II YMENOPTERA- ACULE AT A . 



397 



bably overlooked, as it is abundant in North 

 Wales. 

 Ft. morio, Fab. — ceratus, Kirb. — Another common species 

 which has escaped observation, as our only 

 records are from Hazlegrove, B.C., and Lindow 

 Common, near Manchester, J.R.H. 

 //. leucopus, Kirb. — Taken frequently at Chester, E.C.T. 

 Sphecodes, Latr. — A genus nearly related to the last- 

 named, and about the habits of which there has 

 been much discussion. On the one hand it is 

 held that the female excavates a nest for herself 

 and provisions the same for her offspring like any 

 ordinary solitary bee. On the other, it is repre- 

 sented that Sphecodes does not work, but is 

 inquiline upon other bees. There is no doubt 

 that Sphecodes associates very persistently with 

 bees of the genus Halictus, and also sometimes 

 with species of Andrena and Colletes. Examples 

 of this mutual connection are as follows, viz. : — 



S. gibbus 



S. retiadatus 

 S. subquadraUis 



S. spinulosus 



S. punctipcs 

 S. longulus 

 S. rubicund/us 

 S. pilijrons 



S. si in His 



S. affinis 



with Ft. rubicundus and other 



Halicti. 

 ,, Ft. prasinus. 

 ,, various Halicti and A. 



fulvicrus. 

 ,, Ft. xanthopus and A. 



fulvicrus f 

 ,, Ft. villosulus 1 

 ,, Ft. minutissirnus. 

 ,, A. lain alls. 

 ,, FF. leucozonius, A. humi- 



lis and C. cunicidaria. 

 ,, FF. quadrinotatus and A. 



fulvicrus. 

 ,, Ft. nitidiusculus, H. 



tumulorum and A. ful- 

 vicrus. 



