ELISHA MITCHELL SCIENTIFIC SOCIETY. 39 



leg and palpus so that the spider died the next day. At the 

 time I thought the spider must have underground galleries 

 in which it hunted for ants similar to the galleries in the 

 moss of the nest of iV^/f//iT//i/Y//a marxii. But since finding 

 the nests of other individuals I think there must have been a 

 branch from the main tube with a trap door, and the soil 

 being so full of rocks I failed to find it. 



The second individual I collected on the morning of Apr. 

 6, '86, while digging into a side hill with a southern expos- 

 ure for white ants (7Vrme9 ^r/r/p'-s). Discovering a tube I 

 traced it until I found at one side a trap door opening into a 

 short branch. In this I found a fine specimen of trap-door 

 spider. The nest I concluded belonged to the type called 

 by Mr. Moggridge, *' Double door branched nest," but dif- 

 fers from that in having a cork door instead of a wafer door. 

 I did not see the door at the end of the main tube, it there 

 was one, as the soil was very loose and rocky, and every 

 trace would have been destroyed before finding the main 

 tube. 



The third individual was collected in the afternoon of the 

 same day, by one of the students, D. E. AVoodley. The 

 tube ran under a stone, a trap-door was at the upper end, 

 but the branch and second door was not seen. Mr. Wood- 

 ley said, however, that it might have escaped his notice as 

 the tube was not traced out very clearly. 



The fourth individual I collected Apr. 6. On turning over 

 a stone I saw what is represented in fig. 16, Plate IV, except 

 that the trap door was closed, and the spider was in the tube 

 a short distance below it. The space above the trap door is 

 a portion of an ant's nest, h is the entrance from the surface 

 of the earth ; a, «, is a broad hall-way leading off into galler- 

 ies on the side. The spider had come down at h, undoubt- 

 edly during the night while the ants were quiet, unconscious 

 of the purpose cf their terrible enemy, dug the hole in the 

 center of this hall-uay, and covered it with a trap-door be- 

 fore the ants were stirring at the break of day. The soil 

 was in a good condition for tracing out the tube, which I did 

 very carefully and found neither branch nor second door, so 

 that this nest was of the type si mjle cork (h)<n\tuil>r(nK'h('(l nest . 



The fifth I collected on the same day and not more than 

 10 feet distant. Turning over a stone I saw a tube which 

 ran down one of the perpendicular sides of the hole, in 

 which the rock fitted, then along the bottom to near the cen- 

 ter of where the stone lay. Here it disappeared taking a 



