute the genus Sfillcus of Latreille [Hegne 

 Animal, iv. 436, a.d. 1829). Their habits arc much the same as those of the 

 Lithocharides, — the species occurring beneath stones, fallen leaves, and decajdng 

 vegetable substances in damp spots. 



463. Rugilus affinis. 

 R. niger, capite prothoraceque creberrime ruguloso-punctatis, hoc carina media glaberrima notato, 



elytris nitidis parcius et subtilitcr punctulatis apice testaceis, antennis piceo-ferrugineis, pedibus 



testaccis, tibiis et femorum posteriorum apice fuscescentibus. 

 Long. Corp. lin. l|-2. 



StiUcus affinis, Erich. Kiif. dcr Mark Brand, i. 522 (1837). 

 Euffilus affinis, Heer, Fna Col. Heh: i. 2.32 (18-11). 

 Stilicm affnis, Eedt. Fna Austr. 720 (1849). 



Habitat sub lapidibus foliisque arborum dcjectis in humidiusculis Maderse, sat frequens. 



R. black. Head and prothorax most closely and roughly punctured, and opake ; the former large, 

 wide, and nearly round, with the palpi piccous ; the latter considerably acuminated in front, and 



