458 ARACHNIDA. 



narrowed to a point at the tip ; the males not having; a strong; joint at the extremity of tlie anterior tihia?,— cnnstituti^ 

 the following- g-eriei'a : — 



Atiipiis, Latr., (Jlrli-m, Walek., having a very minute tongue, and the eyes placed close tog-ether upon a 

 tubercle. Type, A. Snhcri, l.atr., Araiwa plcea, Sulzer, about two-thirds of an inch long, and anteriorly of 

 a blackish cohnu'. This species burrows, in shelving ground, covererl witli turf, a cyHiidrical 

 cell, curved below, lined with a white silken tube. The egg-case is aifixed by silken threads 

 attached to each end, to the bottom of this tube. It is found in the vicinity of Paris, Boideaox, 

 &c. iM. Milbert has sent another species, found in the neighbourhood of Philadelphia. 



Eriodon, Latr., Missuleno, Walck., has the tongue long and narrow, and the eyes dispersed on 

 the front of the thorax. E. occatoriiis, Latr., from New Holland. 



C7(«/;>)(ra, Dalm., has the eyes placed on a very elevated frontal tubercle; four of these (the 

 t\YO anterior being very large) occupying the centre; the external spinnerets are \ery long. 

 Founded on a species observed by Dalman, in Copal. 



i'\g. 29— Airpus Qi||. second and last divisimi of the quadripiilnionan,'' Spiders (or genus jNIygale) is 



clifii-acteri^cd, as in Eriodon, by a narrow tongue, prolonged between the maxillffi, and 

 by 5-joint''d palpi, l.iiit the Imnks of tlic clielJcerai are folded upon their inner face ; they have six 

 spinnerets ; the fust pair of logs, and imt the fourth, is the longest, and tlie third the sliortest. Some 

 have only six eyes. The number of tlioir pnlmnuary sars does not allow us to separate this i^ubdivioiou 

 from The preceding; as they lead to Drassus, Clutho, and Segestria, which have only two pulmonary 

 sacs, the natural order does not permit us to pass from Jlygalc to the chasing Spiders, i//eo.vf7 ; 

 Mygale, in fact, consists of weaving Spiders, and it is in tliis divisiuu that -1. avicularia was originally 

 placed by Liiin^us. 



Dysdera^ Latr., has six eyes, arranged in a horse-shoe, with the open part in fiont ; the chelicera: very roliust and 

 advanced, and the maxilUe straight and dilated at the insertion of the palpi. Ty[ic, 1). eri/thi-inn, Latr., "Walck., 

 [France, England. The Spiders of this and a new allied genus (Oo«oy>.y) have formed the subject ofameruon-, 

 published by R. Tempieton, Esq., in the last volume uf the Zoological Journal.^ 



FiHslni(i,'Lvi\r.,\i^?> eight eyes, arranged on a small elevation at the anterior extremity of the thorax ; the 

 chelicerre are small, and the niaxilI;E curved on the outer edge, and forming an arch round the tongue. Type, 

 T. blcolor, Latr., France. Another species is found at Guadaloupe, differing in having longer legs, &c. 



\Vo now })::ss to tliose species of Spiders wliieh have only a ]tair of pulmonary sacs and spiracles. 

 All the fnllowing species possess 5-joiiited palpi, inserted on tlie outer edge of the maxillte, near to the 

 base, ami often in a no'teh, the tongue produced between thern, nnd either sqiuire, triangular, or semi- 

 circular, and six spinnerets at the anus. The last joint of the palpi of the males is more or less ovoid, 

 and generally incloses in an excavation a verv' complicated sexual organ, but in Segestria it is simple. 

 "Witli tlie cxeeptinn of a very few species, entering into the genus Mygale, they compose that of 



Aranra, Lin. {Aroneus of some authors), 

 [Wliicli Latrcille divides into two piincipal groups, according to their sedentary or wandering habits.] 

 The first division coniprises the sedenlary Spiders, which construct w^ebs, or at least throw out tlireads 

 for the capture of their prey, and generally station themselves upon or near their webs as well as near 

 their eggs. Tiicir cyrs arr close tugctlier, upon the r)niad part of the forehead, sometimes eight in 

 number (four or two being in the middle, and the otlicrs at the side), or sometimes only six. [This 

 division comprises two subdivisions, the Rectigrades and tlie Laterigrades.] 



The iirst of these subdivisions com[irises those species which always walk straight forwards, wlience 

 are named Rfctigrades: they wravc close webs, upon whicli the} remain stationary, \'iith their legs 

 elevated in repose. Sometimes the two anterior and the two posterior are longest, and sometimes the 

 four anterior, or the fourth and the third pairs. The eyes are not arranged in a crescent. 



We may divide these into three sections [the TubileleSj Inequiteles, aud Orbifeles-]. 



The TuBiTEL^, or Tapestry-weavers, have cylindrical spinnerets, placed close togetlier in a bunch 

 directed l^ackwards. The legs are robust, with the anterior or posterior pair largest in si.uue, but all the 

 legs of nearly equal size in the others. 



In the two following subgenera, the maxillae form an arch round the tongue, thus approaching Filistata, and 



receding from the fnllowing. The eyes are always eight in number, arranged four and four in two transvei'se lines. 

 Clolhii (Walek., Vnirfca^ Dnfour,} a singular genus, with very small cheliceras, capable of being but slightly 

 extendeil, withoal inili, \Mtli very small hooks, the body short, legs long, and scarcely varying in relative length ; 

 the eyes are close together, and arranged in the same manner as in Miignle, Walck., three on each side, forming 

 £1 cuiTC, with the two other hirger ones in a line between them ; the maxillre and tongue are proportionably short; 



