321 



Mandibles (Figure 559, B, C) black basally, reddish brown apically, 

 without teeth, except for a small, blunt, tooth- shaped process at dorsal 

 margin; median brush forming a row of golden yellow chaetoids; lateral 

 setae brown, dorsal seta longer and thicker than ventral. 



Maxillolabium, lateral as in Figure 560; mentum with wide, black, 

 transverse stripe; other sclerites yellow or yellowish brown; setae of 

 submentum relatively large. 



Pronotum blackish brown in concave, anterior part surrounded by ridge; 

 lateral and posterior parts light brown, with groups of small dots; posterior 

 margin with a narrow, black stripe; posterior-angle process wide, light, with 

 dark brown, lateral margin; small, thin spinules at anterior margin; both 

 primary and secondary setae present, the latter numerous, mainly laterally. 



Mesonotum reddish yellow, brownish at anterior margin, with a narrow, 

 black margin laterally and posteriorly; lateral margin with a large black 

 process. Secondary setae situated mainly at anterior angles and posteriorly. 



Anterior-median tergites of metathorax brownish, larger than posterior 

 tergites; lateral tergites with a blackish, transverse stripe; secondary 

 setae numerous. 



Propleuron with a black groove on pleural suture; episternum light 

 brown, epimeron yellow, with black dorsal margin; trochantin mainly black, 

 with a small seta and one setule. Pleurites of meso- and metathorax light 

 brown, the latter with broad posterior process; secondary setae numerous. 



Number and arrangement of gills of E. guttulata (after Nielsen) 



Segment 



Dorsal 



Pie 



ural 



Ventral 



2 



1 

 1 



1 



1 



1 

 1 



3 



1 

 1 



1 



1 



1 



1 



4 



1 

 1 



1 



1 



1 

 1 



5 



1 



1 



1 





1 

 1 



6 



1 

 1 







1 



1 



7 



1 



1 







1 

 1 



Ventral side of prothorax with a small, pale, weakly sclerotized sternite 

 with brown diverging lines at anterior angles near posterior margin. 

 Mesosternite represented by several yellow or brownish dots, metasternite 

 by a smaller number of such dots. 



Legs yellowish brown, some articulation with black margin; ratio of length 

 of legs 80:100:99. Forelegs relatively longer in young larva; ratio of length 

 of legs in 1st- stage larvae 87:100:98. Form of legs and their chaetotaxy in 

 Ist-stage and full-grown larvae as in Figure 561. Anterior setae of coxa 

 and anterior seta of trochanter branched at apex. 



403 



