248 Mr. J. S. Baly's Descriptions of 



half the body, five terminal joints deep metallic-blue. Thorax 

 considerably longer than broad, nearly resembling, in that respect, 

 S. lonfricolUs, Lac, sub-cylindrical, apical margin very slightly 

 produced, anterior angles obsoletely prominent; upper surface im- 

 punctate, impressed at the base with a shallow but distinct longi- 

 tudinal fovea. Scutellum impressed vvith a broad longitudinal 

 fovea. Elytra oblong -elongate, sides sub -parallel, narrowed 

 towards the apex ; above sub-nitidous, moderately impressed 

 within the shoulders, the latter slightly prominent ; surface finely 

 punctate-striate, the striae aequidistant, slightly approximating 

 in pairs at the base, interspaces finely vermiculate ; in the female 

 the surface of the outer disc is very feebly concave below the 

 shoulders. Body beneath shining, tarsi obscure purple, vvith 

 occasionally a rufous reflexion. 



Male. — Posterior thighs slightly exceeding the elytra in length, 

 strongly incrassate ; lower edge armed before the apex with a very 

 short obtuse tooth, and immediately behind the middle with a short 

 ridge, the posterior extremity of which is produced into a long 

 stout tooth, inner surface furnished near the base with a small 

 patch of fulvous hairs; tibiae of the same pair compressed, strongly 

 curved at the base, gradually thickened from immediately before 

 the middle nearly to the apex, the latter mucronate; anterior sur- 

 face deeply channelled, its outer edge furnished vvith a broad ridge, 

 which, commencing just before the middle, gradually increases in 

 width until just before reaching the apex of the tibia, terminating 

 in a broad flattened tooth ; the inner edge is furnished immediately 

 before its apex with a short emarginate ridge ; basal segment of 

 abdomen longitudinally excavated, irregularly but somewhat closely 

 punctured, its surface very sparingly covered with short fulvous 

 hairs, which are only visible when viewed obliquely. 



Female. — Posterior pair of thiglis not extending beyond the 

 apex of the elytra, the lower edge denticulate, and produced near 

 its apex into a short denticulate ridge. 



Hab. west coast of Africa. 



Collections of the British Museum, Major Parry, and my own. 



This beautiful species is remarkable for the peculiar form of 

 the hinder tibiee ; it is closely allied to S. amelhijstina, Lac, but 

 differs in having a tomentose patch at the inner base of the poste- 

 rior femora ; S. Lacordairei, Thoms, appears to come very near 

 to the present insect, but according to the short description of the 

 author, the dentation of the thighs, and also the form of the tibiae, 

 differ from the present insect. 



