SUBFAMILY I. TETRIGINJE. 167 



A study of the type and other specimens of Tettix crassus 

 Morse (1899, 201) from both the Morse and the U. S. National 

 Museum collections, shows no characters sufficiently distinctive 

 to separate it from ornatum. Three of the specimens labelled 

 crassus from the National Museum collection I regard as only 

 slender bodied males of the long form, or typical ornatum, one of 

 them, from Constantine, Mich., having been determined by Han- 

 cock, and furnishing the basis for his Michigan record of crassus 

 (1906, 59), which is the only record from the eastern States, it 

 having been described from Colorado and recorded from British 

 Columbia, Nebraska, New Mexico, Missouri and Kansas. Morse 

 agrees with me, not only in making crassus a synonym of orna- 

 tum, but in reducing his hancocki to varietal rank. 



67a. ACRYDITJM ORNATUM HANCOCKI (Morse), 1899, 200. Hancock's Grouse 

 Locust. 



A variety of A. ornatum Say, with which it agrees in color, granula 

 tion and rugosity of surface, but differs in its more robust form, with 

 wider and slightly more projecting vertex, and "notably in the enlarged 

 middle femora, the expanded portion of the latter in the male being nean> 

 or quite one-half as broad as long (in ornatum seldom more than one- 

 third), the difference less noticeable in the female." Pronotum with hu- 

 meral angles more pronounced and mid-carina slightly more elevated in 

 front of shoulders. Length of body, 5,8.3 12, $,9 13; of pronotum, $, 

 8.511, 9, 812; of hind femora, $,5, 5, 5.56 mm. 



Marshall, Marion, Vigo and Crawford counties, Ind., May 20 

 Nov. 3 ( W. 8. B. ) . Morse's cotypes were in part from Vigo Coun- 

 ty. Ranges from Montreal west to Saskatchewan, and widely dis- 

 tributed in the Upper Austral and Transition zones of the U. S., 

 west to Colorado and south to North Carolina, Tennessee and Cen- 

 tral Arkansas, occurring most generally on moist upland soils of 

 sandy texture, especially on high elevations. In Indiana it fre- 

 quents the same localities as A. oniatum, the two being often 

 found in company. Forms with both long and short pronotum 

 are known, the name abbreviatum having been given to the short 

 one, which is usually the more abundant. In the long form the 

 pronotum and wings pass the hind femora about 3.5 mm. 

 68. ACRYDIUM ACADICUM (Scudder), 1875f, 345. Acadian Grouse Locust. 



Body robust. Color grayish- or clay-yellow, the pronotum often with 

 a small black spot each side in front of humeral angles and a larger one 

 behind them, these sometimes separated by a wide saddle-shaped white 

 spot; hind femora with a few scattered black markings. Vertex more 

 than twice as broad as one of the eyes, strongly advanced in front of them, 

 the front margin rounded or feebly obtuse-angulate, its median carina dis- 



