\ 

 Synonymy of Antocha O. S. cmd Orimargula Mik. S13 



Scutellar bristlcs: four, of about equal length, the middle 

 pair decussate. i) 



As long as the chaetotaxy of all the known genera is not 

 worked out, it will be necessary to go into this detail, in describing 

 a genus; later, it will be sufficient to iudicate the differences. The 

 application of chaetotaxy is not very difficult, as soon as its ter- 

 niinology is thoroughly mastered, and its more general use Avill afford, 

 I think, an excellent index of the affinities of genera. 



Heidelberg, Germany, May 20. 1890. 



Synonymy of Antocha O. S. and 

 Orimargula Mik 



by C. R. Osten Sacken. 



In my Studies on Tipiüidae (Berl. Ent. Zeitsch. 1887, p. 187) 

 I said: 



„Orimargula alpigena Mik, Wien Ent. Z. 1883, p. 198, w. flg., 

 from the austrian and bavarian Alps, is an Antocha with an open 

 discal cell. The generic agreement is perfect. It seems to nie that 

 in Prof. Mik's fignre the auxiliary vein is represented as too far 

 remote from the first longitudinal. I remembfir seeing this species 

 in Dr. Loew's collection many years ago; the specimens are in the 

 Berlin Museum now, and are labelled: Kochel, Bavarian Alps, 

 August 1867." — 



Whereupon Prof. Mik answered (Wien. Ent. Zeit. 1888, p. 226): 



„In Bezug darauf, ob meine Gattungen Orimargula und Sym- 

 plectomorpha mit Recht eingezogen werden, behalte ich mir vor, an 



i) It was Dr. Schnabl in Wavsaw who introduced the term 

 decussate (Kreuzborsten) to describe the position of macrochaetae 

 crossing each other, as they.sometimes do, on the head, or the scutellum. 

 The term, derived from the latin decem (X), is very happily chosen 

 and has already been used in bofany. Thus we now have, for the 

 relative position of a pair of bristles, the following terms: erect, di- 

 verging, converging, decussate, proclinate (pointing forwards) and re- 

 clinate (pointing backwards). - 



