VOL.1, pp. 17-40. ^-^«S S^*-^ FEBRUARY 10. 1904. 



INVERTEBRATA PACIFICA 



Contributions from and through Department of Biology, Pomona College. 

 Edited by C. F. BAKER, Claremont, California. 



DIPTERA 



REPORTS ON CALIFORNIAN AND NEVADAN 

 DIPTERA, I. 



C. F. BAKER. 



Only throug-h the kindly interest of Mr. D. W. Coquil- 

 let of the National Museum, does it become possible to 

 publish these first results of the collection of the past year, 

 at this time. Acknowledgments are also due Prof. J. M. 

 Aldrich for the determination of most of the Dolichopo- 

 didae. 



The material recorded herein was all collected in three 

 regions, Ormsby County, Nevada, the vicinity of Stanford 

 University, California, and about Claremont, Los Angeles 

 County, California. The work done so far has been any- 

 thing- but thorough, and taken all together represents but 

 very few hours actual labor. Indeed, the results are but a 

 by-product of other very pressing work. It will be noted 

 that the Stanford material is composed entirely of vernal 

 and autumnal species, since I have never been there 

 through the midsummer. 



All the Nevadan material was taken by my wife or 

 myself about our summer camp in the head of King's 

 Canyon west of Carson City. The tents were placed just 

 within the pines. Near them, in a tangled patch of wil- 

 lows and alders, welled up a small spring which supplied a few 

 acres of meadow on the hillside below. Quite a variety of 

 herbaceous plants grew in this vicinity. On the other 

 side a few steps carried one among the sage and rabbit- 

 brush (Chrysothamnus). Even though so manifestly in- 

 complete, still the comparison of these collections is very 



