1897.] NATURAL SCIENCES OF PHILADELPHIA. 233 



thorax; pronotum rather shorter, evenly rounded antero-laterally, 

 posteriorly subangulate ; middle segment entire, the upper and pos- 

 terior surfaces scarcely separated, postero-lateral angles rounded, 

 the posterior portion slightly depressed, indistinctly striated trans- 

 versely, stigmal furrow represented by a pit over the hind coxae ; 

 legs feebly spinose, longer spur of hind tibiae about two-thirds as 

 long as first hind tarsal joint ; wings subhyaline, darker apically, 

 including most of marginal, apex of second submarginal and third 

 entirely, first recurrent vein received by second submarginal before 

 middle, cubital vein of hind wings interstitial with apex of sub- 

 median cell ; abdomen as long as head and thorax, scarcely com- 

 pressed. Length 14-15 mm. 

 Santarem. Two specimens. 



Notocyphus obscuripennis n.sp. 



9 . — Black ; palpi yellowish ; second dorsal abdominal segment 

 with a transverse reddish-yellow fascia, which is almost interrupted 

 medially; head -and thorax with grayish-sericeous pile, densest on 

 clypeus; clypeus somewhat more than twice broader than long, its 

 fore margin very slightly incurved ; labrum a little longer than 

 broad at base, emarginate, with the clypeus finely though distinctly 

 punctured ; front finely punctured, impressed line faint : eyes well 

 separated from base of mandibles, separated at the top by a distance 

 greater than the length of the first joint of flagellum ; distance be- 

 tween hind ocelli greater than that between them and nearest eye- 

 margin ; antennas (last seven joints missing) ; pronotum subangular 

 posteriorly ; middle segment entire, posterior portion depressed 

 slightly, postero-lateral angles rounded, not prominent, stigmal fur- 

 row shallow ; legs feebly spinose, the longer spur of hind tibiae nearly 

 two-thirds as long as the first hind tarsal joint ; wings fuscous, with a 

 reddish-purple iridescence, recurrent vein received by second sub- 

 marginal cell before the middle, cubital vein of hind wings intersti- 

 tial with apex of submedian cell ; abdomen barely as long as head and 

 thorax, but little compressed. Length 12 mm. 



Chapada (January). One specimen. The red band of abdomen 

 gives the insect a superficial resemblance to Pompilus margin- 

 atus Say. 



Notocyphus crassicornis Smith. 



$ . — Black ; including basal half of mandibles ; clypeus, labrum, 

 face, inner and posterior orbits broadly, scape and pedicellum be- 



