290 HYMENOPTERA. 



with silvery pubescence. Thorax : the mesothorax very closely 

 and finely punctured, the lateral margins covered with fine seri- 

 ceous pile ; the metathorax finely shagreened, the apex abruptly 

 truncate, the truncation covered with silvery pubescence; the 

 wings hyaline, with a faint cloud on their apical margins ; the 

 nervures testaceous, as well as the tegulse behind; the thorax 

 beneath and the legs have a fine silky j)ile. The apical margins 

 of the four basal segments with fasciae of silvery pile, observable 

 in different lights ; the apical segment covered with silvery pubes- 

 cence, the tip ferruginous. 



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



63. Larrada subpetiolata. B.M. 



Female. Length 3 lines. — Black : the face silvery ; the man- 

 dibles pale ferruginous, black at their base. The thorax covered 

 with a fine thin cinereous pile, subopake ; the metathorax deli- 

 cately shagreened, the truncation abrupt and covered with bright 

 silvery pubescence ; the wings fusco-hyaline, their apical margins 

 darkest; the nervures and tegulse rufo-testaceous ; the spines 

 which arm the tibiae and tarsi, not the calcaria, short, sparing, 

 and pale testaceous. The abdomen subpetiolate, the apical 

 margins of the segments with fasciae of silvery pile, observable in 

 different lights. 



Hab. Brazil (Villa Nova). (Coll. H. W. Bates.) 



54. Larrada trifasciata. B.M. 



Female. Length 4^ lines. — Black : the face, cheeks, and base of 

 the mandibles covered with fine silvery sericeous pile. The meso- 

 thorax very delicately ])unctured, the punctures confluent ; the 

 metathorax opake, the sides and apex with a fine cinereous pile ; 

 the truncation abrupt, with the margin at its verge slightly raised ; 

 the sides of the truncation, and also of the disk, transversely 

 striated ; the wings subhyaline, their ajncal margins with a fus- 

 cous border ; the nervures black. The thorax beneath and the 

 legs covered with a fine changeable cinereous pile. Abdomen 

 sericeous, with fasciae of silvery pile on the apical margins of the 

 three basal segments ; the apical segment covered with silvery 

 pubescence. 



Hab. St. Domingo. 



55. Larrada truncata. 



Female. Length 5 lines. — Black : the face, mandibles, and 

 head behind the eyes covered with golden pubescence ; the ante- 

 rior margin of the clypeus truncated, the angles of the truncation 



