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Figure 23.—Types of air tubes: 
THE MOSQUITOES OF THE SOUTHEASTERN STATES 
ee 
A, Psorophora feroz (also showing terminal 
segments of abdomen); B, Mansonia perturbans; C, Theobaldia inornata. 
7. Head normal, without lateral pouches; anal gills four; air tubes short 
ANGEStOUM GE NeINOSt: SUCCIOS ten ee nae ea ee ea es Aedes 
DEINOCERITES 
Head with a prominent triangular pouch on each side (fig. 25, B); 
only two, very short, anal gills; air tube about 4:1. [Lower head 
hairs Single or double, much longer than upper head hairs; comb of 
eighth segment of many scales in a patch; tuft of air tube usually 
double or triple; anal Segment with divided dorsal and ventral 
sclerotic plates.] Breeds in crab holes along coast of southern Flor- 
Tee ATIC AC MCCIOS oe os Se ee Bo Se eee eee ee DE CANCE 
8. Eighth abdominal segment with comb scales: mouth brushes ciliform____ 
MEGARHINUS 
HKighth abdominal segment without comb scales but witb a lateral plate 
bearing two stout spinulose hairs on posterior margin ; mouth brushes 
consisting of about 10 stout, closely appressed, prehensile, curved rods 
(fig. 25, C). [Air tube short, a single pair of ventral tufts near base; 
anal segment ringed by plate; anal gills very short.] Very large pre- 
dacious larvae, occurring in tree holes. The two United States species 
are Separated on male characters_________________ M. septentrionalis 
M. rutilus 
79 
43 
