AQUATIC INSECTS IN NEW YORK STATE 493 i 



i 

 Simulium pecuarum I 



6 Mandible of larva. xllO j 



7 Hypopharynx of larva. xllO I 



8 Labium of larva. xl90 



9 Maxilla of larva. xllO | 



10 Respiratorj" filaments of pupa. No scale | 



11 Labrum of larva. xllO ; 



PLATE 34 I 



Simulium hirtipes 



1 Wing of male. xl5. C Costa. Sc Subcosta. R Radius. M Media, 



Cti Cubitus. A Anal 



2 Palpus of adult. Female. x40 j 



3 Maxilla of larva. xllO i 



4 Labiumi of larva. xllO ; 



5 Antenna of larva. xllO ! 



6 Mandible of larva. xllO , 



7 Ventral view of head of larva. No scale. Ir Labrum. m Mandible. 



X Maxilla. I Labium, f Pan ' 



8 One ray of fan of larva. No scale 



9 Lai'va. x6 



10 Pupa. x6 



11 Ventral view of caudal disk. x6 



12 One of the radial rows, of hooks of caudal disk. No scale 



13 Pupal respiratory filaments. No scale 



PLATE 35 



Simulium. vittatum. 



1 Respiratoi-y filaments of pupa. x40 



2 Labium of larva. xl90 ' 



3 Mandible of larva. xllO i 



Simulium sp. ! 



From California, Santa Cruz mountains i 



4 Respiratory filaments of pupa. NO' scale ; 



5 Pupal case. No scale 



6 Mandible of larva. xllO i 



7 Labium of larva. xl90 ' 



From Leland Stanford jr University campus ] 



8 Labium of larva. xlOO j 



From Las Vegas N. M. j 



9 Antenna. xl90 I 



10 Labium. xllO ' 



PLATE 3C ' j 



Simulium pictipes • j 



1 Mandible of lai-va. xllO 



2 Maxilla of larva. xllO | 



3 Labium of larva. xllO 



4 Hypopharynx of lai'va. xllO 



5 Labrum of larva. xllO ... ' 



