( vi ) 



Rhinia apicaUs, Wied., the species sent by Mr. Laniboru 

 or one closely allied to it, ranged from West Africa to Natal. 



Prof. PouLTON also exhibited the 7 examples of Bengalia 

 depressa, Walk., which had been captured by Mr. Lamborn, 

 Nov. 7, 1913, attacking the driver ants on the march. One 

 of these specimens had been exhibited to the Society on 

 December 3 (Proc. 1913, p. cxxv). Five of the Bengalia 

 were accompanied by the pupae they were sucking, together 

 with the 5 ants, from which they had been stolen. It was 

 interesting to note that all 7 flies were females. 



The workers of Dorylus nigricans, Illig., captured on Nov. 7, 

 were divisible into 6 sizes although transitional forms were 

 present. Calling No. 1 the largest and No. 6 the smallest, 

 two of the ants from which pupae had been taken were 

 No. 3, while the other three were No. 4. It therefore appeared 

 probable that pupae were generally carried by workers of 

 medium size. 



" On December 10, my colleague, Mr. Farquharson, told 

 me in the early morning that he had just passed a swarm of 

 driver ants which he thought were possibly raiding a bees" 

 nest, on account of a humming noise he had heard coming 

 from under some fallen palms. He did not stay to make a 

 close examination, being anxious for me to come at once. 

 On going to investigate the matter, I found that the drivers 

 were forming one of their temporary nests and were throwing 

 up earthworks, piling the earth in cones, between which were 

 funnel-shaped openings leading into the ground. 



" Flying over the drivers were a number of Diptera from 

 which came the humming sound. 



" There were three kinds :• — (1) A, much the most common 

 fly, flew to and fro over the funnels, gradually extruding a 

 white ovum which it dropped when no ants were by. If, 

 as sometimes happened, ants menaced it, the fly flew off to 

 another opening and let its egg fall there. Many of these 

 eggs could be seen on the ground, and the drivers did not 

 touch them or even examine them as far as I could see, but 

 in the natural course of their work gradually covered them 

 with earth." 



[The material labelled A consisted of G females of the 



