NEW BUPRESTID BEETLES — FISHER 351 



Genus TRIGONOGYA Schaeffer 



TRIGONOGYA INSULARIS. new species 



Elongate oval, strongly shining, sparsely pubescent, black, with a 

 distinct purplish tinge, bright blue along base of elytra, and tarsi 

 brownish yellow. 



Head convex, without a median depression ; surface finely, shallowly, 

 sparsely punctate, the intervals finely reticulate; eyes with inner 

 margins nearly parallel to each other. Antenna extending beyond 

 middle of pronotum (broken). 



Pronotum regularly convex, twice as wide as long, distinctly nar- 

 rower at apex than at base, widest at apical fourth; sides broadly, 

 arcuately diverging from apical angles to apical fourths, then feebly, 

 obliquely converging to the posterior angles, which are rectangular ; 

 anterior margin feebly, arcuately emarginate ; base truncate ; surface 

 sparsely, finely, shallowly punctate, the intervals smooth, and sparsely 

 clothed with rather short, semierect, inconspicuous hairs. Scutellum 

 triangular, smooth. 



Elytra strongly convex, as wide as pronotum at base ; sides nearly 

 parallel from humeral angles to behind middles, then arcuately con- 

 verging to the tips, which are conjointly broadly rounded; humeral 

 angles obtusely rounded ; surface deeply, transversely depressed along 

 bases, very finely, sparsely, indistinctly punctate, intervals smooth, 

 sparsely clothed with very short, semierect, inconspicuous hairs. 



Abdomen beneath strongly convex, finely, indistinctly punctate, 

 finely, longitudinally reticulate, sparsely clothed with short, incon- 

 spicuous hairs ; last sternite finely granulose and broadly rounded at 

 apex. Prosternum longitudinally reticulate, with distinct, deep 

 antennal grooves extending to middle of prosternum. Posterior mar- 

 gin of hind coxal plate slightly arcuate. 



Length 2 mm., width 1 mm. 



Type locality. — Port-of-Spain, Trinidad. 



Type and paratype. — U.S.N.M. No. 58801. 



Described from two specimens (one type), collected at the type 

 locality, October 24, 1918, by Harold Morrison. 



This species is allied to Mastogenius uniformis Waterhouse, but it 

 differs from the description given for that species in being black, 

 with a distinct purplish tinge, and in having the bases of the elytra 

 bright blue and the dorsal surface of the body sparsely clothed with 

 short hairs. Waterhouse, in his careful description of uniformis, does 

 not mention any pubescence, and if the type was pubescent it is very 

 doubtful that he had overlooked that character. Mastogenius uni- 

 fomiis Waterhouse has the antennal grooves on the prosternum and 

 should be placed in the genus Trigonogya Schaeffer (new combination) . 



U. S. GOVERNMENT PRINTING OFFICE: 1949 



