ART. 12 MEGACHILID BEES FEOM BOLIVIA COCKEEELL, 5 



punctured; head and thorax above without red hair, very Httle hairy; 

 wings dilute reddish fuliginous, nearly uniform; first two abdominal 

 segments coarsely punctured and entirely black (broad orange bands 

 on segments 3 to 6). The ventral scopa is white. 



Rurrenabaque, Beni, Bolivia, October (W. M. Mann). Described 

 from one female. Allied to D. psaenytJiioides (Holmbeig). 



Type.— Csit. No. 29075, U.S.N.M. 



DIANTHIDIUM MAPIRENSE, new species 



Male. — Length, 5.5 to 6 mm. Black, robust, head and thorax with 

 large punctures, the surface showing between on clypeus and sides of 

 meso thorax; hair of thorax above scanty, whitish; mandibles, tegulae, 

 and entire thorax black; lateral third of lower margin of clypeus (or 

 reduced to spots), narrow stripe up orbits to a little above antennae, a 

 short mark mesad of each antenna, and slender but entire occipital 

 band, light yellow; antennae black; prothorax projecting laterally, so as 

 to appear spiniform seen from above: wings strongly dusky, very dark 

 in the region of the marginal cell; first recurrent nervure not going as 

 far beyond first intercubitus as second beyond second cubital cell; 

 legs entirely black; first two abdominal segments very minutely and 

 densely punctured, entirely black, except a minute dot at extreme 

 sides of second; apex broadly rounded, without teeth; venter banded 

 with white hair. 



Type locality. — Near mouth of Rio Mapiri, Bolivia, September 

 (W. M. Mann). Also obtained by the same collector at Huachi, 

 Beni, Bolivia, September, this specimen having the yellow clypeal 

 band more nearly complete. Described from three males. I had to 

 consider whether this could be the male of D. holmbergi, but it is 

 much smaller, the wings are very different, and both locality and 

 date are different. 



TyjJB and one parafype.—Csit. No. 29076, U.S.N.M. 



Paratype in collection of author. 



DIANTHIDIUM NITIDIPES, new species 



Female. — Length hardly 8 mm. Robust, black, head and thorax 

 strongly and closely punctured; an imperfectly indicated line down 

 the middle of the strongly punctured clypeus; mandibles and tegulae 

 black; small spot at each extreme side of clypeus, narrow stripe along 

 orbits (becoming lines above and ending about halfway up front), 

 curved band mesad of each antenna, and continuous narrow occipital 

 stripe (going nearly to lower end of eyes) all yellow; cheeks very 

 coarsely punctured, keeled behind; antennae dark, third joint red 

 beneath; mesothorax dull, densely punctured, a yellow stripe, not 

 conspicuous, at each side of anterior margin; scutellum and axillae 

 bright orange; area of metathorax longitudinally sulcate in middle, 

 its lower part shining; wings sub hyaline; deeply stained with fuscous 



