16 Dr. G. A. K. Marshall on African 
Protostrophus immerens, sp. 0. 
9. Black, with dense sandy-grey scaling ; the prothorax 
with an ill-defined broad ceutral brown stripe, an interrupted 
narrow line on each side of it, and a broad lateral stripe on 
the inflexed portion, the dorsal markings being sometimes 
absent; the elytra often with several rows of very indefinite 
darker spots, usually in the striz. 
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 with a 
deep central furrow; the eyes prominent, strongly produced 
backwards, moderately convex, deepest about the middle, © 
the hind edge of the orbit not projecting. 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 gene not impressed. Antenne 
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 (5:3), broadest at the middle, the sides moderately 
rounded, forming an obtuse granulated lateral edge, very 
deeply 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, which 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 transversely, but almost flat longi- 
tudinally, with fine confluent shallow punctation (hidden by 
scaling) and a shallow central stria, which is sometimes 
feebly indicated when the scaling is intact. lytra oblong- 
ovate, almost parallel-sided from near the base to beyond 
the middle, jointly sinuate at the base and very broadly 
rounded behind; the striz 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 
setee ; the scales slightly smaller than those on the pro- 
thorax, smooth, subcireular, very dense and closely con- 
tiguous. Legs with the front tibize 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-tibiz with four 
