398 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



The evidence in favour of inquilinism of this 

 genus is based upon general analogy, upon the 

 usual demeanour of the insect, upon the time 

 of appearance of imago, and the habit of hyber- 

 nation of same after the manner of Halictus. The 

 whole question is admirably dealt with by the 

 Rev. F. D. Morice in " Ent. Mon. Mag.," March- 

 April, 1901, from which the above summary is 

 taken. 



S. gibhus, Linn. — Fairly distributed ; specially noted 

 about Manchester, J.R.H., and Rock Ferry, J.T.G. 



S. subquadratus, Sm. — Only recorded so far from 

 Upton, near Chester, E.C.T. 



S. pilifrons, Thorns. — rufiventris, Sm. — Taken at Hazle- 

 grove and at Southport, B.C. ; freely upon the 

 sandhills at Wallasey ; at Chester, R.N. and 

 E.C.T., and at Ince, R.N. ;near Malpas. Three 

 specimens observed entering burrows of Colletes 

 cunicularia at Wallasey, R.N. (v. Ent. Mon. Mag., 

 May, 1901). 



|\S y . epphippia, Linn. — Widely distributed, as Rainhill, 

 H.H.H., Bowden, B.C., Chester and Delamere, 

 E.C.T. , Bebington, J.T.G.] 



S. affinis, v. Hag.— Hoylake ; Chester, E.C.T. 

 Andrena, Fab. — The females of this large genus burrow 

 eight to twelve inches deep in various situa- 

 tions ; some in vertical banks, some in slop- 

 ing undulations, and others in level ground 

 and even in hard trodden pathways. The 

 tunnels branch out below the entrance, and are 

 usually but very roughly made, in contradistinc- 

 tion to the well smoothed burrows of the genus 

 Halictus. Most of the species are gregarious, 

 such as A. fulva, nigrocenea, fulvicrus, albicrus, 



