Plate XXXI 



Detdils of Clfirononuis Pupce 



Frontal tubercle of fiavicingula. 



Dorsal abdominal lol)e of lohiferus. 



Apieal lateral pi'oeess of segment 8 of decor us. 



Second dorsal al)donnnal segment of ffdvicinguhi. 



Ventral surface of apical segment of digitatus (female). 



Apical lateral pi-ocess of segment 8 of viridis. 



Second dorsal al^dominal segment of viridis. 



Dorsal abdominal setiila^ of viridis: a, h, and c, setuhv of 

 transverse group ; d, setula of central group. 



Second dorsal abdominal segment of digitatus. 



Third dorsal al)dominal segment of modcstus. 



a and h. Apical lateral pi'ocess of Cliironomus sj). A, show- 

 ing variation in form in dift'ei'ent individuals. 



Frontal tubercle of decor us. 



Third dorsal abdominal segment of indistinctus. 



Apical lateral process of segment 8 of mdistinctus. 



a, reticulation of abdominal segments; h, c, d, dorsal abdom- 

 inal setula^ of digitatus. 



Apical lateral process of segment 8 of paUiatus. 



Apical lateral process of segment 8 of modcstus. 



A]Mcal lateral i)rocess of segment 8 of flavicinguht. 



