6 INQUIRIES RELATIVE TO CRAWFISH. 



37. Has a new form come in and destroyed a former one ? 



38. What are its enemies in your vicinity ? 



39. How far does it distribute itself over your region, and does it 



leave localities to return to them again ? 



40. Are they nocturnal or diurnal in feeding, or traveling ? 



41. Does one sex differ from the other in such habits ? 



42. Do they destroy vegetables or other garden products in your 



region ? 



43. Do they cause dams to burst by burrowing through the embank- 



ments ? 



44. Do they sometimes swarm after rains, either during the day or 



night ? 



45. What fish feed on them in your vicinity ? 



46. Do they live singly, in pairs of the sexes, or in communities ? 



47. Does either sex choose the young for food ? 



48. Such as burrow in meadows away from water, how deep do they 



bore the hole ? and in what kind of subsoil ? 



49. Do they always burrow until moisture or water is reached ? 



60. How long does it take to finish the burrow ; stating the kind 

 of ground ? 



51. Do they use the tail as a shovel to scoop out the soil ? 



52. How do they carry it to the surface, and how build the chim- 



ney ? 



53. How do they plug it from beneath ? 



54. How high do they build the chimney ? 



55. Does the winter rain wash it away and leave the hole open ? 



56. At what times, in what seasons, does it build chimneys ? 



