402 Mr. H. St. J. Donistborpe on the Origin 



exclusively in birds' nests, the myrmecophilous habit may 

 be the more recent, and M. pulla have taken to it more 

 recently than 3f. gentilis. 



Oxypoda haemorrhoa, Mann. 



This little beetle, which is widely distributed, is found 

 " in moss, haystack refuse, etc. ; also found frequently in 

 nests of Formica rufa " (Fowler, /. c. p. 35). It has been 

 recorded with F. rufa from Guestling (Collett) ; Colchester 

 (Harwood) ; Hampstead and Highgate (Janson) ; Erith 

 (Waterhouse) ; Wellington College, Bradfield, etc. (Joy) ; 

 Wigmore Woods (Walker) ; Bentley Woods (Morley) ; 

 Egbaston and Sutton (Blatch) ; Knowle (Ellis) ; Scar- 

 borough (Wilkinson) ; Corbridge-on-Tyne and Chopwell 

 Woods (Bagnall) ; Scotland, " in nests of F. rufa" local 

 Forth, Dee and Moray (Sharp, Scot. Nat. ii. 1873-4, p. 

 191) ; Aviemore (Beare). I have taken it with the same 

 ant at Weybridge, New Forest, etc., with Lasius fuliginosiis 

 at Weybridge, with Formica exsccta at Bournemouth in 

 some numbers, and with F. sanguinea at Nethy Bridge, 

 Inverness-shire. 



Wasmann gives F. rnfa, pratensis, truncicola, and cxsecta 

 as its normal hosts. Although often occurring without 

 ants, still I think this insect has firmly established itself 

 as an ants' nest species, in spite of the fact that some one 

 told me a little while ago that because it was abundant in 

 his garden in London, it could have nothing to do with 

 ants. 



Myrmedonia haworthi, Steph. 



" Very rare ; in company with F. fuliginosa ; taken in 

 the vicinity of the nests by sweeping, also from under 

 dead leaves and moss " (Fowler, /. c. p. 55). Mr. Gorham 

 took a specimen with Lasius fnliginosus near Southend, 

 he lost tlie tube it was in, and went back to the nest and 

 found another specimen. Most of the few recent captures 

 have been taken running on paths, etc. 



Myrmedonia coUaris, Pk. 



Fowler writes (/. c. p. 56) — " In company with various 

 ants, or in their vicinity, at roots of grass, in moss, etc., in 

 marshy places ; it does not, however, ajjpear at all certain 

 that this and the preceding are necessarily associated with 



