240 Messrs. A. D. Hobson and L. H. Mattliews on the 



ichneumons — Stenomacrus mtermediusj Hlgr., and S. ciihiceps, 

 Thor. (according to Mr. Morley probably )3arasitic on the 

 Mycetophilid?e) — were also very numerous in these two 

 flowers. Eighteen of the latter species were shaken from 

 two heads of one dandelion-plant. Any cross-pollination 

 which takes place on Jan .Mayen must be chietly due to 

 C. lasiophthalmus and the two ichneumons." [Bristowe,) 



13. Trichocera maculipennis , Mg. 



Hecorded by Becher, not found by Mr. Bristowe. 



14. Trichocera lutea, Becher. 



Several females were obtained by Mr. Bristowe. They are 

 dark in colour and do not show the yellow ground-colour 

 described by Becher, whose specimens were doubtless either 

 immature or discoloured by alcohol. The species is of 

 interest on account of a peculiarity of venation, r-m being 

 placed slightly hi-fore the fork of lis, 



" Found round a little pool at the base of the Saule rock. 

 One had got drowned, and, though in the middle of the pool, 

 was being scavenged by Bdella littoralisj Linn., a red mite 

 very common on the island. *"* (^Bristowe.) 



XXV. — The Animal Ecology oj King's College Chapel^ Cam- 

 bridge. — A Preliminary Note, By A. D. HoBSON, B.A., 

 Christ's College, and L. H. Matthews, B.A., King's 

 College *. 



This paper is a consideration of the relationships of the 

 animals living in the situation in question. The object is 

 not primarily entomological, although many of the animals 

 are insects. 



The place under consideration is peculiar, and must first be 

 described. The chapel has a double roof, the inner being 

 the stone vaulting, while the outer is composed of wooden 

 beams supporting the lead outer roof. There is a space 

 between the two roofs extending over the whole of the 

 chapel, and varying from 7 feet to 10 feet in height. This 

 space, which is about 80 feet above the ground, communicates 

 with the exterior by a window at each end. A gallery runs 



* From the Zoological Laboratorj^ Cambridge. 



