406 Mr. F. Smith on new Siiecies 



Megalomnia politum. 



Female. Length 6 lines. Smooth and shining ; head and 

 thorax black ; legs yellow ; abdomen obscure ferruginous. 

 Head : the base of the mandibles yellow, the clyjieus 

 obscurely so, as is also the front of the scape ; the flagellum 

 fulvous beneath. The sides of the meso- and metathorax 

 with ferruginous stripes ; two abbreviated lines on the disk 

 of the mesothorax above ferruginous ; the enclosed space at the 

 base of the metathorax with a deep longitudinal central im- 

 pressed line that runs on to the apex of the metathorax ; legs 

 yellow, with ferruginous stripes on the tibise and femora within ; 

 the wings hyaline and iridescent, the anterior pair yellow along 

 the frontal margin. Abdomen black towards its apex ; the 

 apical segment ferruginous, smooth, shining, and carinate 

 at the sides; the second and two following segments with 

 narrow yellow fasciae on their apical margins ; beneath, 

 the fascias are much broader, and border the fifth segment 

 also. 



Hah. Brazil. 



This species is described from an old specimen. The colour- 

 ing of a recent example would no doubt be much brighter ; the 

 ferruginous markings would probably be yellow on the head 

 and thorax. 



Megalomnia elegans. 



Female. Length 6 lines. Yellow, with black markings ; 

 abdomen fusco-feiTUginous beyond the base of the second seg- 

 ment. Head : the mandibles, labmm, clypeus, and scape of 

 the antennas yellow ; the flagellum ferruginous, more or less 

 fuscous above, and palest at the base ; the head in front and 

 behind ferruginous, and yellowish towards the mandibles ; the 

 latter rufo-piceous at their apex. Thorax : three black longi- 

 tudinal stripes on the mesothorax ; the sutures of the triangular 

 space at the base of the metathorax black ; wings flavo-hyaline 

 and iridescent, the nervures ferruginous ; legs yellow, with 

 more or less ferruginous stains. Abdomen : the base of the 

 petiole yellow, its apex ferruginous ; the base of the second 

 segment and its lateral margins yellow, the rest of the segment 

 and the base of the third ferruginous — beyond, becoming 

 gradually darker to the apex; beneath, the three basal segments 

 are yellow. 



Var. ? Abdomen ferruginous ; the base of the first and se- 

 cond segments and the apical margins of the following segments 

 yellow ; beneath yellow. 



Hob. Brazil. 



