REPORT OF ENTOMOLOGIST. 
53 
the plains and for a considerable distance into the foothills. 
In fact it seems to prefer the slopes of the lower foothills 
and the plains near them. We have found it in places 
rather common on alfalfa and have frequently noted the species 
upon blue-grass (.Agropyrum glaucum ) and rush-grass {Spo- 
robolus crypt andrus). 
This is also the earliest of the Melanopli to mature. We 
have taken adults fairly common at the foothills near Ft. Col- 
„ lins on June 6th, 1902 (Ball). The latest that we have taken 
adults is Aug. 22, 1902 at Ft. Collins. This species occurs 
as far south as Pueblo, at least. It has been taken at the fol¬ 
lowing points: Ft. Collins, Laporte, Livermore, Julesburg, 
Wray, Denver, Palmer Lakte and Pueblo. 
Our males vary in size between 17 mm. and 20 mm. and 
the females between 23 mm. and 26 mm. 
Specimens have been taken at an altitude of 7,000 feet in 
the foothills. 
monticola Bran. Three males and one female from Windy Point, 
Pike’s Peak, at an altitude of about 12,000 feet, Sep. 17th, 
I 9°3 (Cockerell). 
occidentals Thom. This is a common and wide spread species. It 
seems to occur over the entire plains region from north to 
south. It is common among the lower foothills and upon 
grassy areas in the mountains to an altitude of 8,000 feet, at 
least. In the lower altitudes the males vary commonly between 
19 mm. and 22 mm. in length and the females between 19 
mm. and 24 mm. Specimens taken at higher altitudes, as at 
Dolores, Durango and Buena Vista, are decidedly smaller and 
darker in color. The males from these higher altitudes meas¬ 
ure between 15 mm. and 18 mm. and the females between 17 
mm. and 19 mm. 
Adults have been taken as early as June 17th at Ft. Col¬ 
lins, 1898, and at Lamar 1900 (Ball). At Ft. Collins there is 
very little mating before the first of August and males have 
been taken as late as September 12th. There is but one 
brood. Food-plant not known. 
We have taken this species at Ft. Collins, Livermore, 
McCoy, Dutch George’s, Wray, Sterling, Snyder, Greeley, 
Denver, Pueblo, Rockyford, Las Animas, Lamar, Trinidad, 
Buena Vista, Durango, Gunnison, Antonito and Dolores, and 
at Kimball and Stratton in Nebraska. 
The cerci of the males of this species vary consid¬ 
erably in form, the extremes resembling very closely, if they 
