Carpenter et al. : Mosquitoes of Southern U. S. 



129 



ments I to VI. Comb of eighth segment of about 9 to 15 thorn-shaped scales 

 in a single irregular row; individual scale elongate, pointed, fringed on basal 

 half with short spinules. Subsiphonal hair long, 2-branched, barbed. Siphon 

 short, sharply conical, strongly attenuated beyond middle; pecten absent, atten- 

 uated portion of siphon heavily sclerotized, bearing saw-like projections dorsal- 

 ly and stout hooks apically; arising before the heavily sclerotized portion of 

 the siphon are a long stout recurved dorsal spine, a single stout dorso-lateral 

 hair, and a multiple subventral tuft. Dorsal plate one and one-half to two 

 times as long as broad and completely ringing the anal segment; lateral hair 

 multiple, inserted well before the posterior margin of dorsal plate; dorsal brush 

 consisting of a multiple lower caudal tuft and a shorter multiple upper caudal 

 tuft on either side; ventral brush well developed, usually restricted to the barred 

 area, but often with one or two very small precratal tufts piercing the dorsal 

 plate; gills 4, shorter than the segment, bluntly pointed. 



Fig. 66. Larva of Mansonia periurbans (Walker). A, Terminal 

 segments. B, Comb scale. C, Head. 



