I greatly envy those who are able to travel, and who have it in their power to investigate the habits of these creatures at several widely separated points; for there seems every probability that other new types of nest remain to be detected in warm climates, some of which may perhaps exceed those we have been here studying in beauty of workmanship and adaptation; it is at least certain that an abundant harvest of interesting facts in the life history of trap-door spiders remains yet to be gathered in. Indeed it appears to me that we are only on the threshold of discoveries of this kind, and that the materials brought together in the preceding pages may be considered as but a small sample of what may be collected on the outermost edge of this great domain. I shall be satisfied if I have been able in the present little work, to hold the door sufficiently ajar to permit those who love nature and her ways to catch a glimpse of the wonders and beauties of the untrodden land that lies beyond. APPENDIX. A. _Nemesia (Mygale) meridionalis_, Costa.[97] [Footnote 97: Costa, Fauna del Regno di Napoli, Aracnidi (1861), p. 14, tab. i. figs. 1-4. [Translation.]] "M. fusco rufoque-flavicante, maculis obscurioribus, thorace radiatim, abdomine seriatim dispositis, subtus thorace rufescente, abdomine flavidulo, mandibulis spinarum serie unica, tarsis omnibus spinulosis." "The cephalothorax oval, elongated and truncate in front, while the head is smooth and bare, with a group of eight eyes, a little keeled in the middle; of a fulvous-brown colour, with ten rather dusky spots arranged in rays, and corresponding to the direction of the eight legs (anche) and the two maxillæ. The mandibles are large, horizontal at first, then curved downwards, making a quarter of a circle, furnished with numerous hairs, especially on the inner side, and at the anterior extremity above there are mobile and rather long spines; below they are channelled, with six little teeth or spines on the edge (rilievo) of the inner face, clothed with many bristling hairs, with which the outside is also covered, but without any teeth; on the inner face they are flattened, so that they fit perfectly close. The fang is strong, curved, acute, and black. The maxillæ are clothed with brown hairs almost as the legs are, and at their extremity, on the outer side, stand the long palpi, rather hairy (pelacciuti), terminated by a very short and simple little claw. The sternal lip is very small and round. The abdomen oval, longer or shorter according to age, dusky ash in colour, spotted with brown, and covered with short and depressed (rasicci) hairs. The brown spots are disposed in slanting lines, placed obliquely to the median line, which is also brown; below it is somewhat lighter, and becomes slightly yellow, increasingly so in the female as pregnancy advances. The pulmonal sacs are always pale yellow, and involved in the fold (tramezzati dalla ripiegatura). Between these, and within