106 



AUSTRALIAN LADYBIRD. 



Nomus ( Vedalia) cardinalis Muls. 



(Principal enemy of the fluted scale llcerj/a purchcm]. ) 



Enlai>re<l model of the adult of this insect, the introduction of which from Australia 

 has effected w liat was impossible by any other means — the practical annihilation of 

 tlie fluted scale in California. 



Enlarged models showing structure and characteristic appearance of the larva and 

 and pupa. 



THE "KISSING BUG." 



Eeduvius personatus Linn. 



Enlarged model of one of the group of true bugs, generally known as "assassin 

 bugs," which of late years have acquired a certain newspaper notoriety through their 

 supposed preference for the human lips. 



They feed on other insects, which they pierce with their strong beaks; some species 

 are frequently fonnd in hou,ses, attracted by light, and they may, if they believe them- 

 selves in danger, accidentally or in defense, pierce the human skin with their beaks, 

 causing a jjainful wound, and often blood poisoning through the introduction of the 

 germs of putrefaction. 



ORANGE RUST-MITE. 



Eriopliyes [Phytoplus) oleicorus Ashm. 

 Wax models of oranges showing work of the orange rust-mite. 



ENLARGED MODELS OF THE PARASITE CAUSING MALARIA 

 r^STIVO-AUTUMNAL FEVER). 



Plasmodmm nudnruc. 



Twenty-nine enlarged models, illustrating the life history of this parasite in the 

 blood of man and in the mosquito {Anopheles). 



The models ex!iil)ited show: Development of spores in the blood of man; develop- 

 ment of " crescent" in the blood of man; development of "gamete" in stomach of 

 mosipiito; development and fertilization of "zygote" in stomach of mosquito; devel- 

 opment of "zygote" in stomach wall of mosquito; "zygote" filled with "blasts" 

 and ready to burst; free endospores, free blasts, and spermatozoa. 



PHOTOGRAPHS OF INSECT DAMAGE TO FORESTS. 



Western yellow pine trees killed by the pine-destroying beetle. Black Hills, 

 South Dakota. 



Section of shortleaf pine tree killed by the destructive pine bark-beetle. North 

 ("urolina. 



Trunk of western yellow pine killed by the Arizona Dendroctonus, showing work 

 of beetles. New Mexico. 



Western yellow pine tree, showing injury caused by the dark-red turpentine beetle 

 at base. New Mexico. 



Monterey pine tree, showing injury of the dark-red turpentine beetle at base. 

 California. 



Western hemlock trees killed in 1892 by the hemlock span-worm. State of 

 Washington. 



Trunk of hickory tree killed by the hickory bark-beetle, showing growth of white 

 fungus following attack. Detroit, Mich. 



Silver pine trees killed by the mountain-pine Dendroctonus. Priest River Forest 

 Reserve, Idaho. (2.) 



Bark from trunk of giant arborvita^ showing mines of the cedar bark-beetle. State 

 of Washington. 



Log of Douglas spruce, showing galleries of the Douglas spruce Dendroctonus. 

 State f)f Washington. 



Storm-felled Douglas spruce offering favorable conditions for the propagation of 

 the Douglas spruce Dendroctonus and other bark-bettles. State of Washington. 



