NEW SPECIES OF CARABIDEOUS INSECTS. 369 



found on and near the mesial line : at the apex of the last 

 segment there are from two to four punctures, on either side, 

 and placed in a line : numerous hairs, springing from the 

 punctures, are observable on the sides of the thorax and ely- 

 tra. Length, 85- lines ; width, 3j lines. 



In one of Mr. Darwin's specimens the stricB of the elytra 

 are rather less distinct than in two others from which the 

 above description is drawn up, and the interstices are flat on 

 the fore portion of the elytra ; — it is moreover of a smaller 

 size, being only 7\ Hues in length. 



Mr. Darwin found this species on a sandy plain at Bahia 

 Blanca, N. Patagonia. 



Sp. 7. Odon. suhstriatus. 



Odon. ater, corpore treviusculo, convexo ; elytris substriatis, striis indis- 

 tinctis, interspatiis leviter convexis. 



Thorax rather narrower than the elytra, convex ; the sides 

 rounded, posterior angles also rounded, but very slightly 

 prominent ; dorsal channel indistinct ; scarcely any trace of 

 posterior transverse impression ; elytra convex, their width 

 equal to more than two thirds of the length ; faintly striated, 

 the interspaces slightly concave. Colour dull black ; under 

 parts with a blueish tint. The puncturing on the sides of the 

 thorax, elytra, segments of abdomen, and femora, as usual. 

 The hairs on the sides of thorax and elytra numerous. — 

 Length from 6f to 7j lines ; width from 2f to 3 lines. 



This species is considerably smaller than either of the pre- 

 ceding ; it is proportionately shorter than Odon. Tentyrio'ides, 

 there is less space between the thorax and abdomen, and it 

 is moreover distinguished by its striated elytra. Odon. Ten- 

 tyrio'ides is smooth, or very nearly so ; Odon. substriatus is 

 rather delicately striated, and Odon. striatus is distinctly stri- 

 ated. Odon. substriatus is also intermediate in form between 

 the other two species mentioned, being shorter and rather 

 more convex than the first, and less convex than the last, from 

 which it moreover differs in being naiTower. 



Genus. — Cardiophthalmvs, Curtis. 



Closely allied, as it appears to me, to Odontoscelis, is the 

 genus above named, — a genus (with too long a name) esta- 

 blished by Mr. Curtis, upon an insect brought from Port Fa- 

 mine by Capt. King. ^ I had long since determined to found 



* Linn. Trans, xviii. part 2, page 184. 



