Vol. XXviii] ENTOMOLOGICAL NEWS 169 



5<J. A. vittaticollis Rand. 



"One specimen taken by F. W. Nunenmacher in Josephine 

 County, Oregon, May 8, 1910, and two by myself at Carrville, 

 Trinity County, California, July i, 1913, on willow." Dr. Van 

 Dyke. 



fiO. A. walsinghami Cr. 



Type locality, Yreka, California. Others have been taken 

 in same region ; also in Inyo County, California. It breeds in 

 one of the desert shrubs. 



01. A. nevadensis Horn. 



Western Nevada type locality. There are in the Van Dyke 

 collection specimens from the Yosemite Valley taken on pop- 

 lar. It may possibly extend farther north. 



Notes on some recent studies of Dragonfly Wing 

 Tracheation (Odon.). 



By J. G. NEEDHAM, Cornell University, Ithaca, New York. 



It was a fortunate day for the progress of our knowledge 

 of the Odonata when R. J. Tillyard began his observations on 

 the dragonflies of Australia. Previously many interesting spe- 

 cies had been described from that country, but they were all 

 known merely as museum specimens and known only from 

 bare systematic descriptions drawn mainly by writers in other 

 lands. It is fortunate when the fauna of any land is studied 

 on its own soil ; but in the case of Australia it is especially for- 

 tunate because of the large number of archaic types there oc- 

 curring, concerning which a more intimate knowledge has long 

 been desirable. 



Such knowledge has been furnished by Tillyard in a large 

 measure; knowledge of life-histories and of habits, of ecology 

 and distribution, of structure and development ; and it is being 

 published in a series of fruitful papers of so great value that 

 every Odonatologist must wish that the series may long con- 

 tinue. 



