distodorsal seta dark, slightly longer, a row of 4—5 secondary setae more 

 basally; posterior distodorsal seta very long, situated in a dense row of 

 long, secondary setae which become sparser and smaller toward base; 

 both primary, anterior setae short, dark brown, situated in distal part; 

 distoventral setae larger, of equal length; secondary, surface setae small, 

 sparse; ventral side with 8—9 larger setae. 



5'tl 



FIGURES 543-547. Drusus c a u c a si c u s Ulm.: 



543 — prothoracic horn; 544 — left legs: foreleg with its branched setae (A), hind leg (B), 

 anterior; 545 — tergite of abdominal segment 9; 546 — right anal leg', lateral; 547 — 

 larval case. 



Anterior seta of trochanter thick, spine- shaped, light; posterior seta 

 dark, both short; anterior distoventral seta in form of a large, yellow spine; 

 intermediate distoventral seta short, spine-shaped; basal distoventral seta 

 strong, moderately long; posterior apical ventral seta long; subapical seta 

 slightly smaller, both thick, brownish; basal segment usually with a short, 

 thin, secondary seta. 



Mid-femur slightly narrower distally, with slightly convex dorsal side and 

 almost straight ventral surface; apical dorsal seta strong, basodorsal seta 

 thin, situated in a dense, marginal row of long, secondary' setae; anterior 



394 



