198 Dr. Guy A. K. Marshall on 



Gompsus iris, sp. n. 



cj. Integument black, densely clothed throughout with scaling; 

 the upper surface and sides of the rostrum, head and prothorax 

 (except a quadrate green patch in the middle of the base of the last), 

 the apex of the elytra, and a broad stripe approximately between 

 striae 3 and 7 from base to apex of the elytra, metallic golden 

 spangled with coppery and purple scales; the sutural area of the 

 elytra from the base to the top of the declivity dull pale green 

 sj)rinkled with metallic green scales; the sides of the elytra, the 

 whole lower surface, legs and antennae, similarly pale green but with 

 the metallic scales much more numerous. 



Head not very convex, the forehead nearly flat, with a very faint 

 short median stria ; the anterior margin of the eyes deeply impressed. 

 Roslrum much longer than the basal width, parallel- sided in the 

 posterior half and gently widening to the apex; the interantennal 

 space deeply excavated, the dorsum convex, with an oblique furrow 

 on each side. Antennae v/ith the scape only just reaching the 

 hind margin of the eye, rather broad, compressed and gradually 

 clavate; the fimicular joints in order of length : 2, 1, 3, 7, (4, 5), 6, 

 the shortest one about as long as broad. Prothorax a little longer 

 than broad, gently narrowing from base to apex, the sides slightly 

 rounded, and Math a distinct apical constriction; the gular margin 

 gently sinuate; the dorsum with a shallow triangular median 

 impression containing a few coai-sc punctures and a short median 

 stria in the apical half, the lateral areas not impressed and 

 coarsely punctate. Scidellum a little longer than broad, oblong 

 and densely squamose. Elytra elongate, broadest at the' shoulders, 

 which are prominent and nearly rectangular, and gradually narrow- 

 ing behind, the apices jointly rounded; the dorsal outline quite 

 flat to the declivity, which has a straight slope of 60°; the large 

 punctures in regular rows and partly filled with scaling, none of the 

 intervals being costate, the sutural area being flattened as far as 

 stria 3; the scales small, circular and overlapping; the setae very 

 small, recumbent and inconspicuous. Lecjs slender, with recumbent 

 pale setae; the tibiae not denticulate internally, the hind corbels 

 fully squamose ; the second joint of the hind tarsi longer than broad, 

 the claws without a lateral seta. 



Length, 11 mm.; breadth, 4 mm. 



Colombia : MedelUn. 

 Described from a single specimen. 



This beautiful and well-marked species is allied to 

 C. gemmeus Fst. (1892), but apart from the colouring, it 



