370 PROCEEDINGS OF THE NATIONAL MrSEUM. VOL.XX. 



dull flavous beneath, with a median and postmedian fuscous patch on 

 the upper half of the inner face, the geuicular arc plumbeous or fusco- 

 plumbeous; hind tibiae red, the spines black except at extreme base, 

 ten to thirteen in number in the outer series. Extremity of male abdo- 

 men feebly clavate, rounded, upturned, the supraanal plate broad, 

 rounded triangular, the lateral borders slightly bent in the middle, with 

 a narrow, moderately deep, percurrent, median sulcus with moderately 

 high, not very sharp walls, on either side of the posterior extremity of 

 which is a similar, parallel, short ridge; furcula present only as the 

 sbarply rectangulate inner corners of the slightly parted lateral halves 

 of the last dorsal segment; cerci broad, stout, laminate, faintly convex, 

 considerably and regularly incurved, the basal half tapering gently, 

 beyond the middle expanding considerably, more above than below, into 

 a flabellate pad considerably broader than long, bluntly rounded above 

 and below, with nearly straight and truncate, but not broadly truncate, 

 posterior margin, the whole fully as long as the supraanal plate; infra- 

 cereal plates broader than the apical half of the supraanal plate, no 

 longer than it, narrowing rapidly and roundly; subgenital plate rather 

 broad and short, considerably elevated and prolonged apically, entire, 

 extending far beyond the supraanal plate. 



Length of body, male, 25.5 mm., female, 33 mm.; tegmina, male, 19 

 mm., female, 21 mm.; hind femora, male, 13.5 mm., female, 16.5 mm. 



One male, 1 female. Grand Junction, Mesa County, Colorado, 

 August 28, C. P. Gillette, through L. Bruner. 



Although Thomas's description of C. yarrowii was based upon a 

 female only, I am tolerably confident that this species is to be referred 

 to it; it certainly fits it better than any known to me, and its reference 

 here was suggested to me by Professor Bruner. Thomas gave no locality 

 beyond "found in the collection," which was made in "portions of 

 Nevada, Utah, California, Colorado, New Mexico and Arizona." He 

 afterwards mentions it as "probably from Arizona, but possibly from 

 Nevada," without giving reasons. From all that appears it might have 

 come as well from Colorado or Utah. 



129. MELANOPLUS OLIVACEUS, new species. 



(Plate XXV, fig. 3.) 

 ^ Melanoplus olivaceus BRUNER!, MS. 



Dark brownish testaceous with an olivaceous tint, nearly uniform in 

 coloring. Head varying in front from dark olivaceous to fuscous or 

 ferruginous, the vertex like the rest of the body and gently tumid; 

 interspace between the eyes only moderately broad, distinctly narrower 

 than the frontal costa; fastigium very slightly and broadly sulcate; 

 frontal costa moderately broad and equal, hardly reaching the clypeus, 

 sedately punctate at the sides, more or less shallowly sulcate except- 

 ing above; eyes moderately large, rather prominent especially in the 

 male, considerably longer, at least in the male, than the intraocular 



