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PLATE 48 
Dixa modesta n. sp. 
Ventral surface of larval head. x50. 27 Labrum. a Antenna. mz Max- 
illa with its palpus 
Mandible of the larva. x190 
Maxilla and its palpus, p. x115 
Pupa. x15 
Larva, ventral view. x15. a Ventral caudal lobe. 6b Ventral foot 
bristles. c Abdominal prolegs 
Dorsal view of the dorsal head sclerite. x60 
Dorsal view of the caudal appendages of the larva. x40. p . oe 
angular chitinized plate.’ s Spiracles 
Wing of the imago. x15. Se Subcosta. R Radius. M Media. Cu 
Cubitus. A Anal 
Diamesa waltlii Meigen 
Ventral view of the labrum of the larva. x190. j Jointed appendages. 
e Epipharynx 
Ventral view of the labium of the larva. x190 
Larval antenna. x190 
Larval mandible. x190 
Papas xJi2 
: PLATE 49 
Chironomus gp. 
Hypopharynx of the larva. x110 
Antenna of the larva. x190 
Ventral aspect of the upper lip, showing the epipharynx. x110 
Head and thorax of larva, showing the thoracic proleg. x15 
Ventral aspect of the head. mn Mandible. mx Maxillae. 7 Labium. 
x50 ; 
Mandible. x110 
Caudal end of larva, with its anal prolegs. x15 
Frontal aspect of the larval head. x50. Ir Labrum. m Mandible. 
a Antenna. J Labium 
Dorsal aspect of the larval maxilla. x190 
Ventral aspect of seventh, eighth and ninth abdominal segments of 
pupa 
Genitalia of the male. x50 
Pupa 
PLATE 50 
‘Thalassomyia obscura 0. sp. 
Antenna of the larva. x190 
Ventral aspect of the larval mandible. x190 
Ventral aspect of the upper lip (labrum). x190. e Epipharynx 
Dorsal aspect of the head. x50 
Dorsal aspect of the larval hypopharynx. x190 
Ventral aspect of the larval maxilla. x190 
Armature of the thoracic prolegs. x400 
Labium of the larva. x190 
A claw from the anal prolegs of the larva. x400 
Pupa 
Armature of the abdominal segments of the pupa 
