Identification Keys 225 



3. Lateral tufts on abdominal segments four to 



seven, four- to five-branched, about as long as 

 the segment. Hair nearest meson of dorsum in 

 the first thoracic row three- or four-branched, 



not split to base Anopheles franciscamis. 



Lateral tuft two- to four-branched on abdominal 

 segments four and five (four-branched only on 

 the fourth segment of A. maculipennis) 4 



4. Hair nearest meson of dorsum in first thoracic 



row bifid to base. Shoulder tuft small, un- 

 branched. Spinules on large teeth of comb not 

 extending farther up than the level of the tops 

 of the secondary teeth. Anopheles punctipennis. 

 Hair nearest meson of dorsum in first thoracic 

 row not split, or split less than half way. 

 Spinules extending to top of large teeth on 

 comb 5 



5. Shoulder tuft very large, hairs long. Two or 



three long single hairs in row I, ventral aspect. 

 Antennal tuft below middle. Lateral tuft on 

 fourth abdominal segment, two- or three- 

 branched. HairX 1 simple. Anopheles crucians. 

 Shoulder tuft moderate. Four or more long 

 single hairs in row 1, ventral aspect. Antennal 

 tuft at middle, its hairs reach to tip of antenna. 

 Lateral tuft on fourth abdominal segment 

 four-haired. Hair X four-branched. (Fig. 25, 

 page 126.) Anopheles maculipennis. 



6. Pecten present on the tube 9 



Pecten not present on the tube 7 



Long thoracic tufts represented by stout spines 



covered with spinules. Comb of eighth segment 

 replaced by a patch of chitin. Tuft of tube 

 situated near its base. Antennse smooth and 

 with two bristles caudad of tuft. 



Alegar hinus septentrionalis. 

 Long thoracic tufts present, comb also present. 8 



1 Hair X is the one nearest meson of dorsum in the first row on 

 the thorax. 



