322 NEW YORK STATE MUSEUM 



PLATE 22 



Chironomus flavus 



1 Ventral aspect of head of larva : a, antenna ; md, mandible ; mx, 



maxilla ; p, palpus ; by, hypopharynx ; 1, labium ; f, fan-membrane. 

 xl50 



2 Caudal end of larva : a, caudal setae ; b, blood gills. x35 



3 Lateral aspect of second and tbird abdominal segments of pupa. x35 



4 Spur of lateral fin of eighth segment of pupa. xGO 



Tanytarsus deflectus 



6 Respiratory organ of pupa. xlOO 



Chironomus sp. (81) 



7 Ventral aspect of mouth parts, labium and maxilla. xlOO 



CMronomus 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 fourth abdominal segment of pupa. x50 



Tanytarsus sp. 



13 Dorsal aspect of fourth abdominal segment. x40 



Chironomus modestus var. b. 



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 opipharynx 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. xoO 



Chironomus fulviventris 



24 Labium of larva. xlOO 



25 Antenna of larva. xlOO 



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



