26 INSECT PARASITES. 



This is a very abundant and widely distributed 

 species in most breeds of fowl. It lives amongst the 



Fig. 6. 



Upturns variabilis. 



barbs of the primary and secondary wing-feathers, 

 amongst which they remain stationary, but can move 

 with great rapidity if they choose. 



(5) Lipeurus heterographus. — Very similar to the 

 former in colour, but smaller in size, and the head is 

 parabolic, not rounded as in variabilis. The abdomen 

 is also more oval ; in the female there are six bristles 

 springing from tubercles on each segment ; there are 

 also median brown spots on each segment, bordered 

 with large hairs. Length in $ , 2 mm. ; in J , 

 1*8 mm. 



This species is not nearly so abundant as the 

 preceding. It lives in exactly the same manner. 



