During the early part of June a young friend of mine (Mr. Albert Norris) informed me that he had found pupae of the New Zealand "glow-worm" (Bolitophila luminosa) attached to rocks in the big gully of the Botanical Gardens, Wellington, which, from their shrivelled condition, appeared to have been killed by some parasitic insect. I at once examined one of these pupae, and found that it had been destroyed by a species of Hymenoptera, apparently nearly allied to the Family Ichneumonidae. The pupa of the parasite was imbedded in a quantity of refuse matter in the centre of the unfortunate glow-worm pupa. As is often the case with the Hymenoptera a single specimen only was contained in each host.
On June 21st one of the parasites appeared in the perfect condition. It was apterous, and resembled in the closest possible manner a worker ant ; on a further examination, however, I found that the insect was really referable to the Family Proctotrypidae. On June 23rd another parasite emerged. This specimen was furnished with ample wings, and is consequently the male.
The discovery of this parasite adds another chapter to the already remarkable life-history of the New Zealand luminous Dipteron.