16 Dr. G. A. K. Marshall on African 



Protostrophus immerens, sp. n. 



? . Black, with dense sandy-grey scalinj;- ; the i)rotliorax 

 "with auiil'delined broad central brown stri[)e, an iiiteiriipted 

 narrow line on each side of it, and a broad lateral stripe on 

 the indexed portion, the dorsal markings being sometimes 

 absent ; the el\ tra often with several rows of very indefinite 

 darker spots, usually in the striae. 



Head separated from the rostrum by a curved stria, which 

 does not nearly reach the margins ; the forehead smooth, 

 the sculpturing entirely hidden by the scaling, and witli a 

 deep central furrow ; the eyes prominent, strongly produced 

 backwards, moderately convex, deej)est about the middle, 

 the hind edge of the orbit not })rojecting. Rostrum trape- 

 zoidal, much shorter than its basal width, rapidly narrowing 

 in front, the sides straight ; the upper surface flat, with 

 only a very inconspicuous scale-covered central carina in 

 the basal half, and the very shallow punctation hidden by 

 the dense scaling ; the genae not impressed. Antennce 

 testaceous brown, with the first joint of the funicle distinctly 

 longer and thicker than the second, which is about twice as 

 long as the third. Prothorax not quite twice as broad as 

 long (5 : H), broadest at the middle, the sides moderately 

 rounded, forming an obtuse granulated lateral edge, very 

 deejdy constricted laterally at the extreme base, and slightly 

 emarginate on each side at the apex for the reception of the 

 eyes ; the basal margin narrowly raised, truncate and not 

 broader than the apical, vi^hich is shallowly sinuate in the 

 middle, the angles before the basal constriction rounded, 

 and the apical ones almost right angles ; the upper surface 

 moderately convex tiansversely, but almost flat longi- 

 tudinally, "with flue confluent shallow punctation (hidden by 

 scaling) and a shallow central stria, which is sometimes 

 feebly indicated when the scaling is intact. Elytra oblong- 

 ovate, almost parallel-sided from near the base to beyond 

 the middle, jointly sinuate at the base and very broadly 

 rounded behind; the striae very shallow, the punctures 

 merely indicated through the scaling and each containing 

 a minute recumbent seta; the intervals broad, slightly con- 

 vex, finely rugose, and each with a row^ of recumbent pale 

 setae ; the scales shghtly smaller than those on the pro- 

 thorax, smooth, subcircular, very dense and closely con- 

 tiguous. Le(js with the front tibiae dilated at the apex and 

 there armed with eight short stout spines, of which the inner- 

 most pair are very small and contiguous, and the outermost 

 spine is more distant from the rest ; the mid-tibiae with four 



