NOTES ON THE ACULEATE HYMEN OPTERA. 37 



Ccelioxys 4-dentata. This bee is the parasite of 31. 

 argentata; but is not so numerous, as I should have expected 

 to have found it. By very assiduous search, I captured 

 about twenty specimens. It is worthy of remark that in 

 the Isle of Wight, where I found Megachile maritima 

 abundant, its parasite Ccelioxys Vectis was very numerous, 

 as were also Saropoda bimaculata, and its parasite Ccelioxys 

 umbrina ; but at Deal, although Megachile maritima and 

 argentata were both abundant, their parasites Ccelioxys 

 Vectis and 4-dentata were scarce. 



JDasypoda hirtipes. We notice the capture of this 

 beautiful insect, by Mr. Dossetor at Redhill near Reigate, 

 and by myself at Deal, principally for the purpose of re- 

 cording a new phase in bee history. Entomologists are 

 well acquainted with the fact of immense numbers of 

 Lepidopterous and also Coleopterous insects flying by 

 night ; and thirteen years ago I recorded the fact of Vespa 

 crabro carrying on its labours by moonlight. Until the 

 present season I was not aware that any species of Apidce 

 took flight after dark ; but one moonlight night, walking 

 in the streets of Deal, I captured males of Dasypoda 

 hirtipes on the wing ; several large insects had flown about 

 our faces, but were supposed to be moths, until one got 

 entangled in my wife's head-dress, and on releasing it, 

 it proved to be Dasypoda. I should observe, that the 

 situation of the colonies of this bee are upwards of a mile 

 from the spot where we captured them at night. 



Stelis aterrima and phceoptera have both occurred this 

 season ; the first at Deal, and the latter near Exeter, where 

 it was captured by Mr. W. H. Parfitt, who observed it about 

 the burrows of Osmia cenea. 



Nomada borealis. Both sexes of this species were 

 captured by Mr. Dossetor and myself on Hampstead 



