of Exotic Hymenoptera. 153 



long sooty-black pubescence on the front and beneath, the cheeks with 

 a short downy cinereous pile. The disk of the thorax with silvery- 

 white pubescence; the apical joints of the anterior and intermediate 

 tarsi, and the posterior tibiae and tarsi rufo-piceous ; wings fusco- 

 hyaline. Abdomen : the pubescence on the first four segments short, 

 dense and black, that on the two apical ones silvery-white. 

 Hub. Northern India. In the British Museum Collection. 



2. Bornbus opulentus. 



B. niger, pubescens ; vertice, thorace supra, abdominisque basi pube lsete 

 fulva vestitis ; alis nigro-fuscis. 



Female. Length 9 lines. Black, pubescent ; the pubescence on the 

 face black, that on the vertex fulvous. The thorax clothed above with 

 fulvous pubescence, a tuft of the same colour beneath the wings ; the 

 pubescence on the legs black, that on the basal joint of the posterior 

 tarsi within obscurely ferruginous, the apical joints of the tarsi rufo- 

 piceous. Abdomen : a large quadrate patch of fulvous pubescence at 

 the base above, extending to the apical margin of the second segment, 

 the pubescence otherwise intensely black. The wings dark brown. 



Hub. North China. 



This beautiful species was captured by Mr. E. Fortune : it is in 

 the Collection of the British Museum. 



3. Bornbus laboriosus. 



B. niger, pubescens; thoracis lateribus, abdominisque tribus segmentis 

 basalibus pube pallido-flava vestitis, segnientis apicalibus pilis ferru- 

 gineis tectis. 



Female. Length 8 lines. Black, pubescent ; the head entirely black, 

 with the clypeus very smooth and shining, and delicately punctured. 

 The thorax with black pubescence above and beneath, that on the sides 

 pale yellow; the pubescence on the legs entirely black; the wings 

 fusco-hyaline, the nervures black. Abdomen : the three basal segments 

 clothed with pubescence of a pale yellow, somewhat lemon-coloured ; 

 that on the third segment not quite extending to the lateral margins ; 

 the apical segment thinly sprinkled with ferruginous hairs. 

 Worker. Length 5 lines. Coloured like the female. 



Sab. Oajaca (Mexico). In the Collection of the British Museum. 



4. Bornbus modestus. 



B. niger, pubescens ; thorace antice, scutello, abdominisque apice flavis. 

 Female. Length 9 lines. Black, pubescent ; the clypeus very smooth, 

 shining, and delicately punctured. Thorax : the pubescence above 

 before the wings yellow; the scutellum with a slight achrrixture of 



