1018.] 4/ 



and witli a shallow anteriorly evanescent sutiiral stria : metasternum closely, 

 souievvbat coarsely, the ventral segments very sparsely, minutely, punctate. 

 Antennae reaching the base of the prothorax, joints 7-9 becoming progressively 

 wider, 7 and 8 shorter and smaller than 9-11, the latter about equal in width. 

 Prothorax convex, transverse, rounded at the sides, narrowed anteriorly, the 

 angles obtuse. Scutellum small. Elytra oblong, a little wider than the pro- 

 thorax, rounded at the sides anteriorly, broadly truncate at the tip. Posterior 

 tibiae .sinuously bowed inward towards the apex, and the basal joint of the 

 anterior tarsi slightly thickened, in c?. 

 Length U, breadth | mm. (c? $ .) 



Hah. Chile, Cbiloe Island (C. Darwin). 



One pair, numbered 2369 in Darwin's register. The}^ were captured 

 in 1834. 



Hydxobius Schmidt. 



Hydnohius forficornis^ d. sp. 



Oblong-elliptic, convex, rufo-testaceous, shining. Head broad, impressed 

 with a few minute scattered punctures; antennae with the 5-jointed club 

 greatly developed, as long as the other joints united, 7, 9, and 10 strongly 

 transversa, subequal. Prothorax gradually narrowed from the base, the sides 

 almost straight, the anterior angles rounded, the hind angles obtuse ; the base 

 immarginate ; very sparsely, minutely punctate. Elytra rapidly narrowing 

 from a little below the humeri, obsoletely, irregularly, striato-punctate, the 

 interstices flat, sparsely, very minutely punctate, and also faintly transversely 

 strigose, the sutural stria deeply impressed. Tarsi slender. 



Length If mm. ($.) 



Hah. Chile, Chiloe Island (C. Darwhi). 



One specimen, numbered 2869, obviously $ , the posterior femora 

 being unarmed. This insect must be nearly related to H. consohriiius 

 Fairm. et Germ. (1859), type 6 , from Concepcion, Chile ; but the 

 latter, to judge from the description, has the prothorax not so smooth 

 and more rounded at the sides, and the elytra more coarsely punctate- 

 striate, with the interstices transversely rugose. Comj^ared with the 

 European H. strigo^us Schmidt the upper surface in H. forticornis is 

 much smoother, the prothorax and elytra are less rounded at the sides, 

 the prothorax wants the marginal groove at the base, and the antennal 

 club is as strongly developed as in the allied holarctic genus Triartliron. 

 The discovery of a second species of Hydnohkis in Chile is interesting 

 from the point of view of geographical distiibution. It maj' be noted 

 that typical representatives of the genera Anisofoma, Cyrtusa^ Colenis, 

 and Colon have been recorded from Central America, all unexpected 

 additions to the fauna of that region. 



