284 HYMENOPTERA. 



geau has the metathorax transversely rugose. St. Fargeau does 

 not mention the sculpture ; his description would suit three or 

 four species, and is very incomplete. 



33. Larrada irrorata. 



Female. Length 7 lines. — Black : the face densely clothed 

 with golden pubescence ; the cheeks and vertex have a thin golden 

 pile. The mesothorax thinly covered with rich golden pile on 

 the sides of the thorax ; beneath, and on the metathorax, it is 

 silvery ; the disk of the metathorax transversel}^ rugose ; wings 

 ilavo-hyaline, their apical margins faintly clouded; the spines 

 which arm the tibia3 and tarsi ferruginous. Abdomen covered 

 with changeable silky pile ; the margins of the segments having 

 fascite of silvery pile, observable in diflPerent lights. 



Hab. Senegal. (Coll. F. Smith.) 



34. Larrada agilis. 



Female. Length 5 lines. — Black : the face thinly covered 

 with silvery pubescence ; the scape, mandibles and anterior mar- 

 gin of the clypeus bright ferruginous ; the vertex smooth, with- 

 out the usual tubercles or ridges which replace the posterior 

 ocelli. Thorax with a scattered glittering silvery pubescence; 

 the metathorax longitudinally rugose in the middle, the sides of 

 the disk transversely striated, as well as the truncation, which is 

 coarsely grooved, and has a deeply impressed line in the centre ; 

 the sides of the metathorax obliquely striated ; the wings hya- 

 line, their apical margins faintly clouded, the nervures and tegulse 

 behind, rufo-testaceous ; the tarsi bright ferruginous, their basal 

 joint black ; the tips of the posterior femora with a ])atch of fer- 

 ruginous pubescence within; the posterior tibiss not grooved 

 longitudinally, as in the majority of the species. Abdomen 

 attenuated at the base and apex, narrow and elongate ; the pos- 

 terior margins of the segments covered with silvery pile, obser- 

 vable in different lights. 



Hab. The Gambia. (Coll. F. Smith.) 



35. Larrada Crcesus. 



Female. Length 7 lines. — Black : the head, thorax and abdo- 

 men covered v\'ith golden pubescence ; on the vertex it is sparing, 

 and the apical margins of the segments of the abdomen have 

 bright golden fasciae, which are more or less brilliant in different 

 lights; the mandibles and scape in front dark rufo-piceous ; the 

 sides of the thorax, the coxse and femora, covered with cinereous 

 pile, that on the tibise and tarsi golden; the tarsi, the spines 



