Species of the American Genus A stylus. 359 



insect ; the elytra flavous, with two broad vittae (discoidal 

 and submarginal), and a spot before the apex, black ; the 

 antennae, tibiae, and tarsi testaceous; the terminal dorsal 

 abdominal segment with a long process on each side. 

 A. forcipatus is not unlike the insect here identified as 

 A. jatahyensis, Pic, and is somewhat similarly coloured — 

 except that the prothorax is wholly black and the subapical 

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

 from the latter in having a rougher, less convex prothorax, 

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



30. Astylus convexits, sp. n. 



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

 metallic blue, the basal joints of the antennas in great part 

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

 and two broad stripes on the disc (united posteriorly in one 

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

 the prothorax sparsely, somewhat coarsely, and the elytra 

 very coarsely, punctate. Head rather broad; antennae (<£) 

 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. (c? ? •) 



Hah, Peku, Chanchamayo (Thamm). 



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

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

 Not unlike A. pallipes, Kirsch, from Ecuador, but more 

 convex, the antenna? longer and stouter, the prothorax 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 Astylus. The long antennas, &c., 

 separate A. convexus from the Chilean genus Arthrobrachus. 



* In the Fry Collection there is a damaged tf 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, boliviensis or exclama- 

 tionis, Pic, from the same country. 



