96 MeiMOirs on the Coleoptera 



arcuate and not quite so long, strongly, closely sculptured in both sexes; 

 eyes separated by evidently less than the rostral width in both, the head 

 closely punctate; prothorax a third wider than long, formed nearly as in 

 the preceding, the apex broader, more than half as wide as the base, the 

 lobe small, with the sinus much more minute and shallower; punctures 

 very coarse and close, with a smooth median streak centrally; scutellum 

 scarcely as wide as long, more swollen and more deeply concave posteriorly 

 than in the preceding; elytra a third longer than wide, a fourth wider than 

 the prothorax and fully twice as long, the feebly oblique sides only slightly 

 arcuate, the tumid humeri not laterally prominent; grooves deep; uniseriate 

 intervals barely visibly wider than the grooves. Length 2.65-3.35 mm.; 

 width 1.2-1.4 mm. Brazil (Chapada — campo and forest). May and 

 November. Eight specimens cribrata n. sp. 



The pronotal punctures in the genus are much coarser than in 

 the succeeding genus, and are feebly ocellate; the elytral grooves 

 are also coarser and with narrower intervals. 



Iotomia n. gen. 



The more numerous species of this genus bear a very striking 

 external resemblance to Tsianina, being almost identical in outline, 

 except that the sides of the prothorax are more rounded or sub- 

 inflated, and that the sparse white hair-like squamules of the elytra 

 always form a loose transverse post-median fascia. The beak is 

 still shorter and much more slender, and the antennae are distinctly 

 different as stated in the table. As in the preceding genus, I can 

 discover no abdominal sexual characters, and those relating to the 

 head and beak are but slight. The three species at hand are the 

 following: 



Body notably broad, oblong, subparallel, somewhat shining and deep black 

 throughout; pronotum with a few slender hair-like white squamules laterally 

 and subbasally, the elytra with very small dark brown, and larger sparse 

 slender white, squamules, the latter distinct on all the strial intervals basally 

 and in single series for a short distance post-medially; under surface with 

 distinct and sparse narrow white squamules throughout; beak slender, 

 moderately arcuate, subcylindric, distinctly sculptured and loosely basally 

 squamulose in both sexes, distinctly shorter than the prothorax, only very 

 little shorter in the male; antennae slender, medial; eyes separated by the 

 rostral width in both sexes; head throughout closely and strongly punctured; 

 prothorax fully a third wider than long, the sides strongly rounded and 

 rapidly converging anteriad, becoming very feebly arcuate and perhaps just 

 visibly converging toward base, the truncate apex four-sevenths as wide as 

 the base; basal lobe small, evenly, strongly rounded; punctures coarse and 

 deep, separated by less than half their diameters, with a smooth median 

 line in about basal half; scutellum small, oblong, impressed; elytra a fourth 

 longer than wide, with feebly converging sides and broadly obtuse apex, 

 barely wider than the prothorax and four-fifths longer, the humeri small, 

 rapidly rounding; intervals about one-half wider than the grooves, which 

 are moderately coarse, deep and abrupt, the single interstitial series composed 

 of distinct close punctures; abdomen very finely punctate. Length 4.2-4.6 



