430 
Annals Entomological Society of America [Vol. V, 
DESCRIPTION OF PLATES. 
PEATE SexOGhile 
Figs. 1—9 after drawings by Terzi in Reports to Local Goy. Bd. on Public Health, 
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Sete ores Meth aiia me eh WS) 
Or 
N.S. No. 5. 1909. London. 
Musca domestica Linn., perfect insect. 
Musca domestica Larva. 
Musca domestica Pupa. 
Homalomyia canicularis, Linn., perfect insect. 
Homalomyia canicularis, Larva. 
Homalomyia canicularis Pupa. 
Stomoxys calcitrans Linn., perfect insect. 
Stomoxys calcitrans Larva. 
Stomoxys calcitrans Pupa. 
N. B.—AIl figures are 4 times natural size. 
PLATE XXXIV. 
External mouth parts of Stomoxys calcitrans Linn. 
Median longitudinal section of skeleton of front of head showing antennae,. 
maxillary palpi and proboscis; v, vertex; ant., antenna; ar., arista; 
p., left maxillary palpus; ap., apodeme; pr., proboscis; I, II, III, 
segments of labium; III, showing left labellum. 
Proboscis with labium removed; ap., apodeme; ph., pharynx; sd., salivary 
duct; g., lower part of oesophagus connecting the food canal of proboscis. 
with the pharynx; I, portion of base of labium; lb., labrum; h. p., 
hypopharynx. 
Transverse section of base of proboscis. I outer wall of base of Segment I 
of labium; m. c., muscle cells; lb., section of labrum; h. p., section of 
hypopharynx; fe., food canal formed by labrum and hypopharynx 
combined; s. c., salivary canal of hypopharynx; tr., trachea; k., keel of 
chitin which gives rigidity to the base of labial groove. 
Base of proboscis with labium removed (adapted from Hansen’s fig.); 
m., right muscle of enlargement of salivary duct s. d.; ph., pharynx; 
g., tube leading to pharynx; ap., base of apodeme.; lb., labrum; h. p., 
hypopharynx; b. h. p., base of hypopharynx; k, part of keel; see Fig. 3. 
Inner surface of right labellum; vw., ventral wall; d. m., dorsal margin; 
ct., chitinous teeth; cb., chitinous blades; h., hair-like processes 
(adapted from Hansen’s fig.). 
