( 2.57 ) 



marginal dots, a dot on shoulder and a line in front of subbasal tubercle ; this 

 tubercle liigb, compressed, a similar one in third interspace in middle, with a 

 black spot on top, no other tubercles, but interspace 7 costate before apex, the 

 costa rather abruptly terminating, and 9 subcostate. Pygidium truncate, with the 

 angles rounded, pale ochraceous, shaded with grey. Underside sparsely pubescent 

 white, sides more densely pubescent, within this white vitta some black dots. 

 Logs very pale ochraceous ; basal half of femora (hinderside only of anterior 

 femora), a snbapical spot or ring, apical half of tibiae and a subbasal spot, and 

 tarsi, except base of first and second segments, brown. 



Length, 5 mm. 



Hah. Ega, Amazons. 



1 ?. 



31. Monocloeus rhombifer spec. uov. 



S. In colour resembling M. basalis, but very different in structure. Rostrum 

 white like cheek, twice as broad as long, augulate in middle above antenual 

 cavities, narrowed from this angle to apex, subsinuate in middle of apical 

 margin, transversely subcarinate above on each side in middle. Frons white, 

 about one-fourth the width of the rostrum. Ocei[mt concave anteriorly. Eye 

 large, not so prominent as in basalis, feebly emarginate below. Antenna rufous 

 brown, reaching base of jjrothorax, segments 1 and 2 and apex of 3 to 8 

 rufous, 3 = 4 a little longer than 2, 8 about three times as long as broad, 

 9 one-third longer than broad, 10 also triangular, a little shorter than 9, 11 ovate, 

 broad and somewhat longer than 9. Prothorax in shape similar to that of basalis, 

 transversely depressed before middle, cldthed with a pale ochraceous pubescence ; 

 a band from middle of apical margin obliquely to carina, comjwsed of confluent 

 spots, an elongate basal spot on each side of greyish mesial spot extending from 

 basal edge obliquely across carina to before-mentioned band, which it does not 

 quite reach, a small mesial spot behind middle and some rather indistinct or 

 tiny spots at the sides, black ; carina feebly convex in middle and again laterally. 

 Elytra black, slightly shaded with grey, from basal margin to hinder side of 

 subbasal tubercle ochraceous, this area including some black dots, one of which 

 is situated on the tubercle, shoulder rufous brown, third interspace with black 

 tubercle in middle, fifth with a very small black tubercle before and another in 

 middle, both median ones followed by a white or huffish spot, seventh and ninth 

 interspaces faintly dotted with black, no other tubercles, the elytra being evenly 

 convex from median tubercles to apex, underside grey. Anterior and median legs 

 rufous, two spots on femora and a very large spot on til)ia brown ; hindleg 

 brown, rufous at the joints, similarly pubescent grey as fore- and niidlegs ; midtibia 

 with an obtuse projection at apex. 



Length, o mm. 



I lab. Upper Amazons. 



1 6. 



32. Monocloeus or spec nov. 



cJ?. Similar to -1/". rhomhifrr, but smaller. Eyes fiirther apart, antenna 

 shorter, segments 10 and 11 mucli narrower near base, the club therefore more 

 loose, twice as long as broad in i. Pronotum less depressed before middle, 

 carina straight, black oblique band extending from middle of apical margin 



17 



