1942. Two of the cases now on exhibition show the principal types 

 of moths and butterflies of North America, and two additional cases 

 of the same groups exhibit representative types from other parts of 

 the world. These cases contain some of the most beautiful of insects, 

 and fill the long-felt need for an exhibit of moths and butterflies. 



Fig. 16. "Boa constrictor" is often used 

 merely to refer to any gigantic snake, 

 but the true boa constrictor of tropical 

 America is by no means as gigantic as 

 the South American anaconda or some 

 Oriental pythons. This model of a 

 South American boa constrictor, placed 

 on exhibition in 1943, was made from 

 an exceptionally fine specimen, about 

 ten feet in length, received from the Lin- 

 coln Park Zoo. The boa forms an excel- 

 lent counterpart to the East Indian 

 python in the same hall I Hall 18). 



Formerly inquiries for them from school groups and amateur natu- 

 ralists made great inroads on the time of the Division of Insects, 

 as such inquiries hitherto could only be referred to the reference 

 collection. 



Exhibition work in progress includes a number of major projects, 

 most important of which is perhaps the making of a series of scale 

 models of whales and life-size models of porpoises (see Fig. 15) for a 

 Hall of Whales, to adjoin the Hall of Marine Mammals. The models 

 are the work of Staff Taxidermist C. J. Albrecht. Staff Taxidermist 

 Julius Friesser has been engaged mainly on the accessories for a 

 habitat group of the African forest hog. Mr. Walters has made 



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