78 DIPTERA. 



about one hundred and twenty in number, laid in horse 

 manure. Larv-x become full grown in from five to 

 seven days, having moulted twice. Pupa state lasts 

 from five to seven days. Adult insects are common 

 during the warm parts of the year, and hybernate 

 through the winter. 



The Flesh-fly, Sarcophaga caniaria Linn. — Female 

 viviparous, Larva; feed upon carion, and are occasion- 

 ally found in wounds and sores of man and cattle. It 

 is said that sometimes a single female of this species 

 contains 20,000 eggs. See Am. Nat. Vol. VIL, p. 193 

 for figures of larva, puparium and adult. 



The Cheese Maggot, Piopliila casei Linn. — Larva;, 

 called "skippers" or "Cheese maggots," live in 

 cheese, bacon, and other fatty substances. Note man- 

 ner of leaping. (5, IL, 78). 



Tachina. The species of this genus resemble the 

 Ichneumonid.E in habits, being parasitic in the larvs 

 of other insects. (21,53). 



HiPPOBOSClD/E {The Forest-flics and Sheep Ticks.) 



Note pecular mode of development. Examine 

 specimens. 



