AQUATIC INSECTS IN NEW YORK STATE 493 
Simulium pecuarum 
6 Mandible of larva. x110 
7 Hypopharynx of larva. x110 
8 Labium of larva. x190 
9 Maxilla of larva. x110 
10 Respiratory filaments of pupa. No scale 
11 Labrum of larva. x110 
PLATE 34 
: Simulium hirtipes 
1 Wing of male. x15. C Costa. Sc Subcosta. R Radius. M Media. 
Cu Cubitus. A Anal 
2 Palpus of adult. Female. x40 
3 Maxilla of larva. x110 
4 Labium; of larva. x110 
5 Antenna of larva. x110 
6 Mandible of larva. x110 
7 Ventral view of head of larva. No scale. Ir Labrum. m Mandible. 
ev Maxilla. 1 Labium. /f Fan 
8 One ray of fan of larva. No scale 
9 Larva. 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 Respiratory filaments of pupa. x40 
2 Labium of larva. x190 
3 Mandible of larva. x110 
Simulium sp. 
‘From California, Santa Cruz mountains 
4 Respiratory filaments of pupa. No scale 
5 Pupal case. No scale 
6 Mandible of larva. “x110) 
7 Labium of larva. x190 
From Leland Stanford jr University campus 
8 Labium of larva. x190 
From Las Vegas N. M. 
9 Antenna. x190 
10 Labium. x110 
PLATE 36 
Simulium pictipes 
1 Mandible of larva. x110 
2 Maxilla of larva. x110 
3 Labium of larva. x110 
4 Hypopharynx of larva. x110 
5 Labrum of larva. x110 
