MAY FLIES AND MIDGES OF NEW YORK 319 



Chlronomus modestus 



8 Eighth segment and anal appendage of pupa. x50 



9 Antenna of larva. xlOO 



10 Labrum, ventral aspect : la, lateral arms. xlOO 



11 Ventral aspect: 1, labrum; md, mandible; mx, maxilla; p, palpus; 



f, fan-like membrane. xlOO 



12 Dorsal aspect of foiu-th abdominal segment of pupa. x50 



Tanytarsus sp. 



13 Dorsal aspect of fourth abdominal segment. x40 



Chironomus modestus var. h. 



14 Dorsal aspect of posterior part of abdomen of pupa. x40 



Chironomus modestus var. a. 



15 Dorsal aspect of fourth segment of abdomen of pupa. x50 



16 Lateral fin of the eighth abdominal segment of pupa. x50 



Tanytarsus sp. 



17 Lateral fin of the eighth abdominal segment of pupa. x40 



18 Spur of the lateral fin ; possibly of another species. xlOO 



Chironomus fulviventris 



19 Posterior comb of the epipharynx of the larva. xlOO 



* Chironomus (?) fulvus 



20 Dorsal aspect of abdominal segment of pupa. x50 



Chironomus sp. (84) 



21 Labium of larva. xlOO 



Chironomus sp. (82) 



22 Labium of larva. xlSO 



Chironomus (?) fulvus 



23 Lateral fin of the eighth segment of pupa. x50 



Chironomus fulviventris 



24 Labium of larva. xlOO 



25 Antenna of larva. xlOO 



26 Lateral fin of the eighth abdominal segment of pupa. xlOO 



PLATE 23 

 Chironomus dorsalis 



1 Labium of larva (after :Miall and Hammond, 1900). xlOO 



Chironomus lohiferus 



2 Antenna of larva. xlOO 



3 Ventral aspect of larval head: 1, labium; mx, maxilla; p, palpus 



f, fan-like membrane. xlOO 



4 Lobe of an abdominal segment of the imago. xlOO 



5 Comb of the lateral fin of the eighth segment of the pupa. x400 



Chironomus sp. (83) 

 € Labium of larva. xl80 



