368 Memoirs on the Coleoptera 



Fastidiosa differs from electa in its much smaller size and narrower 

 outline, very different scutellum and markedly alternating width of 

 the strial intervals. 



Antesis n. gen. 



The rhombic form of the body in this and the preceding genus, 

 would qualify them as typical members of the Centrinini, were it 

 not for the exposed pygidium. The sculpture is rather coarse and 

 dense, the upper surface in great part glabrous, the elytra with or 

 without widely isolated scales, and the under surface is squamose 

 throughout. The beak is rather long, slender, evenly and moder- 

 ately arcuate, feebly tumid above at the extreme base and sepa- 

 rated from the head by a deep constriction, the antennae 

 medial (o 71 ) or very slightly post-medial (9), slender, the first 

 funicular joint longer than the next two, the second also elongate 

 and about equal to the succeeding two, the club small, oval and 

 abrupt. The presternum is densely squamose, scarcely at all 

 constricted, very feebly impressed along the middle and very 

 narrowly separates the coxae, the posterior lobe not very wide, 

 sinuate medially at tip, not quite attaining the anterior line of the 

 middle coxae and not forming quite so uniform a surface with the 

 mesosternum as in the preceding. The prothorax is not tubulate 

 at apex, the basal lobe small, short and rounded, the scutellum 

 well developed, quadrate, free and densely squamose, the elytra 

 with coarse deep abrupt and punctured grooves, and the pygidium 

 densely punctured, small, subvertical, semicircular and with the 

 base covered in the female. The legs are slender, the femora mutic. 

 The two species known thus far are as follows: 



Body small, rhombic, deep black throughout, the fine interstices between the 

 dense punctures shining; squamules above very few on the pronotum, but 

 close in a short median line before the centre and larger and dense in a 

 conspicuous median spot at base and also on the scutellum, the strial intervals 

 with single series of small slender brown squamules, the general elytral 

 surface with some remotely scattered and very large, white scales, the latter 

 dense throughout the under surface, finer and separated on the legs; beak 

 (cf) feebly arcuate, rather slender, punctured, smoother distally and more 

 than half as long as the body, or ( 9 ) still longer, more slender and smooth, 

 densely punctured but only slightly thickened basally and nearly two-thirds 

 as long as the body; antennae piceous, medial (o 71 ) or slightly post-median 

 (9); prothorax a third wider than long, the sides slightly converging and 

 barely arcuate, gradually a little more arcuate and oblique in about apical 

 two-fifths to the apex, which is about half as wide as the base; punctures 

 rather coarse, deep and very dense throughout, with a very narrow smooth 

 median line; elytra elliptic, a fourth longer than wide, fully a fourth wider 

 than the prothorax and twice as long ( 9 ), a little less (o 71 ); grooves coarse, 

 as wide as the intervals, which have single series of coarse and slightly sepa- 

 rated punctures; male with an extremely feeble medio-basal abdominal 

 impression, which is scarcely less densely squamose. Length 2.5-2.85 mm.; 



