124 MODERN SYSTEM. 



The mandibles of the male are porrect, and rather more than 

 halt the length of the thorax; those of the female rather vertical. 



** The two external cj/es on each aide placed rather close to each 

 other. (Maxilla; not always thickened at their base; the first arid 

 then the second pair of legs longest.) 



A. Maxilla somewhat thickened at their base, and transversely im- 



pixssed before the middle. 



Sp. 2. Clu. Nutrix. Ungulas black : thorax and mandibles light red : 

 legs very light red : abdomen yellowish green, with an obscure lon- 

 gitudinal band. 



It has once occurred in England, near Cheltenham. 



B. Maxilhe not thickened at their base ; Jront not transversely im- 



pressed. 



Sp. 3. Clu. atrox. Brown : logs pale: tibi;e with dark spots: middle of 

 the back of the abdomen with a somewhat quadrate black spot, 

 margined with yellow. 



Inhabits old walls and the fissures of rocks. It is very common in 

 Britain and France. 



Genus 11. AllANEA of authors. Tegenekia. WaUk. 



Maxilla straight and longitudinal, with their internal angle distinctly 

 truncate, diameter equal, apex rounded : /;/) elongate, nearly qua- 

 drate, longer than broad, towards the superior angles a liltle nar- 

 rower: legs, the anterior pair about the same length with the fourth 

 pair; third pair shortest: eyes disposed in two transverse lines near 

 each other, and bent backwards. 



Sp. 1. Ar. domestica. Livid-cinereous; thorax of the 7«a/e immaculate; 

 of the female, on each side with a longitudinal l)iackish band : abdo- 

 men blackish, middle of its back with a longitudinal, maculose, 

 dentatcd band, and the lateral lineolce livid. 



Aranea domestica. Linn., Fabr., Latr., Leach. Tegeneria domestica. 

 Walck. 



Inhabits houses in Europe; spinning its web in a place where there is 

 a cavity, such as the corner of a room. The mode of constructing 

 the web is curious. Having chosen a convenient situation, she fixes 

 one end of the thread to the wall, and passes on to the other side, 

 dragging the thread along with her, till she arrive at the other side, 

 where she fixes the other end of it. Thus she passes and repasses 

 luitil she has made as many parallel threads as are necessary; she 

 then crosses these by other threads. This net is intended for the 

 capture of her prey ; and, in addition to it, the animal prepares a 

 cell for herself, where she remains concealed, and on the watch. Be- 

 t\Yeen the cell and the net the spider builds a bridge of threads, which, 



