(528) 



528 



others; 3 setae and 1—2 very small setae situated posteriorly in the middle. 



Mandibles (Figure 74 1) brown, slightly concave dorsally, convex ventrally, 



with pointed apex and with finely serrated 

 blade; right mandible with 2 teeth, left 

 mandible with 4 teeth, 2 of them large; 

 broad base of mandible with a group of short, 

 brownish yellow setae on the outer side of 

 which the "primary" setae are slightly 

 thicker and stronger. 



Wing sheaths reaching abdominal 

 segments 5—6; hind legs reaching segment 8; 

 natatorial comb of midlegs dense, present 

 on tarsal segments 1—3; setae shorter on 

 the ventral side, longer on the dorsal side 

 (Figure 742). 



Abdominal gills situated near posterior 

 margin of the segments, ventral and pleural. 

 Pleural gills larger than ventral gills on 

 segments 2—7, flattened and conical near 

 the base; cone continues into the stalk of 

 the ordinary branched gill; number of 

 filaments in pleural gills as follows: 

 11:32; 111:27-29; IV:23-24; V:20-22; 

 VI:20— 21; VII:18. Ventral gills of segment2 

 with 3 stalks: 1 lateral and 2 median; 

 ventral gills of segments 3—5 with 2 median 

 stalks; ventral gills of segments 6—7 with 

 1 median stalk; base of the two median 



stalks situated close together; lateroventral gill of segment 2 situated at a 



distance from the 2 median gills; number of filaments in the ventral gills 



given in Table 2 6. 



FIGURE 744. Macronema radiatum 

 McL. End of body of male pupa, ventral 



TABLE 26 



Segment 



Ventral 













lateral 







median 



2 



20 







24+17 



3 



- 







21+19 



4 



- 







25+17 



5 



- 







24+17 



6 



- 







29 



7 



- 







17 



Presegmental plates (Figure 743) present on segments 3— 8, postseg- 

 mental plates on segment 3; denticles large and small; number of denticles 

 of presegmental plates listed in Table 2 7. 



603 



