EXPLANATION OF PLATES 



PLATE 16 



Chironomus sp. 



1 Adult male. x6 



2 Pupa 



3 Head of adult female 



4 Larva (tbe second and third segments coalescent) 



5 Frontal aspect of larval bead 



PLATE 17 



Ceratopogon sens. lat. 



1 Larva. x6 



2 Ilypopharynx of larva. xlOO 



3 Caudal end of larva. xlOO 



4 Ceratopogon sens. str. Larva. xlO 



5 Ceratopogon sens. str. Body segment of larva. x40 



6 Ceratopogon sens. str. Mandible of larva. xl80 



7 Ceratopogon sens. str. Thoracic prolegs of larva. x400 



8 Ceratopogon sens. str. Claw of bind proleg of larva. x400 



9 Ceratopogon sens. str. Dorsal aspect of pupa. xl5 



10 Bezzia sp. Dorsal aspect of labium, maxilla and its palpus 



11 Bezzia sp. Venti'al aspect of pupa 



12 Bezzia sp. Thoracic respiratory organ of pupa. xlOO 



13 Brachypogon wing 



14 Ceratopogon sens, str., wing 



15 Bezzia wing 



16 S p h a e r m V a s wing 



PLATE 18 



Ceratopogon sens. lat. 



1 Dorsal aspect of labrum of larva ; a, antenna ; b, papilla. x400 



2 Dorsal aspect of labium and maxilla of larva ; p. palpus. x400 



3 Lateral aspect of head of larva ; m, mandible ; a, antenna. xlOO 



Bezzia setulosa 



4 Mandible of larva. x4G0 



5 Hypopharynx of larva. x400 



6 Dorsal aspect of labium of larva. x400 



Ceratopogon sens. str. 



7 Foot of imago 



Culicoides sp. 



8 Foot of imago 



Bezzia setulosa 



9 Respiratory organ of pupa. xlOO 



10 Dorsal aspect of pupa. xl5 



11 Ventral aspect of pupa. xl5 



12 Fore femur of imago. x40 



Sphaeromyas argentatus 



13 Fore fifth tarsal joint of female imago. x40 



14 Hind fifth tarsal joint of female imago. x40 



