Identification Keys 209 



34. Basal clasp segments of male with conical tuber- 



culate processes thickly set with many stout 

 hairs. Female with reddish-brown stripe bor- 

 dered with silvery stripes in the centre of the 

 mesonotum OcJilerotatus fitcliii, Felt. 



Basal clasp segments with no such structure. 

 Thoracic stripe, if present, faintly brown, a 

 faint silvery line on either side of middle of 



mesonotum Ochlcrotatus abfitchii, Felt, 



and OcJilerotattis subcantans, Felt. 



35. First tarsal Joint with narrow basal band, hardly 



covering one-fourth of the joint. No silvery 

 lines on thorax 36 



First tarsal joint with white basal band covering 

 fully one-third of joint. A faint silvery line 

 each side of centre of mesonotum, curving 

 down sides to pleurae. 1 



Ochlerotatus abfitchii, Felt, 

 and Ochlcrotatus siibcantans, Felt. 



36. Seventh abdominal segment chiefly yellow- 



scaled Ochlcrotatus cautator, Coquillett. 



Seventh abdominal segment chiefly black-scaled. 

 Ochlerotatus sylvestris, Theobald. 



37. Wings distinctly spotted. Palpi about as long 



as proboscis in both sexes 38 



Wings not distinctly spotted 41 



38. With usually four, sometimes five or three, black 



spots on each wing. 



Anopheles maculipennis, Meigen. 

 With more than five black spots on each wing. .39 



1 The thorax in these two species often lacks a median band, so 

 they are inserted in two places in the key. 



