[Berliner Eiitomolog. Zeitsehr. Bd. XLT, Jahrg. 189G, Heft IV.] 323 



Prof. Miks orcniis Paracrocera (Cyrtidae), 



with a Postscript abont the genus Alloeoneurus Mik 



(Dolichop.) 



by 

 C. II. Osten Sachen. 



Dr. Griffini, in liis paper: „Di alcune Acroceridi italiani" 

 (Boll. dei Musei di Z. cd A. C. etc. di Torino, 28 May 1S9G) ex- 

 pressed tlie opinion tliat tlie genus Paracrocera Mik (Wien. Ent. 

 Z. 1886, p. 27G) is an unnecessary genus, and gave a reason for it. 

 Prof. Mik replied (W. E. Z. 1897, p. 44): „The genus which I have 

 scparatcd from Acroccra lias not been approved by the autlior; 

 whcther he is right" (?) the interrogation is Mik's, „will ich dahin 

 gestellt sein lassen," which means „I will Icave undecided". 



As I, some tinie ago, formed the sanie opinion about Paracro- 

 cera as Dr. Griffini, and have workcd up the question in detail, 

 I shall take advantage of this opportunity for making niy results 

 public.^) 



A Strange peculiarity of the genus Acrocera, and a peculiarity 

 that requires a further investigation, consists in the instability of its 

 venation, as the second longitudinal vein is, in many cases, entirely 

 absent; but in some other cases it is only stunted, either at its 

 distal, or at its proximal end. Thus, there are sometimes two, in 

 other cases only one submarginal cell; in the latter case it is the 

 second cell (formed by the fork of the third vein) which is pre- 

 sent; the first submarginal cell is, in such a case, coalescent with 



^) After issuing my successive papers, historical and critical, on 

 Blepharoceridae, I had prepared a rough draft of a siinilar work 

 on Cyrtidae, but upon Hearing that Mr. Wan dolleck in Berlin was 

 gatherii)^ materials for a coniplete monograph of that faniily, I handed 

 to him in October 1895 niy manuscript for use, or evenhial incorpo- 

 ration in bis werk. What I publish now is based upon the facts con- 

 tained in a paragraph on Acrocera in that manuscript, only more 

 developed for tlie purposo of publication. 



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