366 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 10 



topographic maps, collecting outfit, numerous pill boxes and vials for 

 use as insect containers, microscope, stain, cameras, first aid outfit, 

 etc. The automobile used in the survey was of five-passenger capacity, 

 equipped with a good sized dunnage box. The personal effects of the 

 party were carried in cases and bags. 



Between April 13, the date on which the automobile was received, 

 and May 10, the day on which the scheduled survey began, a number of 

 trips were made in the San Francisco Bay region as far south as Palo 

 Alto to study certain local mosquito conditions. On the morning of 

 May 10, the party, consisting of the writer, Mr. Freeborn and a stu- 

 dent driver, who also gave his services free to the state, left the campus 

 of the University of California. The first few days of the survey were 

 spent chiefly in the Vaca Valley working from Suisun to Winters, 

 thence to Dixon, Davis and Woodland, where a second party consisting 

 of a group of University of California students joined in the work of 

 the survey. This group of students remained with us for the first 

 six weeks of the trip and proved of considerable value in collecting and 

 locating breeding places. From Woodland our work proceeded up 

 the west side of the Sacramento to Orland thence to Hamilton and 

 south to Princeton and Colusa. From Colusa we again went north- 

 erly as far as Redding, thence southerly to the east side of the Sacra- 

 mento to Chico, thence to Marysville. In each instance the inter- 

 vening territory was carefully studied, and several days were devoted 

 to a study of the more 'important communities and their tributary 

 settlements. From Marysville we again proceeded northward to 

 Redding, thence to Dunsmuir, Yreka, Hornbrook over the Siskiyou 

 Mountains to Ashland (Oregon) in order to trace the species to the 

 extreme northern boundary of the state. From Ashland the trip was 

 made to Klamath Falls and at once into California again through 

 Modoc County, stopping at Alturas, thence to Susanville and to Reno 

 (Nevada) via Doyle. Our next headquarters were at Loyalton, thence 

 to Sierraville, Truckee and Placerville via Lake Tahoe. Our first 

 trip closed June 23, when a few days were spent at Berkeley to replen- 

 ish our equipment. 



The second trip began June 27, going directly to Sacramento thence 

 to Marysville, Oroville, Quincy, Downieville, Nevada City, Grass 

 Valley, Auburn, Truckee, Placerville, Jackson, Sonora, Yosemite, 

 Merced, returning to Berkeley July 23. During this trip our principal 

 object was to ascertain conditions in the northern Sierra foothill region. 



On July 26 the third trip was begun and consisted of a survey of 

 Marin County, particularly the salt marsh problem of San Rafael and 

 vicinity, thence to Petaluma, Sonoma, Santa Rosa, Sebastopol, Healds- 

 burg, Cloverdale, Hopland, Lakeport, Upper Lake, Middletown, 



