174 THE H^EMATOPINUS 



Ixodes of Iguana. 



The first of these is Ixodes, an external 

 parasite on the lizard Iguana. 



The illustration (Fig. 54) is from a photo- 

 micrograph of 30 diameters ; the focal distance 

 was 30 inches ; and the objective used was the 

 1-inch. 



The Hsematopinus. 



This creature is the parasite of the buffalo, 

 and it belongs to the sub-order Parasitica. 



It is devoid of wings, and dwells on the 

 skin of the buffalo, sucking its blood. 



The proboscis is fleshy and unjointed ; there 

 are two simple eyes ; the antennae have five 

 joints; the legs arise from the edge of the 

 pro-thorax, and they terminate in a hooked 

 claw. This forms an admirable apparatus for 

 clinging on to the hairs of their hosts. The 

 young do not undergo any metamorphosis. 



The illustration (Fig. 55) is from a photo- 

 micrograph of 40 diameters; the time of ex- 

 posure to gaslight was two minutes; the focal 



