MAY FLIES AND MIDGES OF NEW YORK 321 



PLATE 25 

 Orthocladius fugax 



1 Mandible of larva. xl50 



2 Ventral aspect of mouth parts of larva : 1, labium ; mx, maxilla ; p, 



palpus ■ by, hypopharynx 



3 Latero-ventral aspect of labrum of larva : a, antenna ; ep, epipbarynx ; 



e, lateral arm. xloO 



4 Respiratory organ of pupa. xl50 



5 A pectinate hair from anterior prolegs of larva. x4C0 



6 Caudal end of larva. x(10 



7 Lateral aspect of second, tbird and fonrtb abdominal segments of pupa. 



x60 



8 Claw of posterior proleg of larva. x250 



9 Peripberal claw of posterior proleg of larva. x250 



11 Dorsal aspect of flftb abdominal segment of pupa 



Orthocladius sordidellus 



12 Ventral aspect of labrum of larva. xlSO 



13 Antenna of larva. xlSO 



14 Ventral aspect of moutb parts of larva: 1, labium; md, mandible; 



mx, maxilla ; p, palpus ; Ir, labrum. x250 



15 Lateral aspect of abdominal segment of pupa. xl50 



Tanytarsus dissimilis 



16 A^entral aspect of moutb parts of larva: 1, labium; md, mandible; 



mx, maxilla ; p, palpus ; Ir, labrum. x250 



17 Antenna of larva. x250 



18 Dorsal aspect of abdomen of pupa of variety a. x60 



19 Comb of the lateral fin of the eigbtb segment of pupa. x250 



20 Dorsal aspect of the abdomen of pupa. x60 



21 Comb of lateral fin of eigbtb segment of pupa. x250 



Cricotopus varipes 



22 Ventral aspect of moutb parts of larva: 1, labium; mx, maxilla; 



p, palpus 



PLATE 26 

 Tanytarsus dives 



1 Dorsal aspect of bead of larva : a, antenna ; Ir, labrum. x60 



2 Apical end of mandible of larva. xl50 



3 Respiratory organ of pupa. xGO 



4 A'entral aspect of moutb parts of larva : 1, labium ; mx, maxilla ; p, 



palpus ; imx, inner lobe of maxilla ; by, bypopbarynx. x250 



5 Caudal end of larva. x25 

 Caudal end of pupa. x25 



7 Dorsal aspect of abdominal segments of pupa. x25 



Tanytarsus exiguus 



8 Larva. x20 



Fibrous case of larva and pupa. xG 



11 Dorsal aspect of second abdominal segment of pupa. xlOO 



12 Ventral aspect of moutb parts of larva : 1, labium ; md, mandible ; 



mx, maxilla ; p, palpus. x400 



