AQUATIC INSECTS IN NEW YORK STATE 493 



Simulium pecuarum 



6 Mandible of larva. xllO 



7 Hypopbarynx of larva. xllO 



8 Labium of lai-va. xl90 



9 Maxilla of lai-va. xllO 



10 Respiratory filaments of pupa. No scale 



11 Labrum of larva. xllO 



PLATE 34 



Simulium hirtipes 



1 Wing of male. xl5. G Costa. Sc Subcosta. B Radius. M Media. 



Cu Cubitus. A Anal 



2 Palpus of adult. Female. x40 



3 Maxilla of larva. xllO 



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. 



m Miaxilla. I Labium, f Pan 



8 One ray of fan of larva. No scale 



9 Larva. s6 



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 Respiratory filaments of pupa. x40 



2 Labium, of larva. xl90 



3 Mandible of larva. xllO 



Simulium sp. 

 From California, Santa Cruz mountains 



4 Respiratory filaments of pupa. No scale 



5 Pupal case. No scale 



6 Mandible of larva. sllO 



7 Labium of lai-va. xl90 



From Leland Stanford jr University campus 



8 Labium of larva. xl90 



From Las Vegas N. M. 



9 Antenna. xl90 

 10 Labium. xllO 



PLATE 3C 



Simulium pictipes 



1 Mandible of larva. xllO' 



2 Maxilla of larva. xllO 



3 Labium of larva. xllO 



4 Hypopharynx of larva. xllO 



5 Labrum of larva. xllO 



