HENRY J. FRANKLIN. 345 



hair admixed; sides of head entirely dark brown or black. Labrum 

 with tubercle-like areas well separated and flat or slightly concaved on 

 their summits, the space between them being deeply excavated ; shelf- 

 like projection only moderately wide and prominent ; translucent 

 areas variable, sometimes visible to the naked eye and sometimes 

 absent. Malar space about as long as its width at apex, about one- 

 fourth as long as the eye ; clypeus rather sparsely but coarsely punc- 

 tate ; flagellum of antennae about twice as long as scape ; third an- 

 tennal segment longer than fifth, the fifth longer than the fourth. 



Thorax. — Dorsum covered with yellow pile ; center of disk naked, 

 smooth and shining, but the naked spot usually nearly covered up by 

 the pile bending over it on all sides ; mesopleura bearing yellow pile 

 for some distance below the bases of the wings, but the lower half 

 always entirely dark ; metapleura and sides of median segment usually 

 entirely or mostly dark, but often with light pile only. 



Abdomen. — Dorsum : segment one usually entirely yellow but often 

 with a little black pile on the anterior face at the corners (just over 

 the apparent anterior margin); segment two usually entirely yellow, 

 but often with only the middle yellow and the sides more or less black ; 

 segments three, four and five usually entirely black, but the apical 

 margin of the fifth occasionally with a fringe of light hair ; apical 

 segment mostly black, but the sides with light yellowish ferruginous 

 hair. Venter usually entirely dark, but the apical segment and apical 

 margin of the fifth segment often with more or less ferruginous pile. 

 Hypopygium without a median carina. 



Wings. — Only moderately stained with brown ; the fore pair darkest 

 in the median, anterior portion of submedian, basal portion of second 

 discoidal and anterior portion of the radial cells and in the region 

 beyond the veins. 



Legs. — Black and corbicular fringes black ; very rarely with some 

 light pile on trochanters. 



Worker. — Like the queen, except in size ; wings somewhat lighter 

 in color. 



Male. Head. — Triangular in outline as seen from in front; face 

 well covered with mixed black and yellow pile, sometimes the black 

 but usually the yellow being predominant and very nearly reaching 

 the inner margin of the eye on each side ; occiput well covered with 

 usually pure yellow pile ; ventro-lateral portions of head bearing a large 

 amount of light pile, this connecting with the yellow on the occiput. 

 Malar space longer than its width at apex, about one-quarter as long 

 as the eye. Clypeus usually pretty well covered up with pile, some- 

 times the middle of the anterior portion more or less naked. Flagel- 

 lum (fig. 21) of antennas about three times as long as scape ; third 

 and fifth antennal segments subequal in length, the fourth shorter 

 than either. 



TRANS. AM. ENT. SOC, XXXVIII. (44) 



