SUBFAMILY III. UMTSTIN.K 431 



Gillette (11)04, 94), j><ick<ii<Ui is a common species everywhere, 

 June 24 Oct. 8, in grassy glades and mountain parks up to 8,000 

 feet or more. Of the 127 specimens in the college collection at 

 Ft. Collins, the hind tibia? of 54 were blue and of 73 red. Of 

 J/. fa-tlux, Brunei- (1893, 22) wrote: "This locust is in reality a 

 mountain form that occurs mainly at an elevation of about 5,000 

 feet, and that frequents the edges of valleys and sunny slopes 

 within the semi-arid portion of the United States. In its general 

 appearance and structure M. fa'dus is very much like the insect 

 which is known by the name of M. p<ickardn Scudder. In fact 

 there is but little difference save in color between the two spe- 

 cies." It will be seen that Scudder, Brunei- and Morse, three of 

 the best Orthopterologists this country has produced, have found 

 no fixed characters separating fa'diis from puckardii, but for some 

 reason have hesitated in combining the two names. I have no 

 such hesitation and herewith place fcedus as an absolute synonym 

 of packardii. 



201. MELANOPLUS FLUVIATILIS Brunei-, 1897, 136. Sand-bar Locust. 



Size medium; form slender, male, more robust, female. Above gray- 

 ish- or pale olive-brown, beneath pale to dull greenish-yellow. Face and 

 lower portion of lateral lobes pale olive-green, usually immaculate. Oc- 

 ciput and disk of pronotum greenish-gray contrasting strongly with the 

 distinct dark prozonal stripe below them. Tegmina pale grayish-brown, 

 either immaculate or with a few faint scattered fuscous dots. Hind femora 

 dull yellow, the upper face with two more or less distinct fuscous bars, 

 lower face coral red; knees fuscous. Hind tibiae pale glaucous, the spines 

 black, pale at base. Occiput and frontal costa much as in angustipennis. 

 Fastigium less declivent, feebly and broadly sulcate, male, shallowly con- 

 cave, female. Disk of pronotum almost flat, the prozona one-fourth longer 

 than metazona. male, scarcely longer, female. Tegmina of male very nar- 

 row, feebly tapering from base to the rounded tips; of female broader, of 

 nearly equal width throughout. Prosternal spine slender, subcylindrical, 

 its tip somewhat pointed, male, stouter with blunt apex, female. Supra- 

 anal plate as described under the series heading, its margins not thickened 

 and but feebly upcurved; median sulcus vague, very shallow, its bounding 

 ridges very broad and low. Furcula consisting of very short widely diver- 

 gent processes, lying outside the median ridges, their basal halves broad 

 and suddenly constricted into the very slender apical portion. Cerci scarce- 

 ly differing from those of angustipennis, slightly longer and more incurved. 

 Subgenital plate scoop-shaped, as broad as long, its apical margin not ele- 

 vated, feebly thickened at extreme apex. Length of body, $ , 22 23, 9 , 

 25 26; of antennae, $,10, 9,9; of pronotum, $ , 5, 9,6; of tegmina, $, 

 1720, 9, 2021; of hind femora, $, 1212.5, 9, 13.514 mm. (Fig. 147.) 



Ashland, Neb. (Bnnic-r)-, Iowa City. la. (CumlrJJ). This 

 prettily colored, slender-bodied species is known east of the Mis- 



