114 PRELIMINARY LIST 



Psylla purshiae Riley Ms. Det, Eiley, 



Rist Canon, May 29th; Steamboat Springs, July 26th; 

 Trii:idacl, May 14th (Gillette). 

 Psylla 4-lineata Fitch. Det. liiley. 



Soldier Canon, five miles west of Fort Collins, May 19th 

 (Cillette). 



Psylla ribis Eiley Ms. Det. Riley. 



Spring Canon, May 11th and June 5th; Fort Collins, 

 October 15th and May 9th; Trinidad, May 14th (C4illette). 

 Dixon's Canon, May 6th on Ribes cereum (Baker). 

 Pachypsylla celtidis-unibiliciis Riley. Det. Riley. 



Golden, April 30th (Gillette) . 



Muphyllura arctostapliyli Eiley Ms. Det. Riley. 



Spring Canon, July 24th, imagos and nymphs on Arctos- 

 taphylos uva-ursi (Cowen). 

 Aphalara angiistipennis Riley Ms. Det. Riley. 



North Park, July 20th; Steamboat Springs July 26th; 

 Montrose, June 24th; Fort Collins, July 4th; Dolores, June 

 18th; Estes Park, July 11th; Colorado Springs, August 2d 

 (Gillette). Fort Collins, June 12th, on alfalfa (Baker). 



Aphalara calthae L. Det. Riley. 



Fort Collins, May 8th; Rist Canon, May 29th (Gillette). 

 Fort Collins, May 16th to 31st on alfalfa, and May 7th on 

 gooseberry; Steamboat Springs, July 12th on Carex (Baker). 

 Canon City, October 15th in all stages on tomato (John 

 Gravestock). Green Mountain Falls, Colorado Springs, July 

 (Tucker). 



Aphalara epilohii Riley Ms. Det. Riley. 



Ouray, June 22d (Gillette). 



Aphalara harrisii Riley Ms. Det. Riley. 



Near West Cliff, Custer County (Cockerell, 10). 



North Park, July 19th; Fort Collins, June 14th; Estes 

 Park, July r2th (Gillette). 



Aphalara marginata Riley Ms. 



Custer County, midalpine (Cockerell, 10). 



