of Exotic Hymenoptera. 81 



stigrna and first submarginal cell yellowish. Abdomen : the two basal 

 segments ferruginous, the rest black ; the apical margins of the first, 

 second and third segments with narrow yellow fasciae ; beneath black, 

 with the first segment and a spot on each side of the second ferru- 

 ginous. 

 Hab. Ega (Brazil). 



2. Pison Jkwo-pictus. 



P. niger, laevis nitidusque ; capite antice argenteo-villoso ; thorace, pedi- 

 bus abdomineque flavo-notatis ; alis hyalinis. 



Female. Length 4 lines. Black, smooth and shining ; the clypeus, 

 scape, and mandibles yellow, the latter rufo-piceous at their apex, the 

 scape with a black line outside ; the face and cheeks densely covered 

 with silvery pubescence ; the vertex very finely punctured. Thorax : 

 the collar, tubercles, a spot on the tegulas in front, and two large ones 

 on the scutellum, yellow ; the wings hyaline and iridescent, the ner- 

 vures testaceous, the stigma fuscous ; the base of the metathorax longi- 

 tudinally striated; the two recurrent nervures received within the 

 second submarginal cell ; the tips of the femora, the tibiae and tarsi 

 pale yellow, the tips of the posterior tibiae and of the intermediate pair 

 beneath black; the apex of the joints of the tarsi and the claw-joint 

 fuscous ; a yellow spot on the coxae. Abdomen : a large ovate yellow 

 macula on each side of the second segment ; the apical segment rugose, 

 rufo-fuscous, and ferruginous at the apex. 



Hab. St. Paid (Brazil). 



3. Pison Icetus. 



P. niger, flavo-maculatus ; metathoracis basi longitudinaliter striata ; ab- 

 domine laevi, nitido ; alis subhyalinis. 



Female. Length 5 lines. Black; the head and thorax slightly 

 shining and finely punctured ; the clypeus, mandible*, and scape yellow, 

 the basal half of the latter black behind ; the clypeus, lower portion of 

 the inner orbits of the eyes and the cheeks with silvery pubescence ; 

 the collar, tubercles, tegulae in front, two ovate spots on the scutellum, 

 the anterior and intermediate tibiae in front, and a spot at the base of 

 the posterior pair beneath, yellow ; the base of the metathorax longi- 

 tudinally striated, the sides with a little silvery pubescence ; wings 

 fusco-hyaline, the nervures fuscous. Abdomen smooth and shining, 

 with an ovate macula on each side of the second segment. 



Hab. Ega (Brazil). 



Genus Philanthus, Fabr. 

 1. Philanthus (Trachypus) cementarius. (Plate IV. fig. 18.) 



P. (2\) melleo-flavus, lucidus ; capitis vertice et thorace supra nigris, flavo- 

 vittatis ; alis flavo-hyalinis. 



Female. Length 8 lines. Honey-yellow ; the vertex black above the 



VOL. I. g 



