AN INTRODUCTION TO ENTOMOLOGY. 



J/< -''lliiiutn is one of the species which infest the hen. 



This is often a pest in hen-houses. It is to free themselves from 

 this and allied parasites that hens wallow in dust and scatter it 



>ng their feathers. When fowls are confined so that they cannot 

 dust themselves they are very liable to suffer from bird-lice. 



In order to protect fowls from these pests, cleanliness and the use 

 of proper insecticides are necessary. The house should be thor- 

 oughly cleaned at least twice each year, and the straw in the n 

 burned. Sprinkling powdered sulphur in the nests, and oiling the 

 perches with kerosene, will do much to keep the lice in check. If a 

 house becomes badly infested it should be thoroughly white-washed. 

 and the fowls dusted with Persian insect-powder. Many writers 

 advise the use of kerosene upon infested fowls. 



There is much doubt regarding the zoological position of the Mai lop 

 The placing of them in the Pseudoneuroptera must be regarded as a provi- 

 sional arrangement. They were formerly classed with the true lice, but tlu \ 

 sharply distinguished from them by the structure of their mouth-parts. Both 

 of these groups have become so degraded as the result of their parasitic habits 

 that it will be very difficult if not impossible to definitely determine their 

 places in the insect series. Certain German entomologists class together as 

 an order the Termitidae, Psocidae, and Mallophaga under the name Corrodcntia. 

 But this association does not seem to me natural. 



TABLE OF GENERA OK MALLOPHAGA. 



A. Antennae filiform, three- or five-jointed ; maxillary palpi invisible. 



B. Antenna: three-jointed; tarsi with a single claw. Parasites on m.im- 



;ls. i. TRICHODI 



BB. Antenna: five-jointed ; tarsi with two claws. Parasites on birds. 

 C. With movable appendages (trabiruhei on the head in front of the 

 :ma: ; antenna: nearly alike in both ft 2. DOCOPHORUS. 



CC. Trabiculx absent, or if present not motile. 

 D. Antenna: filiform, without sexual diilerences. 



E. Head rounded behind ; last segment in the male rounded off. 



3. NlRMUS. 

 EE. Head abrupt angled behind: abdominal segments fused in the 



middle. 4. GONIOCO 



DD. Antenna; of male forcipate by a prOGCM from the third segment. 

 E. Head angled behind ; terminal segments of female tubercle-like, of 

 male rounded off. 5. GoNlODES. 



EE. Head rounded behind ; terminal segment of male notched. 



6. LlPKURUS. 



