PEDICULOSIS 483 



The larvas hatch in a few hours, and are about three-quarters 



of an inch long, with twelve segments carrying circles of 



spirally arranged spines giving a screw-like appearance. 



These burrow into and devour mucous membrane, muscle, 



cartilage, periosteum, bone, and may even reach the brain and 



cause death. 



Neglected, the patients die; treated, they live. 



Injections of chloroform, carbolic acid, turpentine, &c., are 



necessary. 



The frontal sinuses, antrum, and other bony cavities may 



require opening up. 



(4) Auchmeromyia luteola. 



A keen blood-sucker, the Congo Floor Maggot, common in 

 Africa. 



The larva has eleven segments, at the posterior end of each are 

 three short limbs provided with spines directed backwards; 

 laterally each segment bears two or more protuberances with a 

 small spine. The anterior segment bears the mouth and two 

 black hooks, each surrounded by minute teeth. After feeding, 

 the semitransparent body appears red to about the fifth seg- 

 ment as a result of the blood taken. The adult fly corresponds 

 in colour Avith the smoke-stained straw of native houses ; it rests 

 under the roof ; is silent ; lays its eggs in the cracks of the mud 

 floors, under native mats, and in soft moist earth. 

 They feed at night. Those sleeping on beds and raised plat- 

 forms escape as a rule. 



NODULAR LIPOMATOSIS. 



Innocent fatty, subcutaneous nodules, felt under the skin, which 

 may at time be mistaken for enlarged lymphatic glands. 

 No treatment is necessary. 



PEDICULOSIS. 



A condition, exceedingly common in the Tropics, resulting from 

 the bites of Pediculus humanis, P. corporis and Phthirius pubis. 



The latter is less common among races that constantly shave the 

 pubic region. 



PATHOLOGY. 



The mouth parts of the parasite consist of a double tube, one inside 

 the other. The outer chitinous tube or proboscis is a fused labrum 

 and labium armed with minute curved booklets. 



The inner membranous or suctorial tube consists of maxilla and 

 mandibles. 



