28 E. T. CKESSOX. 



broad behind and sessile with base of second segment; pygidium alutaceous at 

 base, smooth at tip. 



Black ; cheeks, space on front between eyes and scape of antennae thinly 

 clothed with pale glittering pubescence; an oblique silvery pubescent stripe be- 

 hind eyes; on each side of metathorax above a silvery pubescent stripe extend- 

 ing forward nearly or quite to middle of mesothorax ; lower margin of flanks of 

 thorax with patches of dense silvery pubescence ; legs black, clothed with pale 

 pubescence, long and thin on femora; on outer sides of four posterior tibiae 

 the pubescence is more or less black, the calcaria black or fuscous; abdomen 

 clothed above with appressed black pubescence; first segment with a silvery 

 patch on each side of disk above ; on each side of second segment at base a short, 

 suboblique silvery stripe, between which and the lateral margin the surface is 

 smooth and polished ; on basal middle of this segment a pyriform or subtriangu- 

 lar spot of pale golden or orange-golden pubescence, the narrower part reaching 

 the base of the segment; two rather broad silvery stripes on apical half of the 

 abdomen above, beginning at apex of second segment ; venter with sparse, pale 

 hairs, the apical margin of the segments fringed with pale pubescence. 



Chapada. Common. Allied to the three preceding species, and 

 also to armata King, but very ditferent in many ways. 



It gives me much pleasure to dedicate this handsome species to 

 my friend Herbert H. Smith, the indefatigable collector in Natural 

 History, and by whose discoveries so many new and beautiful spe- 

 cies have been added to our knowledge of the South American 

 fauna. 



30. Dl. armata King (Xova Acta Caes. Cur., x, p. 323. pi. xsiii, fig. 12).— ? — 

 Length 18 mm.— Head very large, transversely subquadrate, twice broader than 

 thorax, prolonged behind eyes, lateral posterior margin acutely carinate, and 

 when viewed from above the lateral angles appear acutely spinose; beneath, the 

 cheeks have on each side a long, divergent, acute tooth, behind which is a small 

 acute tooth ; clypeus with a long, median, obtuse, porrect, slightly recurved tooth, 

 above which are two short obtuse tubercles ; eyes small, ovate, depressed, very 

 wide part, the front being unusually broad ; mandibles long, acute at tip; thorax 

 narrow, subcompressed, the lateral tubercles at posterior margin of prothorax 

 prominent; metathorax abruptly declivous behind, the lateral margin not ser- 

 rate, flanks smooth, impunctate; legs slender, tibiae and tarsi strongly spinose ; 

 abdomen ovate, basal segment subpetiolate gradually dilated posteriorly, the an- 

 terior face flat and obliquely declivous, the apex transversely narrowed, hand- 

 like, with a row of short suberect teeth on anterior margin ; pygidium finely 

 alutaceous; ventral segments strongly not densely punctured. 



Velvety black, with long, scattered, black hair; a subtriangular spot behind 

 each eye, a long U-shaped mark on thorax above, lower portion of pleura, a baud 

 on apex of first segment of abdomen, a narrow, elongate mark on middle of sec- 

 ond segment and a spot on each extreme side near base, also narrow apical mar- 

 gin of this segment, broadly interrupted on disk, and a wedge-shaped mark on 

 each side of third segment, pointed to disk, all of pale golden or silvery pubes- 

 cence; base of antenme, legs, apex of abdomen and venter more or less clothed 



