416 Mr. H. St. J. Donisthorpe on the Colonisation of 



base of a fence in the London district on May 16th, 1857 

 (Zool. 1857, p. 1768). 



A specimen was swept near Tonbridge, by Horner 

 (E. M. M., 1885, xxii, p. 88). 



Chitty took two specimens in the spring of 1894, near 

 Doddington, in cart-ruts, full of water, and I took another 

 specimen in the same cart-ruts in May 1901 (E. M. M., 1902, 

 p. 74). 



We see by this that Homoeusa leaves the nests in 

 the spring, probably for pairing and to seek new nests. 

 Father Hugger has seen the pairing of this bettle in an 

 observation nest of L. nigcr (Wasmann). It is very like a 

 Dinarda in its habits and belongs to the indifferently 

 treated lodgers. Father Wasmann has occasionally seen 

 the licking of the beetle by its hosts, Z. niger, and 

 shows that when introduced into strange nests of the 

 same ant it is at least tolerated. 



Oxypoda vittata, Mark. 



Normal host. — Lasius ftdiginoms, Ltr. 



Father Wasmann once found it in some numbers with 

 Lasius hrunnc'us, in a tree in company with other guests 

 of L. fuliginosus. The hrunneus must have taken pos- 

 session of a tree that had been occupied by the latter ant. 

 He also took a single specimen in Oct(>ber and a single 

 specimen in November with Formica rufa in Dutch Lim- 

 burg, and has seen it in some numbers flying far from 

 a nest of L. fidiginosus. 



Dr. Sharp records it as very rare in Scotland, and away 

 from ants. ("Scot. Nat." II, 1873-4, p. 189.) 



Walker has taken it by sweeping at Witliam Park. 

 (" Oxford List, 1906," p. 13.) It belongs to the indifferently 

 tolerated lodgers, as do the next 8 species mentioned. 



Oxypoda formdceticola, Mark. 



Normal host. — Formica rvfa, L. 



Wasmann records a single specimen taken with F. fusca 

 in August in Dutch Limburg. I have bred this species 

 in F. o'ufct observation nests. 



Thiasojjhila angtdata, Er. 



Normal hosts. — Formica rvfa, L., and i^ratensis, De G. 



I took a single specimen in company with Lasius fuli- 

 ginosus at Oxshott on May 16th, 1900. I have shown th£|,t 



