128 



Parasitic Arthropoda 



94. Dermatophilus penetrans, gravid female. After Moniez. 



pests may attack a single individual (fig. 95). Here they lie with the 

 apex of the abdomen blocking the opening. According to PuUe- 



born (1908) they do not 

 penetrate beneath the 

 epidermis. The eggs are 

 not laid in the flesh of 

 the victim, as is some- 

 times stated, but are 

 expelled through this 

 opening. The female 

 then dies, withers and 

 falls away or is expelled 

 by ulceration. Accord- 

 ing to Brumpt, she first 

 quits the skin and then, 

 falling to the ground, 

 deposits her eggs. The 

 subsequent develop- 

 ment in so far as known, 

 is like that of other fleas. 

 The chigoe usually 

 enters between the toes, 

 the skin about the roots 

 of the nails, or the soles 



95. 



Chiggers in the sole of foot of man. Manson's 

 Tropical Diseases. Permission of Cassell and Co. 



