of Exotic Hymenoptera. 81 



stigma and first submarginal cell yellowish. Abdomen : the iyso basal 

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

 second and third segments with naiTow yellow fasciae ; beneath blaclv, 

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

 ginous. 

 Hah. Ega (Brazil). 



2. Pison jlavo-pictus. 



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

 bus abdomineque flavo-notatis ; alls hyaliuis. 



Fetnale. Length 4 lines. Black, smooth and shining ; the clj'peus, 

 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 tegulae 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 reciuTent 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 

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

 rufo-fiiscous, and fen-uginous at the apex. 



Hab. St. Paul (Brazil). 



3. Pison IcBtus. 



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, mandibles, 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 scuteUmn, 

 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. 



Hah. Ega (Brazil). 



Genus Philanthtis, Fahr. 

 1. Philanthus {TrachypHS) cementarius. (Plate IV. fig. 18.) 



P. (1\) 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. u 



