180 Mr. J. O. Westwood's Observations 



The correctness of these views seems to be confirmed by the 

 circumstance that the palpi of the male Actinopl, in addition to 

 the extra or seventh joint, noticed by Messrs. Perty and Lucas, 

 have the male exciting organs developed at the extremity of this 

 seventh joint, under the form of a globular joint and hook, as 

 represented by Lucas in his figure 5, (Ann. Soc. Ent. Fr. t. vii. 

 pi. 13), which figure is alone sufficient to lead us to the conclu- 

 sion, that K and K constitute an additional joint, armed with a 

 single hook, answering perfectly to the short fleshy unguiferous 

 joint of the feet of the female Actinopi, or to the terminal deve- 

 loped joint of the foot of Hersilia. 



There still remains to notice another anomalous genus de- 

 scribed by Mr. MacLeay, under the name of Otiothops, as an 

 example that the feet may, on the other hand, occasionally assume 

 the ordinary number of joints of the palpi, the fore legs of that 

 genus having only six joints instead of seven: it is always difficult to 

 reduce these remarkable forms to the typical structure, but judg- 

 ing from the figure of the foot detached, it would appear that the 

 coxa and trochanter have become soldered together, the second joint 

 being represented as very large, and having all the appearance of 

 a femur. 



A few remarks upon the habits of the Ant'inopus cedijicatorius 

 will conclude this memoir. These will be confined to the slight 

 observations 1 have been able to make upon the individuals 

 since they have been in the possession of this Society. I regret 

 that these observations must necessarily be scanty, owing to the 

 lateness of the season when they arrived. Two nests were 

 forwarded, each of which contained a living female. Flies were 

 given to them, or rather were placed in the nests by raising the 

 valve, which the spiders devoured. Occasionally it required con- 

 siderable force to raise the valve, in which cases it was found that 

 the inhabitant had seized it with the hooks of the chelicerge, the 

 ungues of the palpi, and of the four fore legs. On examining the 

 undersurface of the valve, its surface presents many minute ele- 

 vations, but there are none of the minute impressions arranged 

 in a semicircle, as described by M. V. Audouin on the underside 

 of the valve of M. fodlens. Our spider contented itself with 

 thrusting the acute points of its cheliceral hooks and ungues into 

 the meshes of the very fine silk, neither did the insect apply 

 the rugose extremity of the chelicerse to the undersurface of the 

 valves, and with all deference to M. V. Audouin, I do not be- 

 lieve it possible that M.fodiens can introduce into the " trous de 



