DONISTHORPEA. 199 



subsequently strengthened with workers of D. umbrata from Welling- 

 ton College. On September 14th, 1913, two fertilized females, from 

 the Oxshott nest before mentioned, which had just removed their 

 wings, were introduced into the mixto -umbrata nest, when they 

 were very little attacked and completely accepted the same day. 

 The one died on October 12th, but the other has been treated by 

 the workers as their queen, having been fed, cleaned, and caressed 

 by them, and is still alive in this nest she laid her first eggs on 

 July 12th, 1914. 



As the females of D. fuliginosa are only slightly larger than the 

 workers, and as their fertility is delayed for so long a period, it is 

 clear that they are unable to found colonies unaided ; they are 

 hyper-temporary social parasites, since, as will be seen presently, 



D. umbrata and D. mixta are temporary social parasites of D. nigra 

 and D. aliena. 



The following species of Myrmecophiles have been taken with 

 this ant in Britain : 



Coleoptera : Homoeusa acuminata Mark., Aleochara ruficornis 

 Gr., Microglossa pulla Gyll., M. gentilis Mark., Oxypoda vittata 

 Mark., 0. haemorrhoa Sahib., Thiasophila angulata Er., T. inquilina 

 Mark., Ilyobates glabriventris Rye, /. bennetti Donis., Myrmedonia 

 haworthi Steph., M. limbata Pk., M. funesta Gr., M . humeralis Gr., 

 M. cognata Mark., M. lug ens Gr., M. laticollis Mark., Drusilla 

 canaliculata F., Notothecta confusa Mark., Homalota nitidula Kr., 

 H. analis Gr., H. exarata Shp., H. consanguinea Epp., Quedius 

 brevis Er., Heterothops sp ? (nigra Kr. ?), Xantholinus atratus Gr., 

 Othius myrmecophilus Kies., Batrisodes venustus Reich., Trichonyx 

 mdrkeli Aub., Ptenidium myrmecophilum Mots., P. gressneri Er., 

 Dendrophilus punctatus Hbst., and Amphotis marginata F. 



Formicidae : Ponera coarctata Latr., 8tenamma westwoodi West., 

 and Leptothorax nylanderi Forst. 



Braconidae : Aspilota nervosa Hal., and Chasmodon apterum 

 Nees. 



Proctotrupidae : Hoplogryon myrmecobius K., Tdeas myrme- 

 cobius K., Tropidopria fuliginosus Wasm., Exallonyx wasmanni K., 



E. wasmanni K. var. sociabilis K., E. myrmecophilus K., Lagy nodes 

 pallidus Boh., Bethylus formicarius Curt., Belyta furcata K. var. 

 formicaria K., Loxotropa formicarum K., Amblyaspis scutellaris K. 

 var. liyalinus K., A. lasiophilus K., A. lasiophilus K. var. rufo- 

 petiolatus K., Adista lasiophila K., and Leptorhaptus myrmecophilus 

 K. 



Chalcididae : Spalangia erythromera Forst. 



Cynipidae : Kleditoma myrmecophila K. 



Diptera : Phyllomyza lasiae Collin, Phyllomyza sp ?, Pseudacteon 

 (=Phora) formicarum Verrall, Apiochaeta ( = Phora) aequalis Wood, 

 A. longicostalis Wood, A. ciliata Zett., Milichia ludens Wahl., 

 Scatopse infumata Hal., S. transversalis L. var., Limosina curti- 



