54 [March, 



very stout, widened outwards, denseh, rugosely punctate, feebly tricarinate; 

 head deeply foveate between the eyes; antennae with joints 3-7 of funiculus 

 transverse, becoming wider outwards. Pro thorax transverse, rather convex, 

 rounded at the sides, about equally narrowed towards the base and apex ; the 

 disc with an abbreviated, smooth median line terminating; in a longitudinal 

 impression at the base, and a transverse loveiform e.\eavalion on each side just 

 behind the middle, the punctuation uniform. Elytra oblong-oval, somewhat 

 acuminate behind, conjointly rounded at the apex, truncate at the base, the 

 humeri rounded ; rather coarsely punctato-striate, the interstices densely 

 rugulose, uneven, here and there obliquely raised (appearing subareolate), 

 3, 6, and 7 interruptedly costate. Beneath sparsely punctate; uietastenmm 

 and first ventral segment broadly excavate in the middle behind. Tibiae 

 strongly sinuate within. Tarsi clothed wdth short pubescence beneath, 

 joint 3 bilobed. 



Length (excl. head) 5, breadth 2i mm. 



Hal. TiEEEA DEL FuEGO, Hardy Peninsula (C. Darwin). 



One specimen, assumed to be d • This insect must be nearly related 

 to A. dissimilis Fairm., 6 , from Choungougon, Orange Ba}', to judge 

 from the description ; but it has a very rugose, tricarinate rostrum, 

 densely rugulose, uneven elytral interstices, etc. There are no definite 

 tubercles on the elytra and the prothorax is without trace of ocular 

 lobes. 



Antarctohius laticauda, n. sp. 



Elongate-oval, moderately convex, shining, clothed with scattered minute 

 hairs (mostly abraded) ; nigro-piceous above, piceous beneath, the antennae, the 

 basal and apical margins of the prothorax, the suture and outer portion of the 

 elytra, and legs rufesceut. Head and rostrum denseh', uniformly punctate, 

 the latter short, stout, widened outwards, deeply sulcate down the middle; 

 eyes depressed; antennae rather long and slender, the scape reaching to the 

 posterior margin of the eye, joints 1 and 2 of the funiculus long, subequal, 

 3-7 short. Prothorax transverse, rounded at the sides, narrowed anteriorly 

 and constricted behind, the base margined and slightly hollowed in the 

 middle; closely punctate, and with a rather broad median sulcus which 

 becomes deeper towards the base and apex. Elytra oblong-oval, much wider 

 than the prothorax, conjointly produced at the apex into a broad, stout, caudi- 

 form, subtruncate process, which is slightly flattened towards the tip above ; 

 with ten rows of coarse punctures placed in shallow striae, the interstices 

 sparsely, minutely punctate, the alternate ones more or less convex, the others 

 feebly so towards the sides and apex. Ventral segments almost smooth, 2-4 

 subequal in length. Legs rather slender, the femora clavate ; tibiae with a 

 few setae on their inner edge, the anterior pair sinuous within, the others 

 almost straight ; tarsi sparsely clothed with long hairs beneath, joint 3 broad, 

 laminate, feebly emarginate at the apex. 



Length (excl. head) 6^, breadth 2^ mm. ($ .) 



Hah. Chile, Northern part of Tres Montes (C Darwin). 



