32 NEOTROPICAL BEES 



Bertoni and Schrottky, but it is much larger. The ornamenta- 

 tion of the abdomen is like that of the genus FlorUegus. The 

 general appearance of the insect is exacth' like Svastra bombylans 

 Holmberg, but it is easil}' distinguished b}- the dark scape and 

 other characters. 



Melissoptila pulchricornis new species 



Male. Length, about 8 mm., antennae reaching to end of first alDcloniinal 

 segment; black with the knees, tibiae at apex, and all the tarsi ferruginous; 

 clypeus strongly punctured, the lower part pallid or wholly black, labrum pal- 

 lid or black; mandibles with a large yellow basal patch, beyond which is a red 

 patch; maxillary palpi two-jointed, the joints subequal in length, the second 

 broad, but with slender pale base; flagellum bright ferruginous beneath, ex- 

 cept the last three joints and apex of the one before, which are black; eyes 

 green; hair of head and thorax dull white, stronglj' stained with fuscous on 

 scutellum and hind part of mesothorax; mesothorax shining, with scattered 

 punctures; tegidae dark fuscous; wings dusky, nervures rufo-fuscous; second 

 submarginal cell very broad; basal nervure falling short of transversomedian; 

 legs with white hair, ferruginous on inner side of tarsi; abdomen with very 

 broad bands of appressed yellow hair on segments two to five, and a narrow 

 one on first; apical plate very broad. 



Carcarana, Argentina (Bruner 52). The condition with pallid 

 labrum and margin of cl^vpeus may be due to immaturity. One 

 specimen is pinned on the same pin as a Diadasia callura. The 

 insects are ver}' much alike in general appearance, and were 

 evident!}' taken for sexes of one species. M. pulchricornis differs 

 from M. honaerensis Holmberg by the wholty or mainly dark 

 clypeus. By the color of the flagellum it recalls the much larger 

 M. richardiae Bertoni and Schrottky. 



Xenoglossodes lusor new species 



Male. Length, about 10.5 mm., anterior wing, 1.5 mm.; black, robust, 

 covered with long ochraceous hair, fulvous on thorax and abdomen above, that 

 on abdomen erect, except on narrow margins of second and following seg- 

 ments; eyes brown; facial quadrangle broader than long; clypeus, labrum 

 and base of mandibles bright lemon yellow; maxillary palpi five-jointed, second 

 thick but cjdindrical, third long, slender, and cylindrical, fourth very long and 

 slender, fifth slender, measurements in microns: (3.) 176, (4.) 130, (5.) 80; 

 scape black; flagellum very long, bright orange-ferruginous, dusky above; third 

 antenna! joint about as long as apical width; mesothorax shining, the disk 

 almost impunctate; tegulae dark fuscous; wings hj^aline, faintly dusky, 

 nervures fuscous, only two submarginal cells, the second transversocubital 

 nervure missing; tarsi elongated, ferruginous; legs with fulvous hair; venter 

 of abdomen with deep red hair-bands. 



