I2S 



Fig. 141. 

 (a) larva : (6) adult. 



Blood-sucking cone nose. 



Enlarged. (Fi'om U.S. Dept. Agric.) 



several forms predaceous on other insects. The blood- 

 sucking cone nose feeds generally on other insects, 

 but the winged adult sometimes flies into houses at night, 

 and if opportunity offers attacks sleeping persons. The 

 si long sucking mouth parts with which the insect punctures 

 the skin of its host for the purpose of sucking blood is capa- 

 ble of inflicting a very painful wound. Cases are known of 

 fever and severe illness, accompanied by swelling and in- 

 flammation in the vicinity of the bite, following the attack of 

 the blood-sucking cone nose. The insect is about f-inch in 

 length, of the typical appearance of the Hemiptera, the 

 wings lying along the back, being narrower than the ab- 

 domen, the edges of which are marked with alternating 

 areas of red and black, which latter is the general ground 

 colour of the entire insect. 



THE HOUSE fly (Musca domestica). Diptera. 



The housefly (Fig. 142) is probably to be considered 

 .is much a household pest, as a pest attacking man. Within 

 the past few years, however, the agency of this insect as a 

 carrier of typhoid fever lias come to be so well known that 

 it is included in this place rather than among the household 

 pests. 



