32 E. T. CRESSON. ' 



niesothorax, very slightly constricted, unaruieil ; metiithonix rounded above, 

 posterior face declivous; abdomen elongate-ovate, longer than head and thorax ; 

 first segment small, depressed, gradually widened posteriorly and sessile with 

 base of second segment; apical segment flat, longitudinally striated; beneath, 

 the second segment is shining, strongly punctured. 



Velvety-black, the pubescence black and appressed, a few erect hairs ou head 

 and prothorax anteriorly ; head except occiput, a broad stripe on each side of 

 nietatliorax, pleura, an oblique stripe when viewed from above— lunate when 

 viewed from the side — on each side of second segment posteriorly, a line or spot 

 on each side of segments 3-5, and a spot on middle of segments 4 and 5, all of 

 dense, appressed silvery-white pubescence; calcaria pale; legs and apical margin 

 of ventral segments 2-5, clothed with silvery pubescence. 



Cliapada. Coniinon. A beautiful species, closely allied to the 

 two preceding, but the pro- and niesothorax are entirely black above. 



38. M. aiiroplas^a 9 ■ — Length 4-6 nim.^Head transverse, scarcely broader 

 than thorax ; eyes subovate, flatly convex, distinctly netted ; thorax almost 

 square, a little longer than broad, slightly narrowed at lateral middle; nieta- 

 tliorax abruptly truncate behind ; abdomen oblong-ovate, first segment very 

 broad, not at all constricted at tip, sessile with base of second segment and con- 

 forming in outline therewith, apical segment finely longitudinally aciculate. 



Black, opaque; head uniformly clothed with silvery pubescence, as is also 

 scape of antennic; middle of mandibles more or less, and antennte except base 

 and apex, fusco-ferruginous ; thorax above clothed with short black or fuscous 

 pubescence, that on metathorax pale; a stripe on lateral margin of thorax above, 

 connected posteriorly with a band on base of metathorax, of silvery pubescence; 

 legs piceous, clothed with griseous pubescence, trochanters and tarsi more or less 

 fusco-ferruginous; calcaria white; first segment of abdomen and basal sides of 

 second clothed with long silvery-white hair ; a spot of appressed silvery pubes- 

 cence on sides of third segment, covering also the lateral apical margin of second ; 

 a broad stripe of bright golden or coppery -golden pubescence, commencing on 

 apical middle of fii-st segment, slightly dilated postei'iorly and ending on apical 

 middle of third segment; apical segment testaceous or rufo-testaceous, with a 

 golden or coppery reflection, and fringed with long silvery-white pubescence; 

 venter piceous, pale at apex and on apical margin of the segments, clothed rather 

 sparsely with pale pubescence. 



Chapada. A beautiful little species, with a broad, central, briaht 

 golden cupreous, pubescent stripe on abdomen abov'e, extending from 

 first to apex of third segments. Closely related to both empyrea 

 Gerst. and picta Andre. 



39. .M. i*alv»ria ?. — Length 12-13 mm. — Form slender, densely conflu- 

 ently punctured, coarsely so on cheeks, and on sides of thorax and of abdomen ; 

 head broader than thorax, quadrate when viewed in front, transversely so from 

 above; eyes ovate, finely netted; sides of cheeks longitudinally carinate be- 

 neath; thorax long, slender, subcompressed, gradually narrowed behind; abdo- 

 men ovate, strongly gibbous at base of second segment, basal segment depressed, 

 quadrate, slightly dilated posteriorly. 



