Mr. Waterhouse on Carabideous Insects. 125 



obliterated, and on the second of these, or the third from the suture, 

 are two distinct, impressed points, the foremost situated towards 

 the base of the elytra, and the other near the middle ; on the outer 

 margin of each elytron are three distinct striae ; that nearest the mar- 

 gin has numerous impressed points, and these imjiressions become 

 more near to each other as they approach the apex of the elytra. 

 The antennae are rather shorter than the head and thorax taken 

 together, testaceous red at the base, and becoming paler towards 

 the tip, and the palpi are of the same colour ; the legs are pitchy 

 red, and the thighs are pitchy; the outer margins of the elytra are 

 pitchy beneath. 



Mr. Darwin found numerous specimens of this species both at 

 Valparaiso and Concepcion ; they vary a little in the form of the 

 thorax ; most of the Valparaiso specimens are a trifle smaller, and 

 have the thorax rather narrower than those from Concepcion ; but 

 there are others from Valparaiso, which perfectly agree with the 

 Concepcion specimens, and some which are intermediate. 



Sp. 13. Feronia (Poecillus) Peruviana, Dejean, Spe. gen. des 

 Coleop., tom. iii. p. 233. 



The collection contains several specimens from Callao. 



Sp. 14. Feronia (Poecillus) Chaudoirii, Guerin, Mag. de Zool. pi. 

 227. fig. 3. ? 



An insect brought by Mr. Darwin agrees very well with Guerin's 

 description of F. Chaudoirii ; it is closely allied to the F. unistriatus 

 of Dejean, but, judging from his description (for I unfortunately 

 have no specimens for comparison), it differs in having the frontal 

 sulci w^ell marked, the mandibles pitchy red, and in being rather 

 larger, viz. 5^ lin. etc. ; but upon turning to Guerin's fig. 3. of 

 pi. 227, I find an insect represented which does not at all agree 

 with the description of Chaudoirii. I should imagine the figure to 

 be that of some other genus ; it is very like a species of Melanotus : 

 there must be some mistake. 



Sp. 15. Feronia (Pcecillus) Guerinii. 



Fer. nigra, nitida ; thorace subquadrato, sulco dorsali mediocri 

 impresso, nee non postic^ foveis duabus, punctulisque ; elytris 

 distinct^ striatis, striis subpunctatis ; antennis, palpis tarsisque 

 piceis. 



Long. Corp. 5 lin. ; lat. 2 lin. 



Hab. Patagonia ? 



But one specimen of this species was found by Mr. Darwin, at 

 sea, about sixty miles from the nearest land (but much further in the 

 direction of the wind), Rio de la Plata. In size it is intermediate 

 between the F. Peruviana and the F. vnisiriata, and it is easily distin- 

 guished from both these species by its elytra being distinctly striated 

 throughout, the striae being punctured, aad there being small scat- 

 tered punctures on the hinder portion of the thorax, between the 

 posterior foveae ; compared with Poecillus cupreus, it presents the 

 following differences : size a trifle smaller, general form rather nar- 



