XXin. TEEMÉSZETRAJZI FÜZETEK. 1900. 



NOTES ON SO^VÍE EUROPEAN SPECIES 



OF CALLIPHOEINAE, MUSCINAE MUSCAEFOEMES AND 



AIUSCINAE ARICIAEFOEMES 



IN THE COLLECTION OF THE HUNGAEIAN NATIONAÍ.-:\írsEr:\I. 



By Gaery de X. Hough, Xew-Bedford. 



A large amount of European material in these groups having been 

 recently submitted to me for study and determination, a few remarks from 

 me may not be out of order. 



Calliphorinae. 



Onesia. — Genus Onesia was well represented. There was one spe- 

 cimen of the rare O. aJpiifu, not in very good condition, but sufficiently 

 well preserved to be sure of its identity. 



One specimen could only be referred to O. clausa Macq. This may 

 be a variety of 0. rrxjriUo but is certainly noth the same as 0. pnlita Mik. 

 of which several specimens were found. 



0. sejndcralis and 0. tH'spillo need further study. Whatever Cha- 

 rakters be assumed to separate these species specimens occur which seem 

 to be intermediate, whethei- we take the Charakters given by Schiner by 

 EoNDANi or by Stróbl. This is true to such an extent that I have been 

 tempted to believe that they are mere varieties and not true species. The 

 extreme forms seem quite distinct but the intermediate forms ai'e so nu- 

 merous that it seems as though they must be hybrids. Any one studying 

 the large series of this collection will, I feel sure, agree with my conclusion 

 viz, that we have here either two species which hybridize readily or that 

 there is but one very variable species. The result is the same whether we 

 consider the color differences, the cuivature of the fourth longitudinal vein 

 beyond the elbow, the length of the third antenna! joint, the size of the 

 l^ypopygium, or the chaetotaxy ; no constant difference can I find. 



0. cognata and gcatilh I believe are varieties of one species. Prof. 

 Stróbl practically makes the same sugestion in his Dipt. Steiermark. 



Pollenia. — Among the Polleniae there is one grand prize. I refer to 

 a specimen of P. dasypoda Portsch. No other specimen has been referred 

 to in literature since original description. 



