MOSQUITO BIOLOGY 



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Fig. lxviii. Larva of spotted-legged mosquito. Psorophora columbiae D. & 

 K. (After John B. Smith.) 1, larva; 2, antenna; 3, maxilla; 4, mandible; 5, 

 mouth brush; 6, mentum; 7, anal segments and siphon; 8, siphonal spines 

 showing variation; 9, a single scale from eighth abdominal segment (all en- 

 larged). 



