HYMENOPTERA. 289 



the apical segment covered with silvery pubescence, with a smooth 

 shining naked space at the base. 



The male agrees with the female in general colouring, but is 

 smaller. 



Hab. St. Domingo. 



49. Larrada laterisetosa. B.M. 

 Larra laterisetosa, Spin. Mem. Accad. Torino, xiii. 58. 41 (1853). 

 Hab. Brazil (Para). 



50. Larrada luctuosa. B.M. 



Female. Length 7-8 lines. — Black: the face, scape in front, 

 cheeks and mandibles, covered with fine silvery silky pubescence ; 

 the anterior margin of the clypeus emarginate in the middle. 

 Thorax : the mesothorax and scutellum closely and finely punc- 

 tured ; the metathorax delicately transversely striated, the sides 

 obliquely so ; the truncation coarsely rugose, the striation run- 

 ning in a circular direction ; the margin of the truncation slightly 

 rounded, not sharp or abrupt; the wings smoky-hyaline, the 

 nervures black, the tegulse shining ; the legs have a fine cinereous 

 pile; the tibiae and tarsi strongly spinose. Abdomen sericeous, 

 the margins of the segments with bright silvery fascise. 



Hab. St. Domingo ; Brazil. 



5L Larrada nitidiuscula. B.M. 



Female. Lene-th 3 lines. — Black : the face covered with silverv 

 pubescence, having a smooth space in the middle, extending 

 from the anterior ocellus to the insertion of the antennffi ; the 

 mandibles pale rufo-testaceous, their apex rufo-piceous. The 

 mesothorax and scutellum shining ; the metathorax finely rough- 

 ened, but shining ; a faintly impressed longitudinal line in the 

 middle, terminating in a deep fovea at the verge of the trunca- 

 tion ; the latter shining, with a triangular fovea close to the 

 upper margin in the middle ; the sides of the metathorax with a 

 little silvery pubescence ; the thorax shining beneath ; the tibiae 

 and tarsi pale rufo-testaceous ; wings hyaline and iridescent, the 

 nervures, extreme base of the wings, and the tegulae, pale testa- 

 ceous. Abdomen smooth and shining, with a fine silky pile, 

 the apical margins of the segments narrowly pale testaceous. 



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



52. Larrada quadrifasciata. B.M. 



Female. Length 4 lines. — Black : the face densely covered 



