HOW TO KNOW THE INSECTS 



ae short; not over five segments. Found mostly on 

 ew on mammals, (Bird lice) Fig. 57. 



Order XV, MALLOPHAGA 



Fig. 57. A Bird Louse. Llpeurus heterographus 

 Nltzsch. The Chicken Head Louse. 



Paxe to dark gray. Luch flattened. Feed on 

 skin scales of young chickens and turkeys. Length 

 2-5 mm. (from U.S.D.A. ) 



This order Includes many species, most of which 

 are parasites on birds. There are probably as 

 m.any species as there are species of birds. A fev; 

 species of biting lice live on domestic mammals. 



Aphis maidi-radicis Forbes 



21a Sma 1 1, soft-bodied insects with small heads and plump bodies 

 Two short tubes extending from back of abdomen (a). Found suck- 

 ing juice from plants. Frequently attended by ants. (Plant 

 lice or Aphids) Figs. 58 and 173. Order XVIII, HOMOPTERA p. 83 



Fig. 58. An Aphid. 

 The Corn root Aphid" 



V/hitlsh. Found on roots of corn v/here it is 

 placed and cared for by ants (See Fig. 54). All 

 sumjner long there are nothing but m.any genera- 

 tions of females v/hlch produce living young. At 

 the approach of cold weather males and egg lay- 

 ing females are formed. The ants care for the 

 eggs during the winter and see that the young 

 find .proper food when they hatch in the spring. 

 Figure ss. Length about 2 mji:. (from U.S.D.A.) 



21b Not as in 21a 22 



22a Small, broad and flat across back; fleshy legs, each with 

 single hook like claw for grasping hairs; fleshy, unjcinted, 



sucking beak. Found on mammals. (Suck- 

 ing lice.) Fig. 59. Order XVI, ANOPLURA 



Fig. 59. A Sucking Louse. Kaem.atopinus 

 suis (L.) The liog Louse. 



Grayish bro\im with black markings. 

 Lives by sucking the blood of the hog. 

 Length 4-6 mir^. 



The true lice are confined in their 

 hosts to the mamm:als. Two species prey 

 on man, while cattle, the horse .sheep, 

 dog and several wild mammals each have 

 at least one species. 



46 



