148 Schibdte's Specimen 



One of them belongs to the order Aranece, and is connected 

 with the few known genera having two pairs of respiratory ori- 

 fices, of which only the first pair contains air-gills, the other 

 containing tracheae. It is besides, in other respects, nearly allied 

 to the genus Dysdera, though in its habit it still more resembles 

 the otherwise far removed genus Desis.* Besides its want of 

 sight, it differs from Dysdera, by various discrepancies in the 

 parts of the mouth, the proportions of its limbs, and the naked 

 abdomen. 



Stalita. 

 Ordo Araneje. Familia Dysdera. 

 Oculi nulli. Antennce mandibulars subporrectce, conicce, ungue 

 sublateralher injtexo. Maxillce mala elongata, apice oblique 

 truncato, margine interiori dense barbato. Labium sternale 

 elongatum, angustum, apice subrotundato. Pedes elongati, 

 subcequales, tertii pans breviores. Abdomen nudum. 



Stalita T^naria. 



Pallide ferruginea, antennis palpisque fuscescentibus, abdomine 

 animalis vivi niveo : nitida, subglabra, palpis pedibusque spis- 

 sius pilosis. Long. 3 lin. 



The other genus, of the order of Solifugce, is a colossal form 

 of the family of Obisia, being closely allied to Obisium, though 

 apparently differing by its remarkably slender and elongated 

 limbs and palpi, the rudimentary state of the horny abdominal 

 scales, its want of eyes, and, lastly, its remarkable size. 



Both these Arachnidans are rust-coloured, with a white abdo- 

 men ; they are swift animals, readily escaping pursuit, unless 

 they are caught at a distance from their places of resort. 



Blothrus. 



Ordo Solifugje. Familia Obisia. 



Oculi nulli. Pollex antennarum mandibularium appendice nulla. 

 Cephalothorax integer. Pedes elongati, gracillimi ; tibice an- 

 teriores biarticulatce ; femora posteriora sutura ante medium 



* At least the only known species, Desis dysderoides, Walck. (Hist. Nat. des 

 Apteres, i. p. 610), which is identical with the original specimen in the Royal 

 Museum of Natural History, of Aranea maxillosa, Fabr. (Entom. Syst. ii. p. 41 1, 

 n. 17.) 



