CLASS III. ARACHNOIDA. 



m 



** E^cs not describing the segment of a circle. Maxillcc straii^ht, 

 with tlieir points dilated. 



Genus 17. TETRAGNATIIA. LatreiUe, Leach. 



Ej/es subcqual ; disposed in nvo straight and almost parallel transverse 

 lines, the four middle ones forming nearly a regular quadrangle : 

 jnuxilUe straight, elongate and narrow, almost equally broad ; the 

 apex externally dilated and round : lip semicircular and somewhat 

 notched : legs very long and very slender; the first pair longest, then 

 the second, afterwards the fourth. 



Sp. 1. Tet. extcnsa. Reddish; abdomen oblong, golden green, with 

 the sides and two lines below yellowish; the middle below longitu- 

 dinally black. 



Aranea extensa. Linn., Fair. Tetragnatha extensa. Latr.,Walck., Leach. 



Inhabits Europe; frequenting moist places, in which it constRicls a 

 vertical web, sitting on it with its legs extended. 



Genus 18. EPEIRA. Walckender, Lalrcille, U^ach. 



Latreille has divided this genus into sections, most of which would 

 form good genera. 



Ei/es with the four middle ones placed on an abruptly formed tubercle 

 in the form of a quadrangle, the two anterior ones largest and most 

 distant; the lateral eyes on each side subgeminated and placed ob- 

 liquely on a tubercle : maxilUv subcircular, internally membrana- 

 ceous : lip semicircular ; short, with the point membranaceous : legs 

 moderately long, hispid, the thighs rather strong; the first pair 

 largest, then the second, afterwards the fourth pair: thorax inversely 

 elongate subcordate, anteriorly broadly truncated : uhdumen subglo- 

 bose, large, much broader than the thorax. 



Sp. 1. Ep.Diudcma. Reddish; abdomen globose-oval, with an elevated 

 angle on each side of its base ; dorsal bund broad, triangular, den- 

 tated, darker, with a triple cross of luteous white dots or spots, and 

 with four impressed dots disposed in a quadrangle. 



Aranea Diadcma. Linn. Araignee a croix. De Geer. Epeira Dia- 

 dema. Walck., Latr., Leach. 



Inhabits Europe. It frequents the borders of woods, rocks, and gar- 

 dens, and is well known in Britain by the names Sceptre or Diadem 

 Spider. 



*** Eyes describing the seginent of a circle. 



Genus 19. TIIOMISUS. Walck., Latr., Leach. Heteropoda. 



i«/f. MisuMENA. Latr. 



Ei/es generally subequal, placed in two transverse lines in a kind of 



semicircle : maxilla oblique, covering the side of the lip. and in some 



degree converging; the mternal apex truncate: lip somewhat oval 



