494 NEW YORK STATE MUSEUM . 
6 Cross section of hypopharynx. x110 
7 Wing of male. x15 . 
8 Thoracic respiratory filaments of pupa. | pe ha 
PLATE 37 
_ Simulium venustum and varieties 
Maxilla of larva. x110 
Hypopharynx of larva, var. piscicidium. x110 
Labrum of larva, venustum. x110 
Respiratory filaments of pupa. x40 
Labium of larva, var. piscicidium. x190 
Labium of larva, venustum. x190 
Respiratory filaments of pupa, var. piscicidium. x110 
Wing of imago, var. a 
Caudal appendages (blood gills) of larva, var. a. x110 
Hypopharynx of larva, var. a. x110 
Thoracic respiratory filaments of pupa, var. a. x110 
Labrum of larva, var. a. x110 
Mandible of larva, var. a. x110 
Labium of larva, var. a. x190 
SMe ontnanarwh re 
fob RL bk pk pe 
Rwy 
PLATE 38 
gs. x50; claws. x190 
venustum (var. piscicidium). Hind tarsus of male 
venustum (var. piscicidium). Middle tarsus of male 
venustum (var. piscicidium). Fore tarsus of male 
venustum (var.a) Fore tarsus of female 
venustum (var. a) Middle tarsus of female 
venustum (var. a) Hind metatarsus of male 
pecuarum. Hind metatarsus of female 
pictipes. Hind metatarsus of male 
vittatum. Hind metatarsus of female 
hirtipes. Hind metatarsus of female 
hirtipes. Hind metatarsus of male 
meridionale. Male and female metatarsus 
bracteatum. Female metatarsus 
pecuarum. Claw of female 
bracteatum. Claw of female 
meridionale. Claw of female 
pictipes. Male 
meridionale. Male 
venustum, var. piscicidium. Female 
. pictipes. Female 
.ochraceum. Hind metatarsus of female 
BGMHHAaWaIHKwWNEH 
AANRANNANANRAARARADAARRADE 
10 
PLATE 39 
Corethra plumicornis 
1 Dbarva of ©) pl umieorn is aes 
2 Pupa of same. x12 
2a Breathing tube of pupa. x110 
