PSYCH K- 



SOME INSECTS OF THE HUDSONIAN ZONE IN NEW MEXICO. — I. 



From Aug. i to 4 of the present year 

 my wife and I had an opportunity to 

 collect the almost unknown fauna and 

 flora of the Hudsonian Zone in New 

 Mexico. The locality visited was the 

 summit of the range between the Pecos 

 and Sapello rivers, near the headwaters 

 of the Pecos. This is the main divide 

 between the Rio Grande and Mississippi 

 river systems, and has an elevation of 

 about iijoco ft. The sides of the 

 range, from about 8000 ft. upwards, 

 possess a very uniform fauna and flora, 

 belonging to the Canadian Zone. When 

 we arrive at the summit however we find 

 a tableland of moderate width, inhab- 

 ited by a very different set of organ- 

 isms. The plants have the low stature 

 and large flowers so characteristic of al- 

 pines, the bees are nearly all Boinbus 

 and among the butterflies we see 7\ir- 

 nassius, Bieiithis and Collas scuddcri. 



The plants and mollusca will be re- 

 ported on elsewhere, but the insects and 

 arachnids will all be enumerated in the 

 following pages, the several groups hav- 

 ing been kindly worked up by those 



who are most familiar with them. 

 When the series of articles has been 

 completed, it may be possible to add 

 some comments of a general nature. 



T. D. A. Cocker ELL. 



ARACHNIDA. 



1!Y NATHAN BANKS. 



Araiicida. 



Pardosa glacialis Thoreli. One fe- 

 male. Known from boreal and sub- 

 boreal regions. 



Xysticus gulosus Keys. One young 

 specimen. Known from a large part of 

 our country. 



Dictyna sp. One female. 



Erigone sp. One female. 



Prosthesima sp. Several young 

 specimens; near, and possibly identical 

 with, P. hlanda Bks. 



Phahingida. 



Homolophus biceps Thoreli. Five 



specimens ; previously known from Col- 

 orado, Wyoming, and Montana. 



