Identification Keys 227 



12. Ninth segment with a single lateral hair. An- 



tennae sparsely covered with short spines. 



(Fig. 35, page 176) PsoropJiora hozuardii. 



Ninth segment with a two- or three-branched 

 tuft. Antennae also with short spines. 



PsoropJiora ciliata. 



13. Tuft single, almost at base of breathing tube, 



within the pecten 14 



Tufts many, or, if single, on same side with 

 pecten and over one-quarter up tube 17 



14. Pecten of tube continued by ten to sixteen hair- 



like spines 15 



Pecten of tube without hairlike spines above it. 

 Antennae sigmoid, tuft far up, in notch, a pair 

 of long spines at three-quarters of distance 

 from notch to tip of antennae. Ventral tufts 

 of ninth abdominal segment extending nearly 

 to the anterior end of the segment. 



Culicella dyari. 



15. Tufts D and E four- and five-branched, quite 



large and conspicuous. (Fig. 41, page 238). 



Culiseta consobrimis. 

 Tufts D and E two- or three-branched, small. 16 



16. Comb scales not over forty-six. Not more than 



three tufts in front of barred area. Spines on 

 tip of antenna one-fifth its length. 



Theobaldia incidens. 



Comb scales not less than fifty-five. Three or 



four tufts in front of barred area. The two 



lower spines on tip of antenna one-fourth its 



length Culiseta absobrinus. 



17. Breathing tube with either more than two tufts, 



or with four long single hairs and two small 



tufts 18 



Breathing tube with not more than two tufts. 

 Antennal tuft never in notch 25 



