38 
bulletin 94 . 
males in the collection measure between 43 mm. and 61 mm., 
and the females between 45 mm. and 61 mm. in length. 
The earliest we have found adults at Ft. Collins was July 
10,1901, and then only a single specimen could be found. On 
the 22d of the month adults were common and mating had 
begun. On Aug 1st of the same year some had begun to lay 
eggs and on Sep. 5th adults were common and several pairs 
were seen in coitu (Ball). Egg-laying begins about Aug. 1st. 
In the males of this species the short wings are approx¬ 
imate or even overlapping on the back while in the females 
they are always widely separated. 
SCHiSTOCEBCA Stal. 
albolineata Thomas. What I am considering as this species are very 
closely related to the preceding, the only striking difference 
being the coral red hind tibiae. There are specimens from 
Ft. Collins, Windsor, Timnath, Greeley, Merino, Orchard, 
Sterling, Julesburg, Nepesta, Rockyford, Lamar, Holly, Glen- 
wood Springs, Grand Junction, Delta and Durango in the col¬ 
lection. The examples from the last four places named lack 
the black spots on the hind margins of the abdominal seg¬ 
ments and have the hind tibiae lighter red in color. The ely¬ 
tra are not noticably darker bordering the yellow stripe and 
the notch in the subgenital plate of the male is U-shaped, be¬ 
ing broader than deep. Specimens from Delta and Grand 
Junction were taken from willows and from apple and peach 
trees. When disturbed they would take wing and fly from 
tree to tree. It is very likely these belong to a different spec¬ 
ies than the specimens from the eastern slope. 
lintata Thom. This species occurs entirely across the State from 
north to south, east of the mountains. It occurs along water 
courses and seems to he arboreal in habit. 
The males vary between 30 mm. and 35 mm. in length 
to tip of abdomen, and between 36 mm. and 43 mm. to tips of 
elytra. The females vary between 35 mm. and 48111m. to tip 
of abdomen and between 42 mm. and 57 111111. to the tips of 
the wings. 
The species varies very much in coloration; some are very 
pale yellow, others are yellowish green, and still others are of 
a rusty yellow. All have the hind tibice black behind and 
yellow before. 
The earliest we have taken adults at Ft. Collins was July 
10, 1899. Specimens have been taken as late as Sep. 5th at 
the same place and as late as Sep. 14, 1898 at Rockyford. 
