BEE-LIKE DRONE-FLY. 



PLATE 33 



GIRDLED DRONE-FLY. 



Page 248 



These flies, which have a superficial resemblance to bees and wasps, were held 



formerly to be parasites upon their hosts ; but they are now known to be beneficent 



scavengers, helping to keep the nest clean. 



Photos by Author. 



