THE GUESTS OF ANTS AND TERMITES. 87 



of this doubtful species. Dr. Kriiper caught it in great numbers from 

 the beginning* of March to the end of April on the Parnassus, but 

 never sent me a case thereof, perhaps never found one himself, so that 

 I was quite unable to send the case of this species to Milliere which 

 he none the less describes I His description from the Greek form 

 states that the forewings are ' a pointe apicale prononcee,' whilst the 

 apex of jndla is ' arrondie.' I do not attach much importance to this, 

 as the wing-form of the same species varies, and also, if this were not 

 so, every Fumea and Psi/che known to me has in general a rounded 

 apex. I only find that the Greek examples are somewhat more densely 

 scaled, therefore of a deeper black than my specimens (of pidla) from 

 Germany, France, Switzerland, and, in part, from Hungary and Castile, 

 Fresh specimens from Castile are still darker, also soinewhat smaller." 

 My first sight of this insect was a specimen from Greece, sent by 

 Staudinger to Chapman, and I observed at once that it could not possibly 

 be Eviclinopteryx pidla. Chapman had already critically examined it 

 and discovered that it had anterior tibial spurs, and, therefore, not 

 only could not possibly be a form of E. jyidla, but was referable to 

 Eambur's genus Psyckidea. An examination of the British Museum 

 material showed a long series of large -pidla, under the name of var. 

 f/raecella, but mixed with them three examples from Greece, exactly 

 like the one I had previously seen, and evidently belonging to 

 Psyckidea. In this series are two examples from Hyeres, caught by 

 Yerbury, and one of these (much rubbed) has a very pointed forewing. 

 There can be no question I think that these two Hyeres examples are 

 not (jraecclla, but I am at the same time not altogether satisfied that 

 they are E. pidla. With all due deference to the opinion of such a great 

 authority as Staudinger I would urge that Milliere is quite right, that 

 graecella has more pointed forewings than pidla, and that it is 

 abundantly distinct. It is possible, though, that Milliere's examples from 

 south France were not identical with the Greek ones, that they were 

 similar to the examples from Hyeres in the Brit. Mus. collection, and 

 that the case he describes as that of (jraecella is consequently that of a 

 species abundantly distinct from that of which he describes the imago, 

 very possibly not even congeneric. If the British Museum f/vaeceUa 

 are a fair sample of the insects in the various continental collections 

 passing under this name, one is able to understand why most 

 systematists make graecella a var. of E. pidla, as most of them are 

 typical E. pnlla ; but there can be no doubt that the graecella from 

 Greece sent out by Staudinger are an abundantly distinct species, and 

 one is astounded at Staudinger doubting its specific distinctness. The 

 anterior tibial spur is a character that will settle any doubt in a 

 minute. One would like to see the life-history of the doubtful Hyeres 

 examples solved, we rather suspect them to be distinct from E. pidla, 

 as they are apparently different from the examples of E. pnlla 

 obtained at Cannes, Alassio, and elsewhere on the Riviera in March 

 and April. 



The Guests of Ants and Termites. 



By E. WASMANN, S.J. (translated by H. DONISTHORPE, F.Z.S., F.E.S.). 

 {Continued from p. 75.) 

 Active mimicry, i.e., the imitation of the host's movements, 

 especially of its antennae, can be added to passive, i.e., the imitation of 



