Mr. Waterhouse on Carabideous Insects. 123 



is of a black colour, but may be distinguished from that species by 

 its smaller size, the thorax being almost as broad behind as before, 

 and the jialpi, basal joint of the antenna; and the tarsi being pitchy 

 red. 



Sp. 7. Feronia (Pterostichus) Bonellii. 



Fer. aptera, atra ; thorace cordato, postice utrinque bistriato ; 

 elytris elongato-ovatis, striatis, striis obsolete striatis ; antennis 

 ad basin piceis ; palpis tarsisque rufo-piceis. 



Long. corp. 5| — 5| lin. ; lat. l-p^-^ — 2 lin. 



Hab. Ynche Island, Chonos Archipelago; Valdivia, andE. Chiloe. 



This species is about the same size as the Feronia oblongo-piinctata, 

 and it also approaches that insect in form ; the head is rather nar- 

 rower, the thorax is narrower, longer, and more attenuated behind ; 

 the elytra are of the same ovate form, but a trifle more elongated ; 

 the antennae are also longer. It has the general form and appear- 

 ance of the species of Bonelli's genus Pterostichus. 



The eyes are moderately prominent, and the frontal sulci are short 

 and rather deep ; the thorax is rather depressed, as long as broad, 

 considerably attenuated behind, and the posterior angles are right 

 angles ; there is sometimes a slightly impressed transverse groove 

 in front, and there is also, in some individuals, a transverse groove 

 behind ; the dorsal channel is not very distinct ; the posterior fovea, 

 on each side, is in the form of a narrow long groove, and is impunc- 

 tate ; the elytra are elongate-ovate, distinctly striated, and the 

 striae are generally faintly punctured, especially those nearest the 

 suture and towards the base of the elytra ; but this is not constant, 

 in some specimens the strise being impunctate ; the elytra are sHghtly 

 sinuated at the apex and have some distinct impressed points on 

 this part ; there are also one or two impressions on the third stria 

 from the suture ; the palpi and tarsi are pitchy red, and the three 

 basal joints of the antennae are pitchy. 



The specimens from Ynche Island have the elytra more deeply 

 striated than those from ^^aldivia ; one of the Valdi\aa specimens is 

 considerably broader than the others, and the elytra have a purplish 

 hue. 



Sp. 8. Feronia cerea-, Dejean, Spe. gen. des Coleop. torn. iii. p. 279. 



This appears to be a common species in the neighbourhood of 

 Valparaiso. 1 have seen many specimens from that locality, — Mr. 

 Darwin's collection contains five. It is very nearly equal in size 

 to the F. Corinthia, and of the same brassy black colour ; it differs 

 however in having the thorax less convex, rather longer, not so 

 narrow behind, and less suddenly contracted at this part ; the elytra 

 are rather deeply striated throughout and are impunctate. 



The Omaseus marginalis of Curtis (Linn. Trans, vol. xviii. p. 191) 

 I have compared, and found to agree with these specimens ; they 

 however appear to me to agree with Dej can's description of F. cerea, 

 and in Mr. Hope's cabinet there is a similar insect bearing the same 

 name. 



