874 PROCEEDINGS OF THE NATIONAL MUSEUM. 



female sometimes large and distinct but usually much smaller than in 

 the male and sometimes niiimto or oven wholly absent. Cerci of male 

 cylindrical, longer than the last a])dominal segment and, except in 

 D. riirxllhnia, strongly incurved. 



Ourconnuon northern walkingstick belongs to this genus, the species 

 of which are distributed more widely over our country than those of 

 any other of our gt^nera. None of the species have been found west 

 of the Rocky Mountains. Five species occur in the United States. 

 They may be separated h\ the following table, which is for the greater 

 part taken from a paper on this genus by Dr. Scudder:" 



«. Male cerci strongly incurved. 



h. Ninth abdominal segment of male subequal, scarcely larger at apex than at base, 

 the seventh segment much longer than the eighth; male cerci with a basal 

 tooth. i 



c. Inner ventro lateral carina of the posterior femora with minute serrations; ' 

 meso- and metathorax unicolorous. 

 (/. Male cerci with a blunt tooth at inner inferior base (Plate LVIII, fig. 6); 

 female cerci relatively stout, about half as long as the last dorsal segment. 



femorata Say. 



d(L Male cerci with a sharp thorn at inner inferior. base (Plate LVIII, fig. 5); 



female cerci relatively slender, almost or quite as long as the last dorsal 



segment veliei Walsh. 



cc. Inner ventro-lateral carina of the posterior femora smooth; meso- and 

 metathorax longitudinally marked with black beneath. 



arizoueiisis, new species. 



hh. Ninth abdominal segment of male apically inflated, and here nearly half as 



broad again as at base, the seventh and eighth segments of subetjual length; 



male cerci without a basal tooth caroliiia Scudder. 



aa. Male cerci rigidly straight mesillana Scudder. 



DIAPHEROMERA FEMORATA Say. 



Plate LVII, fig. 4; Plate LVIII, fig. 6. 



Spectrum femoralum Say, Exp. Long., II, 1824, p. 297; Amer. Ent., Ill, 1828, 



p. 37, pi. XXVII.— Leidy, Proc. Acad. Nat. Sci. Philad., Ill, 1846, pp. 80-84. 



Diapheromera femorata Harris, Treat. Ins. Inj. Veg., 1840, p. 119. — Scudder, 



Psyche, IX, 1901, p. 188. 

 Phasma {Bacteria) femorata Haan, Bijdr. kenn. Ortli., 1842, pp. 101, 134. 

 Bacunculus femoratus Uhler, Harris, Treat. Ins. Inj. Veg., 3d ed., 1862, p. 146. 

 Diapheromera myi Gray, Syn. Phasm., 1835, p. 18. 

 Bacteria sayi CnARPEiiTER, Orth. descr., 1841-1845, pi. iv. 

 Bacteria {Bacuncnlux) .soi/y Burmeister, Handb. Ent., II, 1838, p. 566. 

 Baruv cuius say i Thomas, Trans. 111. St. Agric. Soc, V, 1865. p. 441. 

 Bacteria linearis Gosse, Lett. Alab.,1859, p. 275. 

 Color fuscous or green, tlie males more often exhibiting the latter 

 color. Mature individuals, especially the females, are almost always 

 fuscous during th(> autumn months. The middle femora of the dark 

 colored males are distinctly banded with lighter color. 



Head smooth in both sexes, subquadrate, scarcely elongate, obliquely 



"Psyche, IX, 1901, pp. 187-189. 



