AKT. 12 MEGACHILID BEES FEOM BOLIVIA COCKERELL 7 



siderably larger (8 mm.), with different markings on mesothorax, and 

 first abdominal segment without yellow spots. 



Type.—Csit. No. 29078, U.S.N.M. 



Paratype in collection of author. 



DIANTHIDIIIM UNDECIMALE, new species 



Female. — Length, about 7 mm. Robust, black, with yellow mark- 

 ings; blade of maxilla entirely pale ferruginous; eyes pale lilac-gray; 

 clypeus very strongly and densely punctured, a very small smooth 

 space in middle of upper margin; supraclypeal area with a smooth 

 round median space; front very densely punctured, vertex shining 

 between the punctures, a small smooth space next to each lateral 

 ocellus; cheeks shining, rather sparsely punctured, sharply bounded 

 behind; cheeks much narrower than in D. manni; face black, except 

 narrow stripes along the whole length of inner orbits, a little wider 

 above than below; a conspicuous pair of stripes, like a figure 11, 

 between antennae; antennae black, with scape in front and third 

 joint beneath dull red; mesothorax with yellow stripes along lateral 

 third of anterior miargin, but not on lateral margins; axillae and 

 scutellum (the latter sulcate in middle) orange; mesothorax dull and 

 excessively densely punctured, with extremely short brown hair, giv- 

 ing a velvety appearance; base of metathorax with a biareuate groove, 

 crossed by ridges; mesopleura very strongly punctured, the intervals 

 shining; wings dusky gray, darker above basal nervure and in costal 

 region; first recurrent ending more distant from first intercubitus 

 than second from second intercubitus; legs black, tarsi Vv'ith much 

 pale hair; first two abdominal segments shining, finely and closely 

 punctured (but not so finely and closely as in D. manni), hind mar- 

 gin of first rather broadly dull reddish, second with a yellow linear 

 mark at each extreme side; segments 3 to 6 with broad lemon-yellow 

 bands; ventral scopa white. 



Near mouth of Rio Mapiri, Bolivia, September (W. M. Mann). 

 Described from one female. 



Type.— Cat. No. 29079, U.S.N.M. 



DIANTHIOIUM CHRYSURUM, new species 



3Iale (type). — Length, about 7 mm. Robust, black, with yellow 

 markings; head and thorax above with abundant rather long rufous 

 hair; spot on mandibles, very broad band on lower part of clypeus 

 (its upper margin irregular, with a sharp median upward projection), 

 short lines mesad of antennae, lateral face marks (broad below, 

 linear above, ending some distance below top of eye), occipital band 

 (narrowly broken in middle and not extending down cheeks) , line at 

 each side of anterior border of mesothorax, lower half of axillae and 



