408 AuGusTA Rucker. 



those of the Galeodes though oii a small scale; they consist of very 

 small, and much convoluted tiibiiles. There is a pair of tliese testi- 

 ciüar tubules, oue on eitlier side of the abdomen. The Contents in 

 the living specimens lock not unlike the contents of the ovary, which 

 consist princii)ally of yolk bodies. But I do not wish to give any 

 further notes on the internal anatomy of Koenenia nntil time permits 

 nie to study it extensively and in comparison with the corresponding 

 Organs in Thclyphonus and Galcodes, on which I am engaged. Like- 

 wise for comparison dissection should be made and sections had of 

 all of the other Orders of the Arachnida, which occnr here so abiiu- 

 dantly. For the present it will suffice to give some account of the 

 occurrence and habits of Koenenia together with the specific and 

 variable characters of the adult, with notes on the ontogeny. 



Up to the present time so far as is known to me. it has been 

 stated that Koenenia ai'e always found under stones of a definite 

 degree of moisture. That they are positively hydrotropic is evident 

 from their disappearance during drought, and appearance only after 

 a rain. They are likewise decidely positive in their stereotropic 

 reaction, but the moisture Stimulus m.ust of a necessity be the stronger 

 one. When there was only an irregulär surface moisture the animals 

 were found under the rough and porous Austin and Dallas limestone, 

 which not only held the moisture perfectl}^ but, in the crevices 

 formed by their decay and Splitting, afforded perfect conditions for 

 Koenenia to take up their abode away from the light, which they 

 shun as do the Solpugida. On picking up small stones the Koenenia 

 immediately ran to the edge and down on the other side, which 

 was now turned from the light. Dr. Wheeler who has most kindly 

 collected a great number of the Solpugida for me teils me that they 

 react in exactly the same way to light. ^) It seemed plausible to 



1) Hunger does not necessarily cliange Koenenia from negative to 



positive heliotropism , since its food is obtained Underground ; but in the | 



case of Galeodes I believe it to be difFerent, from observing their behavior j 



in several instances. In our sitting-room a ypecimen of (JoJecjdes was \ \ 

 captured standing where the 16 power electric light shone füll on it. 



That it was hungry was evident from the fact that as soon as it was | 



captured, which was about 11, P. M. it attacked and ate a June beetle j 



{Lacltnosterna, farcla) larger than itself. Nothing more was ofFered it that I 

 night but next morning it ate three flies and five leaf-chafers and then 



retired to a dark place under a piece of folded paper and remained quiet. | 



Whenever it was dislodged from its resting place and exposed to the light | 



it again sought the dark imder the paper. Another specimen, brought i 



