424 Mr. H, St. J. Donisthorpe on the Colonisation of 



List, 1899," p. 31.) I took a specimen in a sand-pit at 

 Weybridge on 29th April, 1895. W. E. Sharp found a 

 specimen under the bark of a tree near a nest of F. rufa 

 at Burnham Beeches. (" Vic. Hist., Bucks., 1905," p. 7G.) 

 I found the larvae in some numbers in a nest of Lasius 

 fiUiginosus at Wellington College. I have bred it in my 

 observation nest of F. rufa (two specimens came out of 

 the nest this year, one on January 28th, and the second on 

 February 19th), and have shown it protects itself from 

 the ants. 



This and the next species belong to the hostile perse- 

 cuted lodgers. 



Xantholimbs atratus, Hear. 



Normal hosts. — Formica rufa, L., pratenis, De G., and 

 Lasius fuliginosus, Ltr. 



Linnell records a specimen taken crawling in the sand of 

 the cutting at Keigate tunnel in April 1865, and two 

 specimens in a saud-pit at Dorking in April 1867. 

 ('•'Reigate List, 1878," p. 44.) 



The only British record with L. fuliginosus is that of 

 Mr. H. W. Ellis at Knowle. (" Ent. Rec," 1908, p. 57.) 



Claviger testacezis, Preys. 



Primary host. — Lasius flavus, De G. 



Secondary hosts. — Lasius alicnus, Forst., and niger, L. 



It was once found in a nest of Tapinonia erratica by 

 Von Hagens. Striibing found four specimens in a nest of 

 L. niger, which appeared to have belonged to L. flavus and 

 to have been taken by the former ants, a few specimens of 

 the latter beiog still in the nest. The first specimen 

 taken in Britain was captured by Professor Westwood in 

 Oxfordshire on August 30th, 1838, in a nest of L. flavus. 

 It was attached to a winged $ on the under-side. This 

 suggests a possible method of being taken out of the old 

 nest. 



Although Mliller in 1818 gave some account of the 

 habits of the curious beetles of the genus Claviger, show- 

 ing them to be true guests, etc. (" Germar's Mag.," Ill, pp. 

 57-112), nothing is known to this day of their true life 

 history, of how and where the eggs are laid, or even of 

 their larvae ! The problem has been investigated by 

 Janet, Wasmann, Hetschko, Schmitz and others without 



