204 Mosquitoes 



stripe throws our specimen in the first part of couplet 

 5, which refers us to couplet 6; here the agreement 

 is with the first paragraph, correctly referring our 

 specimen to Odilerotatiis sollicitans, Walker. 



This method may seem a little tiresome at first, 

 but with some practice it becomes comparatively 

 easy, and the time and labour saved are considerable 

 as compared to the tedious plan of reading the de- 

 scriptions of the many species — all of which are not 

 often accessible — and comparing the specimen with 

 each one of them. 



Key to the Adults 



i. Proboscis with a median light-coloured band; 



tarsi also with whitish bands 2 



Proboscisdevoid of such a band, tarsi variable io 



2. Each joint of the tarsi basally and apically 



banded with white. 



Culex tarsalis, Coquillett. 



Each joint of the tarsi not basally and apically 



banded with white 3 



3. With more than one dark spot on each wing. .4 

 With one spot or no spots on wings 5 



4. Spots on wings confined to the front margins. 



Grabhamia signipeiuiis, Coquillett. 

 Spots distributed over the wings. 



Grabhamia discolor, Coquillett. 



5. Abdomen with a median, light-coloured stripe 



spreading into a basal band on each seg- 

 ment 6 



Abdomen with no median, light-colored stripe. 7 



