1911] Severins — Care of the Eggs and Rearing of the Walking-Stick 121 



segments, just beyond the trip of the leg-case. They may be an 

 abnormality. 



The species is only half as large as an average Nymphula. 



Specimen from Cedar Lake, in the northwest corner of New 

 Jersey. This genus is evidently much nearer to Nymphula (Hydro- 

 campa) than to Paraponyx, but may be easily distinguished by the 

 different case and different front and labrum of the larva; and 

 by the very small size of the pupa (perhaps also by the ridges on 

 the under side of the abdomen.) 



A FEW SUGGESTIONS ON THE CARE OF THE EGGS 



AND THE REARING OF THE WALKING-STICK, 



DIAPHEROMERA FEMORATA SAY. 



By Henry H. P. Severin, College of Hawaii, and 

 Harry C. Severin, South Dakota State College. 



Some difficulty seems to have been experienced by a number of 

 investigators to determine the number of molts which various 

 species of Phasmids have. In a previous paper (7) we discussed 

 the diversity of opinions of various entomologists concerning the 

 number of molts undergone by our common American walking- 

 stick, Diapheromera femorata. Among the European Phasmidae, 

 Bacillus rossii seems to offer the greatest opportunity for a 

 difference in opinion as to the probable number of molts. 

 According to Pagenstecher,^ Bacillus rossii casts its skin seven or 

 eight times, while Kheil (4) and Godelmann (3) both agree upon 

 five molts. Daiber (2), who did some work on this same species 

 of walking-stick, is unable to give the number of molts with cer- 

 tainty', because as she explains, the process of ecdysis occurs dur- 

 ing the night and the exuviated skins are often eaten immediately 

 by the recently molted walking-sticks. She says, "Da aus den 

 angeftihrten Griinden mit Leichtigkeit eine Hautung iibersehen 

 werden kann, mochte ich diese Zahl von 5 Hautungen als 

 Minimum bezeichnen." v. Baehr (l) "mochte audi behaupten, 

 dass die Zahl 5 zu klein ist." 



' Paper not accessible. Quoted from GodelmanH's (3) paper. 



