from the Sacramento and White Mountains. 139 



valley of the Rio Tularosa, which is a beautiful clear stream 

 furnishing water for irrigating the small patches of the Indians 

 and the several small ranches situated in the valleys of the 

 canon. The best collecting of all was done on the flowers of 

 the rankly growing Bigelovia graveolens, var. glahrata, in 

 October, along this road, which usually follows the course of 

 the stream up closely here. This collecting was done in the 

 upper extent of the long stretch of Bigelovia patches, the 

 altitude being from about 5700 to 6200 feet. An account of 

 this is given under the head of Dejeania rutilioides. These 

 patches of Bigelovia extend all the way down the valley, in 

 close proximity to the stream, with hardly a break, from 

 Blazer's Mill, which is less than a mile below the Agency, 

 elevation about 6200 feet, to the halfway point to Tularosa, 

 where the road crosses the stream, elevation about 5200 feet, 

 a distance of 8 miles. The plants are often immense, with 

 heavy woody trunks and branches, and some stand as high as 

 8 or 9 feet. They are in the height of bloom about the Ist of 

 October. The October collecting on the E-io Ruidoso was 

 done on flowers of Senecio Douglasii ; on the Rio Bonito the 

 October collecting was done on Aster Icevis, which grew 

 rankly in large patches bearing profuse bloom. 



My thanks are due to Professor E. O. Wooton for the 

 determinations of the plants. Professor Wooton writes me 

 that his material of the Ehus mentioned in this paper agrees 

 more nearly with the descriptions of R. glabra than with 

 anything else ; but he adds that he had no authentically 

 named glabra material by him for comparison. Prof. J. D. 

 Tinsley, independently of Professor Wooton's determinations, 

 also sent me the names of five of the plants, and considers 

 the Rhus to be R. glabra. 



A portion of the Diptera treated in this paper was collected 

 by Professor Wooton in June and July, lb95, while on a 

 botanical trip on tlie Ruidoso and eastern slopes of Wiiite 

 Mountain. Not only was record kept on his trip of the 

 flowers on which the Diptera were obtained, but care was taken 

 to secure approximately by aneroid the elevations of the prin- 

 cipal places where collecting was done, which information is 

 very valuable. All material aside from tiie above was 

 collected by the writer in October 1895. 



All elevations given with the word " about " are estimates 

 made by the writer from points in the vicinity whose eleva- 

 tions are known. They have been carefully estimated, and 

 can be taken as very nearly correct. 



