20 PARASITES OF THE DOMESTIC ANIMALS 



afforded by the seventeen-year cicada. Most of the insect hfe is occupied 

 by the larval stage, during which the greatest growth takes place. With 

 a few exceptions, as honey bees and ants, the period of the adult is short, 

 in some cases a few days or even hours. The life of the adult is de- 

 voted to the activities concerned in reproduction, and the insect usually 

 dies when this is accomplished. 



Of the class Insecta the five following orders contain parasites of 

 medical importance : 



Order I. Diptera — Flies, gnats, and mosquitoes. 



Order II. Siphonaptera — ^Fleas. 



Order III. Siphunculata — Sucking lice. 



Order IV. Mallophaga — Biting lice. 



Order V. Hemiptera — Bedbugs and allies. 



Classification of Parasites of the Class Insecta 



Phylum I. Arthropoda. P. 13. 

 Class A. Insecta. P. 15. 

 Order 1. Diptera. P. 23. 



Family (a) Culicidse. Mosquitoes. P. 24. 

 Genus and Species: 



Culex pungens. Pp. 25, 26. 

 Anopheles quadrimaculatus. P. 26. 

 A. punctipennis. P. 28. 

 Ades calopus. P. 29. 

 Family (b) Simuliidse. Buffalo gnats. P. 31. 

 Genus and Species: 



Simuhum pecuarum. Animals attacked, equines and cattle. 

 P. 32. 

 Family (c) Tabanidse. Horseflies, "gadflies. Animals attacked, 

 equines, cattle. P. 35. 

 Genus and Species : 

 Tabanus atratus. P. 35. 

 T. lineola. P. 36. 

 Family (d) Muscidae. House fly and allies. P. 37. 

 Genus and Species: 



Musca domestica. Injurious to man and domestic animals 



by irritation and contamination. P. 37. 

 Stomoxys calcitrans. Animals attacked, equines and cattle. 



P. 39. 

 Lyperosia irritans. Animals attacked, cattle. P. 41. 

 Glossina palpalis. Animals attacked, man, and domestic 



and wild animals. P. 44. 

 G. morsitans. Animals attacked, same. P. 44. 

 G. longipalpis. Animals attacked, same. P. 44. 



