Carabideous Insects from the Straits of Magellan. 137 



postic^ foveis duabus magnis impresso : elytris ovatis, postice ob- 



tusis, leviter striatis, striis internis subpunctatis.' Long. corp. 4f 



lin. ; lat. 1\ lin. 



Hub. Tierra del Fuego. 



Head broad and depressed, with a very shallow fovea on each 

 side near the eye, and another in front of each of these. Thorax 

 about one-third broader than the head, broader than long, but little 

 convex above ; the posterior margin slightly sinuous, the lateral mar- 

 gin somewhat rounded, the sides being dilated in the middle ; the an- 

 terior and posterior angles nearly in the form of right angles ; an 

 impressed line runs parallel with and close to the lateral margins ; 

 the dorsal channel is distinct, and commences at the anterior margin 

 of the thorax and terminates at a short distance from the posterior 

 margin ; on either side, behind, is a largish shallow fovea, and there 

 is a second small and indistinct fovea close to the posterior angle. 

 Elytra about one-third broader than the thorax, and less than one- 

 third longer than broad ; nearly ovate, but obtuse and rounded be- 

 hind ; the surface but' little convex, striated, the strise distinct near 

 the suture and having a faint trace of punctures ; on the outer half 

 and apical portion of the elytra the striae are very nearly obliterated ; 

 the interspaces are flat and smooth. The upper surface of the head, 

 thorax and elytra is of a blackish green hue and glossy ; the under 

 parts of the head and body are black ; the legs and four basal joints 

 of the antennae are pitchy red, but the second joint of the antennae 

 is black at the base ; the palpi are black, with the extremities of the 

 joints pitchy. 



Plate III. fig. 2 a, labium and mandibles; 2 6, mentum ; 2 c, maxilla; 

 2 d, fore tarsus of male; 2 e, middle tarsus of ditto. 



The insect from which the above description is taken, somewhat 

 resembles an Helohia, and in the form of the head, thorax and body 

 is ver)^ dissimilar to the generality of the HarpuUdce, though it has 

 the four anterior tarsi distinctly dilated in the males. It appears to 

 form a connecting link between the family just mentioned and the 

 genus Antarctia. 



Mr. Darwin's notes state that this species is abundant under stones, 

 &c. in the damp forest of Navarin Island. The specimens were col- 

 lected there in the month of January. Mr. Darwin also found the 

 same species in the month of December at the summit of Hunter's 

 Peak, an abrupt cone of greenstone 1700 feet high, in Hermite Island 

 near Wigwam Cove, not far from Cape Horn. It was found at Hardy 

 Peninsula in the month of March, and " under bark " at Port Famine 

 in February. 



Migadops Falklandicus . — Mig. nigro-viridis ; corpore subtiis piceo ; 

 antennis ad basin femoribusque j)iceo-rubris ; thorace transverse, 

 lateribus paulo dilatatis, postice transversim impresso atque punc- 

 tulato ; elytris latis, ovatis, subdeprcssis, postice obtusis, punc- 

 tato-striatis, interstitiis paulo convexis. Long. corp. 4y lin. ; lat. 

 2^ lin. 



Hub. East Falkland Island. 

 Head witli a few waved transverse ruga; between the eyes, im- 



punctatc : thorax transverse, broadest in the middle, and but slightly 



