NOTES ON HYMENOPTERA. 77 



H. malachura as a mere variety of ^. cylindricns, and I was 

 partly led to do so from the circumstance of finding the 

 same opinion expressed by Mr. Kirby in an interleaved copy 

 of his Apum Angliae ; and also from the fact of my never 

 having found the insect in the London district, whence Mr. 

 Kirby received it; I was also unable to detect any good 

 specific difference in the typical specimen, in consequence of 

 its faded and imperfect condition. 



I have now the pleasure of re-establishing this species, and 

 of pointing out the particulars in which it differs from H. 

 Cj//?7«f/rz<:'W5, which it closely resembles ; it differs from that 

 species in having the clypeus less produced, the tegulae 

 black, the base of the metathorax less coarsely sculptured, 

 and in wanting the sharp elevated ridge at the mai'gin of the 

 truncation; the legs are- entirely black, and the pubescence 

 whiter; the margins of the abdominal segments are not rufo- 

 testaceous. 



I am also inclined to think, that the Halictus 7MJicornu 

 will prove to be the male of S. malachura. 



Of the genus Andrena, I only observed three species, — the 

 And7'ena simillima, tridentata and 7ninutula. 1 have only- 

 oaee before taken AndreJia tridentata; in 1864 1 found a 

 few specimens on the ragwort, near Chirstchurch, Hants; 

 I found it on the same flower at Cromer. Only one 

 species of Nomada occurred, N. solidaginis; Bomhus 

 muscorum, sylvarum, fragrans, terrestris, lucorum and 

 lapidarius. 



Of the fossorial group I found very few, although, in ordi- 

 nary seasons, August is the month when they are usually 

 abundant; the following are all that I noticed: — T/phia 

 femorata ; Pompilusfuscu.f, (jihhus, plumbeus; Ammophila 

 sabulosa; Tachytes pomjnliformis ; Melllnus arvensis; 

 Crabro Panzeri, Walkeriy obliquuSj cephalotes, cribra7'ius, 



