150 C. R. Osten Säcken: 



of Macquart's share in the discovery of the genus. At the time 

 when I was preparing the second edition of my Catalogue (which 

 appeared in 1878) Loew urged me in one of his letters to adopt the 

 new family-name in it, and I confess that I regret not having doue 

 so. But there is no reason to prevent me from doing so now that 

 I better understand the propriety of this improvement. 



Loew is the founder of the family. His definition of it (1862), 

 at a time when it consisted of two genera only, is just as available 

 now, when there are ten of them: „Thrce ocelli; wings ample, bare, 

 with creases apparently caused by folding; no discal cell; posterior 

 tibiae with stout spurs, anterior tibiae unarmed." 



Both family-names were proposed by Loew, and 1 deem it 

 just, as well as expedient, to accept the very appropriate narae which 

 he preferred, instead of that which he reluctantly adopted. Senseless 

 names of genera may be tolerated, but those of families, as having a 

 wider bearing, should be rejected.') 



IL Survey of the eharaeters oftheLiponeuridae, 



arranged synoptically for the purpose of facilitating the task of 

 future describers. 

 This Survey of the eharaeters of the Liponeuridae is, in the 

 main, an English translation of my publication on the same subject 

 in German in the Deutsche Ent. Zeitschr. 1878, p. 413, but with 

 additions and corrections representing the progress made since that 

 time. It must be borne in mind, in using this Survey, that it was 

 compiled by me long ago, in part from existing descriptions, in part 

 also from notes, taken by me in visiting ditferent collections, princi- 

 pally during my travels in Europe in 1877 und 1878 (comp. 0. S. 

 1878, p. 406). Such a method is liable to bring about inaccuracies, 

 which it would be impossible for me to correct at present. Speciraens 

 of this family are comparatively rare in collections: raany of them 

 are uniques, scattered over two continents. All I have before me 

 now in my own very small collection, consists of a speciraen of lÄ- 

 poneura cinerascens, which I took in the Pyrenees, and a male of 

 Lipon, yosemite, caught by me in California. If I persist nevertheless 

 in Publishing this Survey in an English edition brought up to date, 



^) There is a dangerous resemblance between the names of Ble- 

 pharocera and Blepharoptera, both genera of Diptera. Loew him- 

 self feil a victim to this resemblance when. in 1863, he described 

 Blepharocera capitata (Cent. IV^, 43) as Blepharoptera capitata. 

 This is not a sufficient reason, however, for giving up either of these 

 generic names. 



