— 64 



INTRODUCTION 



We described, during the war, several new species of the 

 îarval stages of Blepharoceridœ from the European mountains 

 Caucasian and Balkan, where thèse Diptera had not yet been 

 collected. 



Before the war, there were only 3 Iarval species of that family 

 known in Europa. Then from my excursions in the Caucasian 

 and Balkan I brought six new species belonging to the genus 

 Liponeura and Blepharocera. The descriptions published during 

 the war were probably inaccessible to the greater scientifical 

 Society. 



On the invitation of Mr. LESTAGE, I shall now give a short 

 review of ail hitherto described larvae of the European Blepharo- 

 ceridœ . 



* 

 * * 



LARV/E. 



Thèse larvae are most interesting insects. 



The whole body consist of eight segments (not seven = COM- 

 STOCK) of which the nrst is a cephalothorax-like segment, con- 

 taining the head, thorax and the nrst abdominal segment. It 

 can be best seen on the dorsal chitin-plates of Liponeura platy- 

 frons or larva from Zchenes-Zchali. 



On the ventral side of the little dcrsoventral fîattened body, 

 each of the seven segments, except the last two, bears a suker 

 the cavity of which extends fa\ into the body. 



I described very detailed the mcrphology and physiology of 

 thèse suckers in a spécial publication (I). 



Thèse remarkable larvae are apneustic and breathe solely by 

 tufts of tracheal-gills attached to the undersides of the second 

 to sixth abdominal segments. The number of gills in every tuft 

 is used as a systematic character. Also immediately in front 



(1) KOMAREK, Die Morphologie und Physiologie der Haftscheiben der 

 Blepharoceriden-Larven. (Sitzunsber. Kônisl. Bohm. Ges. Wissensch. Praq 



1914, p. 1-28, 10 fig.). 



