NO.H24. REVISION OF THE MELANOPLISCUDDEE. 391 



I know of but a single species, which inhabits the Pacific coast from 

 Canada to Mexico, and which assumes three forms according to the 

 length of the organs of flight, that with the organs fully developed 

 being thus far known only from southern California, from the head of 

 the San Joaquiu Valley to San Diego. It is distinguished from the 

 others not only by the development of these organs, but by a slightly 

 slenderer body, the grossness of the others seeming to be correlated 

 with their incapacity of flight. 



OEDALEONOTUS ENIGMA. 

 (Plate XX VI, figs. 4-6.) 



Melanoplus coUaris SCUDDER!, Can. Ent., XII (1880), p. 75. 

 3Ie,lano2)lns flai'oannitlatus BRUNKR, Ins. Life, III (1890), p. 140. 

 Pezotettix enigma BRUNER, Bull. Div. Ent. U. S. Dep. Agric., XXVIII (1893), 

 pp. 33-34, fig. 17. 



OEDALEONOTUS ENIGMA COLLAEIS. 



(Plate XXVI, fig. 6.) 



Melanoplns collaris SCUDDER!, Proc. Boat. Soc. Nat. Hist., XIX (1878), p. 286; 



Eiit. Notes, VI (1878), p. 45. BRUNER, Eep. U. S. Ent. Coram., Ill (1883), p. 60. 

 Caloptenus Jiavolineatus BRUNER (nee THOMAS), Bull. Div. Ent. U. S. Dep. Agric., 



XXVIII (1893), p. 33. 



OEDALEONOTUS ENIGMA ENIGMA. 

 (Plate XXVI, fig. 5.) 



Pezotettix enigma SCUDDER!, Ann. Rep. Chief Eng., 1876 (1876), p. 505; Ann. Rep. 

 Geol. Surv. 100th Mer., 1876 (1876), p. 285; Proc. Bost. Soc. Nat. Hist., XIX 

 (18?8), p. 287 ; Ent. Notes, VI (1878), p. 46. BRUNER, Rep. U. S. Ent. Comm., 

 Ill (1883), p. 59; Can. Ent v XVII (1885), p. 15; Bull. Div. Ent. U. S. Dep. 

 Agric., XXVII (1892), p. 29. 



OEDALEONOTUS ENIGMA JUCUNDUS. 

 (Plate XXVI, fig. 4.) 



Pezotettix jucundus SCUDDER!, Ann. Rep. Chief Eng., 1876 (1876), p. 505; Ann. 

 Rep. Geol. Surv. 100th Mer., 1876 (1876), p. 285. BRUNER, Rep. U. S. Ent. 

 Comm., 111(1883), p. 59. 



Body yellowish testaceous marked with brownish fuscous. Head 

 above, behind the narrowest part of the vertex, marked with an 

 elongated, expanding, blackish fuscous stripe, through the middle of 

 which runs a yellow line, and by a supraorbital arcuate band of a simi- 

 lar color, usually broken, often obsolete, and terminating just below 

 a narrow short yellow stripe behind the upper part of the eye; space 

 between the eyes rather narrower than the frontal costa, the fastigium 

 broadening considerably in front of the eyes and broadly sulcate 

 throughout ; frontal costa broad and nearly equal, broadest just above 

 the ocellus, rather sparsely punctate, and at the ocellus very shallowly 

 sulcate, often nearly imperceptible. Pronotum short and rather stout, 



