HYMENOPTERA. 303 



pubescence; the anterior margin of the clypeus rounded; the 

 tips of the mandibles rufo-piceous. The wings hyahne, the 

 nervures rufo-fuscous, the marginal cell truncate at the apex ; 

 the hinder margin of the tegulae pale testaceous ; the legs have 

 a changeable silvery pubescence. The abdomen with a brilliant 

 silvery pile, most dense on the apical margins of the segments. 



Hub. New Zealand. 



Species of South America. 

 Sect. 1. Abdomen red and black. 



28. Tachytes bicolor. B.M. 

 Larra bicolor, Fabr. Syst. Pies. 221. 12. 



Hab. Brazil (Para; Villa Nova). 



29. Tachytes Amazonum. B.M. 



Female. Length 6 lines. — Head and thorax black ; the face 

 clothed with pale golden pubescence ; the mandibles pale nifo- 

 testaceous at the base; the cheeks with a thin golden pubes- 

 cence. Thorax : the lateral and posterior margins of the meso- 

 thorax covered with bright golden pubescence ; on the disk it is 

 sparing, short and fulvous ; the post-scutellum and sides of the 

 metathorax with a dense golden pubescence ; the sides beneath 

 the wings, the breast, the coxae and legs with a changeable golden 

 lustre, very bright on the posterior tibiae outside ; the knees, 

 tips of the joints of the tarsi, the anterior paii* entirely, and the 

 claw-joints ferruginous ; the basal joint of the anterior tarsi more 

 or less fuscous above ; wings hyaline, the nervures ferruginous, 

 the tegulae pale rufo-testaceous. Abdomen ferruginous, having, 

 when viewed longitudinally, a golden band on the margin of each 

 segment, but when viewed sideways, the margins appear naked 

 and the intervening parts covered with golden pile ; the apical 

 segment carinated at the sides and clothed with golden pubes- 

 cence ; in some examples the third, fourth, and sometimes the 

 fifth segment have a transverse black stripe. 



Male. — This sex resembles the female, but is smaller, and has 

 the legs entirely of an obscure red ; the abdomen fuscous, with 

 the apical margins of the segments ferruginous ; covered with 

 golden pile, and exhibiting the same difiFerences as the other 

 sex. 



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



