38 



the localities in which each species is to be found. In addition"to 

 the living plants, the work includes a list of 213 species of fossils, 

 mostly of Cretaceous age, which have been unearthed on Long 

 Island. Following this, a section is devoted to the insect galls 

 of the region, of which 95 are included. An extensive bibliog- 

 raphy of works dealing with the flora of Long Island and vicinity 

 completes this very comprehensive guide. 



Alexander F. Skutch 



PROCEEDINGS OF THE CLUB 



Meeting of December 8, 1925 



This meeting was held at the American Museum of Natural 

 History. The following were elected to membership in the Club: 



Mr. Frank W. Johnson, 1362 Amherst Street, Buffalo, N. Y. 



Miss Katherine W. Browne, Barnard College, New York City. 



Professor Richards addressed the Club on "Some features of 

 the desert vegetation of Southern Arizona. 



A series of lantern slides, illustrating the region around Tucson, 

 were shown with running comment by the speaker. 



Geographically there are in this region the mountain ranges 

 running up sometimes to as much as 9,000 feet, the bajadas or 

 foothills, and the mesa-like slopes which fall off gradually to the 

 flood plains of the water courses. 



There are two rainy seasons in this part of Arizona, together 

 averaging 10-12 inches: the winter rains, which are light, be- 

 ginning in the middle of November and lasting until the end of 

 March; the summer rains consisting of few storms, often of great 

 violence, lasting through July and early August. 



Three vegetational regions may be considered, corresponding 

 in a general way to the geographical features. 



I. The montane region, where the flora is not xerophytic in the 

 strictest sense, for the precipitation is relatively greater here 

 than at lower altitudes. At the higher elevations, species of 

 pine, juniper, live oaks and other arboreal forms are charac- 

 teristic. 



1. The flood plain region, with its cottonwoods and mesquite, 

 is even less typically xerophytic, since the level of the ground 

 water is here well within the reach of the roots of such forms. 



