Species of the American Genus Astyius. 359 



insect ; tlie el^'tra flavous, with two broad vitt-£e (discoidal 

 and submar^inal), and a spot before tlie apex, black ; tlie 

 anteunte, tibise, and tarsi testacoous; the terminal dorsal 

 abdominal se^nK'nt: with a loni;- ])rocess on each side. 

 A. forcipatus is not unlike the insect here identified as 

 A. jatahi/evst's, Pic, and is somewhat similarly coloured — 

 except tliJit the j)rothorax is wholly black and the subapical 

 spot on the elytra is testaceous (instead of" black) — difTering 

 from the latter in having a rou<2,her, less convex prothorax, 

 a stout costa on the disc of the elytra, &c.* 



30. Astyius convexus, sp. n. 



Elongate oval, rather convex, very shining, sparsely pilose ; 

 metallic blue, the basal joiiits of the antennae in great part 

 rufo-testaceous, the elytra testaceous, with the suture narrowly 

 and two broad stripes on the disc (united ])ostcriorly in one 

 specimen) cajruleous, the legs black; the head closely, finely, 

 the prothorax sparsely, somewhat coarsely, and the elytra 

 very coarseh^, punctate. Head rather broad; antennse (^S^ 

 long and comparatively stout, the joints longer than broad, 

 in $ a little shorter. Prothorax transverse, ample, rounded at 

 the sides, the margins strongly reflexed. Elytra moderately 

 long, somewhat acuminate at tip, without trace of costse, the 

 humeri obtuse. Wings wanting. Legs moderately elongate. 



^ . Anterior tarsi with joint 2 drawn out into an oblique 

 tooth, and 3 angulate, at the inner apical angle. Ventral 

 segment 5 deeply arcuato-emarginate, 6 short, notched at 

 tip. Penis-sheath drawn out into a long point at apex. 



Length 5-5^, breadth 2^ mm. (d" ? .) 



Hah. Peku, Chanchamayo (Tliamm). 



One male and two females. A rather convex, apterous, 

 metallic-blue insect, with testaceous, cseruleo-bilineate elytra. 

 Not unlike A, pnllipes, Kirsch, from Ecuador, but more 

 convex, the antenna? longer and stouter, the [)rothorax more 

 ample and with strongly reflexed margins, the humeral callus 

 obsolete, the legs black, the wings (so far as can be seen 

 without opening the elytra) wanting. This species may 

 have to be removed from Astyius. The long antennte, &c., 

 separate A. convexus from the Chilean genus Arthrobrachus. 



• In the Fry Collection there is a damaged S of an allied larger form 

 from La Paz, Bolivia, with entirely testaceous legs, the abdominal pro- 

 cesses wanting, &c. It cannot be referred to A. buliviejisis or exclama- 

 tionis, Pic, from the same country. 



