i4 HYMENOPTERA. 



arcuate, with a dentation on the exterior towards the base. 

 Thorax oval, the collar transverse ; the metathorax of about 

 equal length to the mesothorax, truncated posteriorly ; the su- 

 perior wings with one marginal cell appendiculated and truncated 

 at its apex; three submarginal cells, the first longer than the 

 two following ; the second triangular, with the angles truncated ; 

 the third oblique, oblong, of equal width ; the legs moderately 

 long, spinose. Abdomen ovato-conical, acute at the apex. 



This genus closely resembles Larrada, but differs principally 

 in the neuration of the wings and in having three distinct ocelli. 



1. MORPHOTA FASCIATA. B.M. 



Female. Length 3 lines. Head and thorax black ; the cly- 

 peus covered with silvery pubescence ; the vertex smooth ; an 

 impressed line runs from the anterior ocellus to the insertion of 

 the antennae ; the mandibles and scape in front rufo-piceous ; 

 the thorax and legs with a fine thin glittering silky pile; the 

 anterior wings have a transverse fascia crossing the second and 

 third submarginal cells, the extreme apex slightly clouded; me- 

 tathorax opake, very finely shagreened ; the sciitellum smooth 

 and shining. Abdomen r the two basal segments and the base 

 of the third segment ferruginous, the apical segments black; the 

 apical margins of the second and third segments covered with 

 silvery pile. 



Hab. Brazil (Santarem). (Coll. H. W. Bates.) 



2. MORPHOTA CONCINNA. B.M. 



Female. Length 3-3^ lines. Head and thorax black and 

 shining ; the head covered with a delicate silky pile, the clypeus 

 with bright silvery pubescence ; the mandibles ferruginous. The 

 metathorax flattened above and longitudinally striated, the stria 

 slightly waved ; the truncation highly polished, with a deep fos- 

 sulet in the middle above, the sides with a few transverse coarse 

 striae ; wings hyaline, beautifully iridescent, with a faint trans- 

 verse fascia crossing the second and third submarginal cells, the 

 nervures rufo-testaceous. Abdomen : the three basal segments 

 ferruginous, the three apical black ; the apical margins of the 

 second and third segments covered with silvery pile. 



Hab. Brazil (Tapajos). 



3. MORPHOTA HARPACTOIDES. B.M. 



Female. Length 5 lines. Black : the face and cheeks densely 

 covered with silvery pubescence, the head having a fine short 

 downy pile. Thorax and legs covered with silvery pile, very 



