62 
The Irish NaturalisL 
April, 
Myrmica scabrinodis Nyl. — Males flying along the sea shore at Coolmore 
in the middle of September. 
M. ruginodis Nyl. — Males flying along the road on September 9th. 
Pompilus pectinipes V. de L. — A female, at Coolmore, on the roadside 
among herbage. 
Pemphredon lethifer Shuck. — A female, Poyntzpass, in June, in my fields. 
Salius exaltatus Fab. — Coolmore, in September. 
Mellinus arvensis L. — Coolmore, in September. I took females of this 
species flying about thistles on the sandhills, probably hunting for 
flies, of which there were a number about. I did not, however, see 
them attacking any. 
Crabro capitosus Shuck. — Poyntzpass, in June, on the roadside between 
my house and Poyntzpass. This species has been bred from bramble 
stems. 
C. varius Lep. — Poyntzpass, in August, in my fields. 
C. cephalotes Panz. {cavifrons Thoms). — Poyntzpass, in August, in one 
|of my fields. I had great difliculty in catching this bee, for it would 
keep among the brambles where to strike it was to expose my net 
to being torn to pieces. 
Odynerus pictus Curt, — Poyntzpass, in my garden on laurel. 
Halictus malachurus Kirby. — Poyntzpass, in August, Coolmore, in Sep- 
tember. All the specimens taken were males, for the females of 
this brood hardly leave their burrows and hibernate like the Humble 
Bees and Wasps. They do not make any cells in their burrows till 
the spring, when they start the new brood. 
H. longulus Smith, — Coolmore, in September ; also males, 
H. pauxillus Schenck, — Poyntzpass, in August ; Coolmore, in September, 
males, 
Andrena albicrus Kirby. — Coxtown, Co. Donegal, in June. Sent by my 
friend, W. A. Hamilton, Esq., J, P., who took it in his grounds at 
Coxtown. The Andrenae are often attacked by the little parasite 
Stylops, which assails them in the larval stage and causes curious 
alterations in the bee's appearance. One effect, which has been ob- 
served to occur in both males and females, is to cause the head to be 
smaller than ordinary. These bees are also attacked by the inquiline 
bee Nomada, which enters their burrows and lays its egg beside that 
of the Andrena, and its larva eats up the food intended for the 
Andrena's larva and comes to perfection in its stead. 
Psithyrus campestris Panz, — Coolmore, in September. This genus, like 
Nomada, is parasitic, but confines itself to one genus Bombus, while 
Nomada is thought to affect more than one genus. Then again 
Nomada is quite unlike its hosts in appearance and does not molest 
or be molested. Psithyrus, on the other hand, resembles its host 
very closely, and attacks and kills the queen Bombus and then 
assumes her place. 
Poyntzpass. 
