THE MOSQUITOES OF THE SOUTHEASTERN STATES 



73 



DEINOCEEITES 



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- 

 ida. One species D. cancer 



Eighth abdominal segment with comb scales ; mouth brushes cilif orm 



Figure 23. — Types of air 

 segments of abdomen) ; 



tubes: A, PsoropJiora ferox (also showing terminal 

 B, Mansonia perturbans; C, Theotaldia inornata. 



MEGAEHINUS 



Eighth abdominal segment without comb scales but with 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, 0). [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 



9. Anal segment with usual median ventral brush, consisting of a close-set 



row of tufts ; air tube with one pair of hair tufts, attached before 



middle, each with several long hairs. [Comb with one row of short 



scales and a second row of very long, pointed scales ; antenna with a 



