Normally the larvae hatch out in from six to twenty hours, 

 and the whole life-cycle can be completed in about twelve 

 days. These mosquitoes can live for six or eight weeks ; 

 and readily entering ships, they may spread the disease 

 from port to port. 



Name four Examples of Malaria-carrying Mosquitoes. 



Anopheles maculipennis (The Spotted Gnat). The chief 

 carrier of malaria in Europe and North America. 



Pyretophorus costalis. The commonest West African 

 ANOPHELPNES Anopheline. It is also a carrier of the larvae of 



Filaria bancrofti. 



Nyssorhynchus fuliginosus. India. 



Cellia argyrotarsis. South America. It is also a car" 

 rier of the larvae of Filaria bancrofti. 



Give a short Description of the Mouth-parts of Stomoxya 



and of Glossina ( Tsetse- fly). 



In the biting Muscidae the mandibles and 1st maxillae 

 (excepting the maxillary palps) are absent ; and the labium 

 (or 2nd maxillae) is greatly modified to form a hard piercing 



K. Kye. 



A. Antennae. 



L. Labium or Lower Lip. 



Lb. Labellae. 



B. Bulb. 



H. Hypopharynx. 



L-ep. Labrum-epipharynx. 



1'. Maxillary palps. 



FIG. 30.- Side View of Head and Mouth-parts of a Tsetse-fly 



( Glossina). 



proboscis, which makes the wound and which consists of 

 the rostrum (a protrusible part of the head containing the 

 buccal cavity and pharynx), the haustellum or food channel 

 and the labella. 



