30 E. T. CRESSON. 



at tip, which is sessile with base of second segment and conforming in outline 

 therewith ; pygidium sparsely punctured, shining; beneath, the first segment has 

 a large prominent compressed tooth, second segment shining, sparsely punctured. 



Velvety black above; cheeks, face and scape of antennae clothed with silvery 

 pubescence; two broad, oblique, golden stripes on vertex; mandibles generally, 

 and occasionally the frontal tubercles, rufo-ferruginous ; lateral margin of thorax 

 above, broader on metathorax, silvery or pale golden ; flanks of thorax with short 

 pale sericeous pubescence: legs black, with pale glittering pubescence; caU-aria 

 white; a spot on apical middle of first abdominal segment, often extending a 

 short distance on the second, a stripe on middle of apical half of second segment, 

 extending to apical segment, and an oblique spot on each side of second segment 

 posteriorly, all of silvery or pale golden pubescence, those on disk of first and 

 apex of second segments generally darker in color than the rest; lateral margin 

 of all the segments, and the apical segment, with longer silvery-white pubes- 

 cence ; venter sometimes pale piceous, thinly clothed with pale pubescence, more 

 dense on apical margin of the segments. 



Var. a. — Head and thorax above entirely black, except lateral margin of meta- 

 thorax above, which is sometimes silvery. 



Var. b. — Head above entirely golden. 



Chapacla. Coniiuon. 



33. M. gisante» Perty (Del. An. Art., p. 138, pi. 27, fig. 9).— 9 .—Length 

 18-20 mm. — Large, black ; head quadrate, not broader than thorax, rounded pos- 

 teriorly, prolonged behind eyes, which are small, convex, polished ; vertex with 

 two broad silvery-white pubescent stripes over the eyes; thorax narrowed an- 

 teriorly, sides tuberculate or spinose, those at base of me.sothorax prominent, ob- 

 tuse, smooth and polished ; spiracles at base of metathorax prominent, two 

 silvery-white pubescent stripes on metathorax, ending anteriorly in a spot on 

 each side of niesothorax at base ; lower portion of flanks densely silvery pubes- 

 cent; abdomen oblong-ovate, first segment broad at apex, anterior face flat, apex 

 depressed band-like, with a subapical row of short teeth ; sides of first segment, 

 a double line on each extreme side of second, two short, slightly oblique, longi- 

 tudinal lines on middle above, and sides of remaining segments, silvery white or 

 pale ochraceous pubescent ; legs more or less clothed with pale glittering pubes- 

 cence, the apical porrect spine of posterior tibise thickened at base and suddenly 

 narrowed toward apex into a slender acute spine; calcaria pale. 



Chapada; Corumbu. Rather common. A large conspicuous 

 species. 



34. M. cerbera Klug (Nova Acta Cais. Nat. Cur., x, p. 312, pi. xxii, fig. 9). 

 — 9- — Length 15-18 mm. — Eather slender, black; head small, transverse, not 

 prolonged behind eyes, front long; eyes round, convex, polished ; thorax slightly 

 narrowed anteriorly, sides tuberculate, those at sides of niesothorax at base large, 

 prominent, obtuse, those at anterior angles small, polished ; metathorax rounded 

 above and abruptly declivous posteriorly ; legs slender, more or less clothed with 

 white pubescence, the apical spine of posterior tibiie slender throughout, calcaria 

 black ; head almost entirely, a small spot on disk of prothorax, a stripe on sides of 

 metathorax, ending at base in a spot at spiracles, between which is a small cru- 



