102 



89 Fig. 29. Prolanceola vibiliformis Woltereck (after Vinogradov, 1957;general viiew, after 



Woltereck, 1909). 



Length of sexually mature individuals 11 to 14 mm. 



In females the body has a weakly developed dorsal keel, in males it 

 is smooth. 



In females the length of the 1st segment of the peduncle of antennae I 

 exceeds the length of the 2nd and 3rd segments together; the sharply 

 distally tapering proximal segment of the flagellum is 2-2.5 times longer 

 than the peduncle; the small 1st distal segment is half the length of the 

 2nd. In males the relative length of antennae I is roughly the same as 

 in females but the length of the peduncle is roughly equal to that of 

 the flagellum; the proximal segment of the flagellum is teardrop-shaped, 

 conical, and very broad in the proximal part. 



The labrum is rounded, with a shallow depression (notch) on the 

 anterior margin. The mandibles have a relatively short denticulate cutting 

 edge and a well-developed accessory plate; the 3rd segment of the palp 

 is longer than the 2nd and 1st segments together; the length of the palp 

 is less than 1.5 times that of the mandibular body. The outer lobe of 



