SUBFAMILY I. BACUNCULIN.E. 141 



taken at Argo, 111., July 27, and lias collected others at Palos 

 Park and Fourth Lake, 111. Somes (191G) records M. blatchleyi 

 from Iowa and Missouri, the sexes occurring in about equal num- 

 bers. Elsewhere the males seem to have been very scarce. 



As noted above under D. veliei, many if not all the eastern rec- 

 ords of that species probably refer to M. bhitc-JiJci/i, the females 

 especially of the two forms being very difficult of separation. 

 Davis (Ms.) states that he now considers the species occurring 

 about New York City, and formerly thought to be D. veliei, as M. 

 bhttcltleyi, but that no males have as yet been taken on either 

 Long or Staten Islands, although the females are fairly common 

 on golden-rod, asters and associated plants. Morse (1010, 16) re- 

 cords an adult female a^id nymph of blatclilci/i from Greenwich, 

 Conn. The known range of blatchleyi therefore extends from Kan- 

 sas and Oklahoma to Virginia and Connecticut. 



Under the generic heading I have referred to the close relation- 

 ship between the genera Ditipheronicra and Mfuinmcra. The spe- 

 cies blatclilet/i seems to be a sort of connecting link between the 

 two. The rather short head and thick middle thighs of male would 

 refer it to the former and the unarmed hind femora to the latter 

 genus. 



ITT. HETEROXEMIA Gray, 1835, 13. (Gr., "different" + "race.") 



Head of male unarmed, of female with two longitudinal ridges 

 between the eyes; first abdominal segment longer than wide; hind 

 femora of female sube<|ual in length to that of the four basal ab- 

 dominal segments combined, of male much longer than those seg- 

 ments; all the femora unarmed; cerci of male of similar shape 

 and proportions as those of Diapheromera. 



Two species of this genus were described by B runner (1007, 

 336). both of which were in part from localities within the area 

 covered by this paper. Caudell (1013, 613) states that they a are 

 very probably synonyms of other species, but until the types are 

 seen it is not deemed advisable to so place them." The females 

 were separated by Brunner as follows : 



KEY TO EASTERN SPECIES OF HETEROXEMIA. 



a. Second and third segments of abdomen scarcely longer than broad: 



cerci short. 58. L/EVISSIMUS. 



ao. Second and third segments of abdomen twice as long as broad; cerci 



long, lanceolate. 59. TKXAXUS. 



