44 



(Fig. 14.) 

 Female; natural size iiulieatod by side line. — Circular Ko. 2S, V. 8. Depurtmcnt nj 



AuriciiUnrc. 



(Fid. 1.-..) 

 (0) Second sta.^o of larva from baek : ( (/ and ct onlar^'ement of extremities: (d) 

 ventral view of third stage. With details of extremities at (c) and (/ ) ; (f/i 

 dorsal view of mature larva, with enlargement of analspiracles at li ; I i i the same, 

 lateral view; natural size indicated i).v side lines. — Frovi "Insert Life,'' Circulur 

 2i), U. *'. Dcptntmcnt 0/ Agriculture. 



Ox-\Yarble, Ox Bot-Fly, G ad-Fly (llijpodcniia horis). 



The eggs are usually laid dui-ing the months of June, July ami August. 



The female fly, vs'hich is provided with a very strong ovipositor, selects, if 



possible, a young beast, and, alighting on the baclc near the spine, manages 



to pierce the sldn and deposit a single oval egg in the hole. This operation 



