ENTOMOLOGY OF COLORADO. 307 



7864 feet (sometimes given as 7718 feet). Not far off is Ula, 7819 

 'feet, now hardly a village. 



The valley is watered mainly by Grape Creek, which rises to the 

 south, near Music Pass, and passing West Cliff, Ula and Dora, goes 

 down a narrow canon to join the Arkansas close to Canon City. 

 Short Creek, coming from the vicinity of Gibb's Peak, and Swift 

 Creek, descending from the Lakes of the Clouds, both belong to the 

 Grape Creek basin ; but immediately to the north of these is Willow 

 Creek, which belongs to the Texas Creek basin. Texas Creek, of 

 which Brush Creek is a tributary, does not run into Grape Creek, 

 but flowing northward joins the Arkansas higher up. The Cusack 

 Ranch, 8192 feet, is situated just on the divide between the Grape 

 Creek and Texas Creek basins, and also at the junction of the forest 

 and the open country, so that it is an exceptionally good locality for 

 collecting. The latitude of Wet Mountain Valley is about 38° N. 



CLIMATE. 

 The climate is dry ; not too hot in the Summer, cold in the Winter. 

 The earliest flowers — Anetnone patens var. nuttalliana — appear at 

 the end of March or beginning of April. Humming-birds arrive 

 at the end of May, and the night-hawks at the beginning of June 

 (for further details, see the 9th and 12th Reports of the Colorado 

 Biological Association). 



PLANTS CHARACTERISTIC OF THE REGION. 



The following plants may be noted as characteristic of the mid- 

 alpine zone of Custer County, Colorado: Clematis donglasii, Hook.; 

 Anemone cylinchica, Gray ; A. patens var. nvttalliana, Gray ; Haniin- 

 culus cymbalaria, Pursh ; Caltha leptosepala, DC ; Delphinium scopu- 

 lorum, Gray ; Aconitum cohmibiannm, Nutt. ; Berheris repens, Lindl. ; 

 Argemone platyceras, L. and O.; Viola nuttallii, Pursh; V- cana- 

 densis, L. ; Silene scouleri, Hook ; Sidalcea malvceflora. Gray ; S. 

 Candida, Gray ; Malvastrum coccineum, Gray ; Linnm pereiine, L. ; 

 Thermopsis Montana, Nutt. ; Oxtjtropis lamberti, Pursh ; Bubus stri- 

 gosus, Mx. ; Potentilla fruticosa, L. ; Rosa blanda var. arkansana 

 (Porter) ; Ribes aureum, Pursh ; Epilobium angustifolium, L. ; (Eno- 

 thera biennis, L. ; Cerens viridiflorus, Eng. ; Ligusticum montanum, 

 B. and H. ; Cymopierus montanus, T. and G. ; Heracleum lanatnm, 

 Mx. ; Townsendia sericea, Hook ; Aster Icevis, L. ; Antennaria dioica, 

 Goertn. ; Achillea millefolium, L. ; Senecio aiirens, L. ; Cnicxis ochro- 

 centrus, Gray ; Campanula rotundifolia, L. ; C. planiflora, Eng. ; 



TKANS. AM. ENT. SOC. XX. NOVEMBER, 1893. 



