89fi TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



fortunately been destroyed by building. H. 

 atricornis is much like the common H. nitidius- 

 culus or the less abundant H. minutus in outward 

 appearance ; but it is fractionally larger than 

 H. minutus, and has a longer face ; structurally, 

 however, the males are easily distinguishable 

 from all other Halieti by the form of the geni- 

 talia ; in H. atricornis the apex of each of the 

 stipites is produced into a narrow elongated stalk 

 with a knob at its end, in a way which easily 

 separates it from any other species, and ensures 

 it accurate identification upon examination with 

 a lens. The hybernated females of this bee 

 appear in May, and males and females emerge in 

 August and September, when 1hey frequent 

 flowers of the blackberry ; Mr. Cooke used to take 

 the males as early as July, or about three weeks 

 sooner than those of the allied H. minutus. The 

 burrows are excavated gregariously, generally in 

 banks at the sides of ditches. 



H. minutus, Kirb. — Pretty generally distributed, as 

 Chorlton and Bollin Yalley, J.R.H., near Man- 

 chester, B.C., Rainhill, H.H.H., Rock Ferry, 

 J.T.G., Wallasey and Hoylake. 



H. nitidiusculus, Kirb. — Also frequent over the district. 

 Chrysis ignita observed to frequent its burrows. 



H. minutissimus, Kirb. — Taken at Rainhill, H.H.H., and 

 Oxton, J.T.Gr. Probably overlooked elsewhere. 



H. tumulorum, Linn. — flavipes, Kirb., Sm. — Only 

 recorded as yet from Bowden, B.C., and Rock 

 Ferry, J.T.Gr., but probably only requires search- 

 ing for. 



H. Smeathmanellus, Kirb. — So far only noted from 

 Delamere, R.N., but this species again is pro- 





