The Sheep Blow-Fly in South Africa. 



451 



.'-5. 



5. 



Fig. 1. — Pycnosama c/ildrdpi/i/a, Wicd. Diagram of maggot or larva. Enlarged. 

 (/, Mandibles or great hooks, h, Anterior spiracles, r, Position of area on 

 which posterior stigmata are situated, y/, Bands of spines. 



Fig. 2. — I'yi->io.soiiuc cMnnipyga, Wied. Diagram of right posterior spiracle of 

 maggot. Much enlarged, y^, Peritrenie. .y, Slits. 



Fig. 3. — Pycnosoma alhicepx, Wied. Diagram of right posterior spiracle of maggot. 

 Much enlarged, p. Peritrenie. -v, Slits. 



¥\Ct. \.-- 3Ii(sca doniestioa. L., the common house-tly. Diagram of right posterior 

 spiracle of maggot. Much enlarged. ^>», Peritrenie. .?, Slits. J, "Button." 



Fig. 5. — Lucilia serlcata, Meig. Diagram of posterior aspect of maggot, showing 

 area on which posterior stigmata are situated. Enlarged, d, Stigmata. 



Fi(i. 6. — Pycnosoma c/i/oropygii, Wied. Diagram of lateral aspect of cephalo- 

 ))haryngeal skeleton of maggot. Much enlarged. ///, Mandible or great hook. 

 /, Inner portion to which musculature is attached. 



N.B. — It should be noted that this apparatus is double, there being two 

 hooks, etc. 



