248 



THE MOSQUITOES. 



The important ones from a medical stand-point are the Anophelin 33 

 and Culicinae. 



i. Scales on head only; 

 hairs on thorax and 

 abdomen. 



2. Scales on head and 

 thorax (narrow curved 

 scales.) Abdomen with 

 hairs. 



Anophelinae. 



1. Scales on wings, large and lanceolate. Ano- 

 pheles. 



2. Wing scales small and narrow and lanceolate. 

 Myzomyia. 



3. Large inflated wing scales. Cyclolcppteron. 



i. Wing scales small and lanceolate. Pyretophorus. 



i. Abdominal scales only on ventral surface. 

 Thoracic scales like hairs. M yzorhynchus . 



3. Scales on head and 

 thorax and abdomen. 

 Palpi covered with 

 thick scales. 



2. Abdominal scales narrow, curved or spindle- 

 shaped. Abdominal scales as tufts and dorsal 

 patches. Nyssorhynchus. 



3. Abdomen almost completely covered with scales 

 and also having lateral tufts. Cellia. 



4. Abdomen completely scaled. Aldrichia. 



NOTE. Of the above genera only Cycloleppteron and Aldrichia are unproven 

 malarial transmitters. 



The Megarhininae are of no importance medically. 

 The genus Megarhinus has the following characteristics : 



1. Large mosquitoes with brilliant metallic coloring. (Ele- 

 phant mosquitoes.) 



2. Long, curved proboscis. 



3. Caudal tufts of hairs on each side of abdomen. 



The JEd'msd are not known to play any role in transmission of 

 diseases. This subfamily is characterized by having the maxillary 

 palpi much shorter in both males and females than the proboscis. 



One genus Sabethes is very characteristic, owing to dense paddle- 

 like scale structures on two or more legs. 



