April, '13] MORRILL: ENTOMOLC'GICAL PIONEERING 195 



which were suitable for use against ants. The results were disappoint- 

 ing and perplexing, no relation being shown between the amount of 

 arsenic present and the results secured by field tests. Whether a 

 mechanical basis can be discovered for the object mentioned remains 

 to be determined. 



Leaf cutting bees are the cause of much damage to young fruit 

 trees in southern and eastern Arizona. In the Salt River Valley 

 roses appear to be the only plant subject to injury. Specimens of 

 the species concerned have not been captured by rnyself or by my 

 correspondents with the exception of a single specimen which reached 

 me in a broken condition. 



Entomology and the Arizona Public. The foregoing records 

 which purport to be merely a general characterization of the economic 

 insect fauna of Arizona indicate the extent of the field now open for 

 work in that state. While we are still fortunately free, as far as known, 

 from many of the most destructive ineect pests of the country, there 

 is no scarcity of native insects with predilections for cultivated crops. 



The need for entomological protection and entomological investi- 

 gations is being more and more generally recognized in the state. 

 In 1909 the first appropriation of $3,000 per annum for entomolog- 

 ical work was made in the territorial assembly after a hard fight 

 for recognition by the interests most concerned. In 1912, with urgent 

 necessity for economy in all appropriations, the state legislature by a 

 unanimous vote in both houses passed a bill amending the original 

 law and adding S9,000 a year to the original amount. The outlook 

 for future accomplishment in economic entomology in Arizona is 

 most promising and the continued favorable attitude of the public 

 is hopefully anticipated. 



President W. D. Hunter: Two of the most striking entomolog- 

 ical observations made on a recent trip in the arid southwest dealt 

 with the house fly and mosquitoes. One would not naturally expect 

 to find an abundance of these insects in such a region. Artificial 

 circumstances tend to overcome natural obstacles in the breeding 

 of these insects. The water used for irrigation allows the mosquitoes 

 to breed in great numbers and carelessness about the disposal of 

 garbage allows great numbers of house flies to be bred. 



We will now hsten to a paper by Mr. S. J. Hunter on "Apparatus 

 for Maintenance of Thermal Climatic Conditions." 



