HYMENOPTERA. 805 



and silvery ; tips of the mandibles rufo-piceous, the apical joints 

 of the palpi pale rufo-testaceous. Thorax opake, the scutellum 

 shining and punctured ; wings subhyaline, the fore-wings tinged 

 with yellow, their anterior margins fuscous, the nervures ferru- 

 ginous ; the calcaria, the spines which arm the tibiae and tarsi, 

 and the claw-joint of the latter, rufo-testaceous ; the legs have a 

 thin pale pubescence, most dense on the anterior femora ; they 

 have also in parts a pale golden lustre, most bright on the pos- 

 terior tibiae outside. Abdomen subovate, fuscous - black, the 

 apical margins of the segments rufo-piceous and covered with 

 fine golden pile, the apical segment with bright golden pubes- 

 cence, beneath smooth and shining ; the margins of the segments 

 rufo-piceous. 



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



36. TaCHYTES BELLA. 



Tachytes bella, St. Farg. Hym. iii. 248. 10. 

 Hab. Brazil. 



37. Tachytes jucundus. B.M. 



Female. Length 8 lines. — Black : the face and cheeks clothed 

 with golden pubescence ; the clypeus with large shallow punc- 

 tures on each side, the anterior margin with a minute notch in 

 the middle ; the mandibles yellow towards their apex, the tips 

 black, the palpi pale testaceous. Thorax : the margins of the 

 mesothorax covered with bright golden pubescence ; the sides of 

 the thorax and the metathorax have a changeable bright golden 

 pubescence ; the disk of the thorax and the scutellum closely and 

 finely punctured, interspersed with larger punctm-es ; the wings 

 flavo-hyaline, their apical margins faintly clouded, the nervures 

 pale testaceous ; the legs have a changeable golden lustre, that 

 on the posterior tibiae outside, very brilliant ; the calcaria, spines 

 and claws ferruginous. Abdomen covered with thin cinereous 

 pile, the apical margins of the segments with pale golden fascige, 

 the apical segment covered above with fusco-ferruginous pubes- 

 cence; the sides carinate; beneath, smooth and shining, with 

 scattered punctures ; the apical margins of the segments rufo- 

 piceous. 



Hab. Brazil (Villa Nova). 



38. Tachytes Pluto. 



Female. Length 8 lines. — Deep black : the face shining, the 

 sides covered with silvery pubescence ; the anterior margin of the 



p2 



