Plate XL 

 Hypopygia of Cliironomince 



Cliironomus incognitus, one side. 



Chironomus curtilamellatus, one side. 



Campfochtdius suhaterrimus, one side. 



Mcfriocncmns hracliyneura, one side. 



Camptoclddius flavens: a, inner pi'occss of basal portion of 

 lateral arm ; h, apex of apical portion of lateral arm. 



Ortliochtdius suh par all el us, one side. 



Tricliodadius nitidus, one side. 



Tanytarsus similafiis: a, superior process; h, inferior proc- 

 ess. 



Campfocladius afcrrimus, one side. 



Orfhocladius favoscutellatus, one side. 



Camptocladius hyssinus, one side. 



Dacfjilocladius hrevinervis, one side. 



