ARACHNOIDEA. 589 
threads to young spiders. Regne Anim. 2 éd. IV. pp. 219, 220. Comp. J. 
BLAcKWALt Catalogue of British Spiders, including Remarks on their Struc- 
ture, Functions, Economy and Systematic Arrangement, Ann. nat. Hist. 2nd 
Series, VII.—1x. 1851—1853. 
Phalanx I. Arenee tetrapneumones, Mygalides SUNDEY., Kocu. 
Spinarets four, two of them large, exsert, two others very short. 
(Stigmata four, leading to four pulmonary sacs. Ocelli always 
eight. Claw at the apex of mandible in the same direction as 
the mandible, capable of inflection downwards, large, incurved). 
Mygale Waucx. Ocelli approximate, situated in the anterior 
part of cephalothorax ( 7: :!). Palps proceeding from the apex 
of maxille. Labrum inserted under the base of maxille, very 
small, quadrate. Feet hirsute, subequal, first and fourth pairs 
longer. 
Sp. Mygale avicularia WatcK., Aranea avicularia L., KLEEMANN Beitrdge, 
Tab. XI. x11., Dr Grrr Mém. vit. Pl. 38, fig. 8; a large spider of 8. 
America; the body 1” 6’ and more, the hind legs 2” 3”; it lives in a 
tubular web narrowed behind, in chinks of bark of trees, between stones, 
&c.; the female places the web in which she has laid her eggs close to her 
nest. It has been asserted that these spiders are able to seize small birds 
(humming-birds), and hence the name of this species; there is, however, no 
reason to think that the account is founded on any thing better than fable. 
See on the web and mode of life of this animal Latreinun Mém. du Mus. 
vul. 1832, pp. 456—460, and W. 8. Mao Leay Trans, of the Zool. Soc. 
I. 2, 1834, pp. 179—194. Other similarly large species are also found in 
the eastern hemisphere, as Mygale fasciata Wauck. Hist. nat. des Aran. 
Iv. Pl. 1; Ceylon. 
Cteniza Latr. Mandible furnished beneath, near the claw, with 
a row of horny barbs. 
Sp. Mygale cementaria LatR., WAucK., Hist. nat. des Aran, 111. Pl. 10:— 
Mygale fodiens Waucx., Mygale Sauvagesit Larr.: these species of southern 
Kurope, which certain exotic species resemble, live in vertical tubular 
cavities underground, closed by a circular cover as by a door, and lined 
internally with silken web. On the inside of the cover are small impres- 
sions, to which the spider attaches itself by means of the hooklet of the 
jaws, holding fast to the walls of the tube with its feet, in order to keep the 
door close when an attempt is made to open it; this shuts down by its own 
weight. See Sauvaces Mém. de V Acad. des Sc. de Paris, 1758, Hist. 
p. 26, LarrertLE Mémoires de la Soc. d’ Hist. nat. de Paris, &c., An. Vit. 
4to. pp. 118—128, Pl. v1., Aupourn Ann. de la Soc. entom. 11. 1833, pp. 
69—85. Pl. 4. 
Oletera W AaucK., Atypus Latr. 
Eriodon Latr., Missulena WALcK. 
