66 
bulletin 94. 
description of M. flabellifer ,only that all of them lack the fully developed 
tegmina and wings of that insect. The specimens from Palisades are de¬ 
cidedly tinged with rufous, while those collected at Paonia are cinero- 
plumbeous as indicated for the normally long-winged form. 
Length of body, <J\ 14-16 mm., 9,21 mm.; of antennae, 7.5 mm., 
?, 7 mm.; of tegmina, <6\ 5.5 mm., 9? 7 mm.; of hind femora, J', 8.5-9 
mm., 9) 10-11 mm. 
Habitat. 4 and 1 9, Palisades, Colorado, July 8, 1901; 2 ^s and 
1 $, Paonia, Colorado, September 20, 1903, (Collection 
Colorado Agricultural College). 
The following synoptic table which has been somewhat mod¬ 
ified from Scudder’s (Revis. Melanopli, pp. 124 and 130, and 
Suppl. p. 160) will give at a glance the characters separating the 
various recognized forms belonging to the series: 
d 1 . Cerci of male very broad and short, not more than twice as long 
as the middle breadth, and broadly rounded at apex. (2. Flabelli¬ 
fer series.) 
e 1 . Tegmina fully developed. 
p. Cerci of male twice as broad in broadest as in narrowest 
portion. 
g l . Subgenital plate of male with a distinct though mi¬ 
nute independent apical tubercle. occidentalis Thom. 
g 2 . Subgenital plate of male with only one obscure trace 
of apical tubercle. cuneatus Scudd. 
p. Cerci of male with no striking inequality in breadth. 
flabellifer Scudd. 
e 2 . Tegmina more or less abbreviated. 
p. Tegmina about half as long as the abdomen and much 
longer than the pronotum. 
g l . Cerci of male broadly longitudinally sulcate apically, 
as in flabellifer. flabellifer brevipennis n. var. 
g 2 . Cerci of male not longitudinally sulcate apically. 
h 1 . Interval between mesosternal lobes of male twice 
as broad posteriorly as anteriorly, the inner mar¬ 
gins of the lobes regularly divergent; interval in fe¬ 
male longer than broad; cerci of male but little longer 
than broad. discolor Scudd. 
h 2 Interval between mesosternal lobes of male near¬ 
ly equal breadth in front and behind, the inner mar¬ 
gins of the lobes convex; interval in female trans¬ 
verse; cerci of male nearly twice as long as broad. 
simplex Scudd. 
f 2 . Tegmina shorter than pronotum. 
g 1 . Furcula of male only as long as the last dorsal seg¬ 
ment; cerci in apical half equal and deeply sulcate longi¬ 
tudinally, so as to appear bent at right angles. 
rileyanus Scudd. 
g 2 . Furcula one-fifth as long as supraanal plate; cerci in 
apical half tapering, not sulcate. blandus Scudd. 
Melanoplus dimidipennis new species. 
A brachypterous insect the size of which is slightly below the 
medium and in which the tegmina and wings reach a trifle beyond the 
middle of the abdomen. Legs, under parts, and abdomen very light 
colored, the latter almost white except the two basal segments which for 
the most part are black on sides and above. Pleurae and upper half of 
sides of front lobe of pronotum also very strongly marked with fuscous, 
their ground color along with greater portion of head light plumbeous. 
Hind tibiae dirty yellowish-white with a greenish tinge. 
