246 THE ENTOMOLOGISt. 



appear on the sternum of their host earher than on the abdomen. 

 Moreover, all the Odonata carrying Acari on their wings which 

 have come under our notice belong to the Anisopterid division, 

 whereas all the Zygopterid dragonflies which we have known to 

 be infested have borne their parasites upon the inferior surface 

 of the thorax or abdomen, or both, but never on the wings. 

 Also, as we have seen in the case of the Anisopterid Sympetrum 

 meridionale, mites attach themselves to the lower surface of the 

 wings more readily than to the upper surface. These circum- 

 stances will be better understood when it is remembered that 

 Anisopterid dragonflies rest with their wings spread out hori- 

 zontally, while Zygopterid dragonflies in a state of repose 

 generally hold their wings erect. And the frequency with which 

 the smaller dragonflies are attacked is no doubt accounted for 

 by the fact that they habitually cling to rushes and other aquatic 

 vegetation when not in flight, while the larger species usually 

 take shelter among the branches of trees, high above the level 

 of the water. 



Our cordial thanks are due to Mr. Albert D. Michael both 

 for directing our correspondence with specialists and for perusing 

 these notes in draft ; to Mr. Francis P. Marchant for helping with 

 the Kussian literature consulted ; and to Mr. W. F. Kirby for kind 

 and ready assistance rendered on this and many other occasions. 



Note. — Since the foregoing was written, I have had the advantage of dis- 

 cussing this matter with Dr. F. Ris during an interview with him at i3russels. 

 Although Sympetrum meridionale and S.fonscolovihii are the only Odonata 

 he has met with carrying Acari on the wings, he has found several imaginal 

 Anisopterids — such as Cordulia cenea, Libellula quadrimaculata, and species 

 of Leucorrliinia — having Acari on the thorax and abdomen. Furthermore, 

 he told me that a large proportion of the nymphs collected by him in Swit- 

 zerland have been infested with Acariue parasites, and, in the cases of Syni- 

 2ietrum sanguincum and Enallagma cyathigeru?)i, he has actually' witnessed 

 the mites passing from the nymphal skin on to the skin of the imago while 

 the emergence of the dragonfly has been taking place. — H. C. 



33, Maude Terrace, Walthamstow : Sept. 6th, 1909. 



SIX WEEKS AMONGST HUNGARIAN BUTTERFLIES.* 



By W. G. Sheldon, F.E.S. 



With so much of Eastern Europe at present closed to the 

 lepidopterist who values his safe return home, Hungary offers one 

 of the chief centres for observing certain butterflies, the area of 

 distribution of which does not extend so far west as the Alps ; 

 and for this reason most of us get there sooner or later. 



* Among other comparatively recent papers on Hungarian butterflies 

 may be mentioned two published in this Journal :— " A Fortnight's Collecting 

 at Budapest," by W. E. Nicholson, F.E.S. (vol. xxv. pp. 191-193, 210-212) ; 

 " Two Seasons among the Butterflies of Hungary and Austria," by Margaret 

 E. Fountaine, F.E.S. (vol. xxxi. pp. 281-89). 



