- 156 - 



"Katadysas". 



"Characters. Eyes eight. subequal, in tworows, both ctirved downwards; fang 

 of the cheliceres articulated downwards; palpi inserted near the extremity of 

 the maxillae. Feet 4. 1. 2. j. Pulmonary orífices only two." 



Observatio7is. This very anomalous spider. found only once, offers a very 

 striking instance of the manner in which nature combines characters, so as to 

 sepárate widely animáis which are apparently closely allied. This has all the 

 essential characters of Mygale, but one (having but two pulmonary orífices), and 

 yet it is obviously related to Lycosa, near which it should be placed in a natural 

 arrangement. I know nothing of its habits, except that it dwells or hides under 

 stones. It probably inakes no web. 



"Habitat. Alabama. 



"Katadysas pumilus. 

 Pl. 17. fig. 16. 



Ci Description. Livid, testaceous; cephalothorax with two longitudinal bands 

 near the middle. and two curved fillets near the edge. fuscous; abdomen with a 

 line bifurcated anteriorly on the middle, and two lines of minute dots on the 

 sides, fuscous ; same colour underneath, with minute fuscous dots". 



"Habitat. North Alabama. Under stones." 



Yeux. — Dans les genre Zom, les yeux sont les memes de 

 Catadysas, mais quelques-uns des auteurs que j'ai consultes 

 á propos de celui-lá ne s'expriment pas tous de la mome ma- 

 niere. Je vais citer quelques exemples: 



WESTRING, N. Araneae Svecicae, 1861.P.324 : "O c ul i 4 antici, perpendicu- 

 lariter et a postice inspecti. propter frontis formam inseriem recurvatam digestí, 

 sed, ab antice contevifilati, in scriem rectam digestí videntur ; series postica val- 

 de recurvata : oculi laterales postici ab oculis lateralibus anticis duplo, saltem 



dimidio longius quam oculi intermedii antici et postici ínter se distant; 



oculi dúo intermedii seriei posticae majores quam oculi seriei anticae " 



SIMON, ~E.,Hist. Naturelle des Araignées, 1864, p. 371. "Yeux peu ínégauxet 

 sur deux lignes : rantérieure presque droite, trés rapprochée du rebord mandi- 

 bulaire. Les yeux intermédiaires en sont un peu plus petits que les latéraux; 

 ligne supérieure trés-courbée en avant, yeux égaux et plus gros que les antérieurs. 



SIMON E. Les Arachnides de France, T. IV, 1878, p. 314. "Yeux antérieurs en 

 ligne droite ou presque droite, assez resserrés, égaux ou les médians plus gros.. . 



OHLERT, E. Die Araneiden o. echten Spin. d. Prov. Preussen, 1867, p. 129. 

 "Die Augen der vordern Reihe klein in schwach gebogener Linie" .... 



STAVELEY. E. F. British Spiders, 1866. p. 52. (Hecaérge) "Eyes. Four large 

 and four small. The four small form a small crescent next the face, the four large 

 form a larger crescent behind them. The crescents have their convex side to- 

 wards the face". (In H. spinimana.) : The two Í7iner eyes of the fr07it row are 

 larger than the two outer" . (Tab. I, f. 4 wrong). 



KOCK. C. L. Die Arachniden. Tf. 481, f. 1343. 



HENTZ, N. M. (v. supra). 



